/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:49:37,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:49:37,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:49:37,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 17:49:37,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 17:49:37,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 17:49:37,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 17:49:37,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 17:49:37,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 17:49:37,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 17:49:37,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 17:49:37,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 17:49:37,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 17:49:37,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 17:49:37,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 17:49:37,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 17:49:37,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 17:49:37,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 17:49:37,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 17:49:37,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 17:49:37,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 17:49:37,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 17:49:37,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 17:49:37,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 17:49:37,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-09 17:49:37,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 17:49:37,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 17:49:37,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 17:49:37,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 17:49:37,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 17:49:37,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 17:49:37,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 17:49:37,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 17:49:37,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 17:49:37,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 17:49:37,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 17:49:37,477 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 17:49:37,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:49:37,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:49:37,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:49:37,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:49:37,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:49:37,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:49:37,520 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:49:37,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:49:37,521 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:49:37,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:49:37,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:49:37,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:49:37,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:49:37,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:49:37,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:49:37,522 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:49:37,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:49:37,523 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:49:37,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:49:37,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:49:37,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:49:37,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:49:37,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:49:37,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:49:37,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:49:37,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:49:37,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:49:37,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:49:37,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:49:37,524 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:49:37,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:49:37,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:49:37,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:49:37,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:49:37,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:49:37,827 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:49:37,828 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:49:37,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl [2021-07-09 17:49:37,829 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl' [2021-07-09 17:49:37,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:49:37,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:49:37,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:49:37,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:49:37,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:49:37,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:49:37" (1/1) ... [2021-07-09 17:49:37,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:49:37" (1/1) ... [2021-07-09 17:49:37,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:49:37,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:49:37,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:49:37,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:49:37,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:49:37" (1/1) ... [2021-07-09 17:49:37,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:49:37" (1/1) ... [2021-07-09 17:49:37,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:49:37" (1/1) ... [2021-07-09 17:49:37,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:49:37" (1/1) ... [2021-07-09 17:49:37,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:49:37" (1/1) ... [2021-07-09 17:49:37,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:49:37" (1/1) ... [2021-07-09 17:49:37,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:49:37" (1/1) ... [2021-07-09 17:49:37,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:49:37,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:49:37,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:49:37,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:49:37,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:49:37" (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 17:49:37,966 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:49:37,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:49:37,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:49:37,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:49:37,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:49:37,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:49:37,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:49:37,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:49:37,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:49:37,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:49:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:49:37,968 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:49:37,968 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 17:49:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 17:49:37,968 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 17:49:37,968 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-07-09 17:49:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-07-09 17:49:37,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-07-09 17:49:37,969 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-07-09 17:49:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-07-09 17:49:37,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-07-09 17:49:37,971 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 17:49:38,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:49:38,321 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-07-09 17:49:38,322 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-09 17:49:38,322 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-07-09 17:49:38,322 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-07-09 17:49:38,322 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-07-09 17:49:38,324 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:49:38 BoogieIcfgContainer [2021-07-09 17:49:38,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:49:38,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:49:38,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:49:38,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:49:38,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:49:37" (1/2) ... [2021-07-09 17:49:38,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@357220db and model type parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:49:38, skipping insertion in model container [2021-07-09 17:49:38,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:49:38" (2/2) ... [2021-07-09 17:49:38,345 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1-dsl.wvr.bpl [2021-07-09 17:49:38,349 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:49:38,350 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:49:38,350 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:49:38,350 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:49:38,527 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-07-09 17:49:38,545 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-09 17:49:38,563 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:49:38,563 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:49:38,563 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:49:38,563 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:49:38,563 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:49:38,564 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:49:38,564 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:49:38,564 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread4Thread1of1ForFork1======== [2021-07-09 17:49:38,576 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-07-09 17:49:38,610 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 120 states, 119 states have (on average 2.966386554621849) internal successors, (353), 119 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 120 states, 119 states have (on average 2.966386554621849) internal successors, (353), 119 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:38,622 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 17:49:38,631 INFO L301 ceAbstractionStarter]: Result for error location thread4Thread1of1ForFork1 was SAFE (1/3) [2021-07-09 17:49:38,632 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-09 17:49:38,643 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:49:38,643 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:49:38,643 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:49:38,643 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:49:38,644 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:49:38,644 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:49:38,645 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:49:38,645 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1Thread1of1ForFork0======== [2021-07-09 17:49:38,648 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-07-09 17:49:38,659 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 101 states, 100 states have (on average 2.96) internal successors, (296), 100 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 100 states have (on average 2.96) internal successors, (296), 100 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:38,662 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 17:49:38,663 INFO L301 ceAbstractionStarter]: Result for error location thread1Thread1of1ForFork0 was SAFE (2/3) [2021-07-09 17:49:38,664 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:49:38,671 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:49:38,671 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:49:38,672 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:49:38,672 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:49:38,672 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:49:38,672 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:49:38,672 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:49:38,672 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:49:38,673 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-07-09 17:49:38,699 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 403 states, 402 states have (on average 3.8855721393034828) internal successors, (1562), 402 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 403 states, 402 states have (on average 3.8855721393034828) internal successors, (1562), 402 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:38,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:38,712 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:38,713 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2039335680, now seen corresponding path program 1 times [2021-07-09 17:49:38,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:38,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448699420] [2021-07-09 17:49:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:38,945 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 17:49:38,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:38,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448699420] [2021-07-09 17:49:38,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448699420] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:38,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:38,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:49:38,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006414002] [2021-07-09 17:49:38,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:49:38,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:38,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:49:38,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:49:38,964 INFO L87 Difference]: Start difference. First operand has 403 states, 402 states have (on average 3.8855721393034828) internal successors, (1562), 402 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:39,059 INFO L93 Difference]: Finished difference Result 1089 states and 4336 transitions. [2021-07-09 17:49:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:49:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:49:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:39,093 INFO L225 Difference]: With dead ends: 1089 [2021-07-09 17:49:39,093 INFO L226 Difference]: Without dead ends: 1068 [2021-07-09 17:49:39,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:49:39,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-07-09 17:49:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 525. [2021-07-09 17:49:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.881679389312977) internal successors, (2034), 524 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 2034 transitions. [2021-07-09 17:49:39,185 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 2034 transitions. Word has length 22 [2021-07-09 17:49:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:39,186 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 2034 transitions. [2021-07-09 17:49:39,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 2034 transitions. [2021-07-09 17:49:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:39,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:39,189 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:39,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:49:39,190 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:39,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:39,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1643355036, now seen corresponding path program 2 times [2021-07-09 17:49:39,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:39,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871913564] [2021-07-09 17:49:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:39,240 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 17:49:39,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:39,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871913564] [2021-07-09 17:49:39,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871913564] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:39,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:39,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:49:39,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432117351] [2021-07-09 17:49:39,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:49:39,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:39,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:49:39,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:49:39,244 INFO L87 Difference]: Start difference. First operand 525 states and 2034 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:39,290 INFO L93 Difference]: Finished difference Result 1218 states and 4830 transitions. [2021-07-09 17:49:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:49:39,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:49:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:39,300 INFO L225 Difference]: With dead ends: 1218 [2021-07-09 17:49:39,300 INFO L226 Difference]: Without dead ends: 1197 [2021-07-09 17:49:39,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:49:39,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-07-09 17:49:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 545. [2021-07-09 17:49:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.8529411764705883) internal successors, (2096), 544 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 2096 transitions. [2021-07-09 17:49:39,333 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 2096 transitions. Word has length 22 [2021-07-09 17:49:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:39,333 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 2096 transitions. [2021-07-09 17:49:39,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 2096 transitions. [2021-07-09 17:49:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:39,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:39,336 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:39,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:49:39,336 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:39,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:39,337 INFO L82 PathProgramCache]: Analyzing trace with hash -661584511, now seen corresponding path program 1 times [2021-07-09 17:49:39,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:39,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069595686] [2021-07-09 17:49:39,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:39,359 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 17:49:39,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:39,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069595686] [2021-07-09 17:49:39,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069595686] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:39,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:39,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:49:39,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571331280] [2021-07-09 17:49:39,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:49:39,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:39,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:49:39,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:49:39,362 INFO L87 Difference]: Start difference. First operand 545 states and 2096 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:39,386 INFO L93 Difference]: Finished difference Result 545 states and 1997 transitions. [2021-07-09 17:49:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:49:39,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:39,390 INFO L225 Difference]: With dead ends: 545 [2021-07-09 17:49:39,390 INFO L226 Difference]: Without dead ends: 529 [2021-07-09 17:49:39,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:49:39,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-07-09 17:49:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-07-09 17:49:39,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.6761363636363638) internal successors, (1941), 528 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1941 transitions. [2021-07-09 17:49:39,409 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1941 transitions. Word has length 24 [2021-07-09 17:49:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:39,409 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1941 transitions. [2021-07-09 17:49:39,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1941 transitions. [2021-07-09 17:49:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:39,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:39,411 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:39,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:49:39,412 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1055352097, now seen corresponding path program 1 times [2021-07-09 17:49:39,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:39,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418939517] [2021-07-09 17:49:39,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:39,446 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 17:49:39,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:39,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418939517] [2021-07-09 17:49:39,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418939517] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:39,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:39,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:49:39,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754059821] [2021-07-09 17:49:39,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:49:39,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:39,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:49:39,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:49:39,448 INFO L87 Difference]: Start difference. First operand 529 states and 1941 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:39,609 INFO L93 Difference]: Finished difference Result 1358 states and 5017 transitions. [2021-07-09 17:49:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:49:39,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:39,619 INFO L225 Difference]: With dead ends: 1358 [2021-07-09 17:49:39,619 INFO L226 Difference]: Without dead ends: 1346 [2021-07-09 17:49:39,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:49:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-07-09 17:49:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 680. [2021-07-09 17:49:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.787923416789396) internal successors, (2572), 679 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2572 transitions. [2021-07-09 17:49:39,654 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2572 transitions. Word has length 24 [2021-07-09 17:49:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:39,654 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2572 transitions. [2021-07-09 17:49:39,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2572 transitions. [2021-07-09 17:49:39,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:39,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:39,657 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:39,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:49:39,658 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:39,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:39,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2074450649, now seen corresponding path program 1 times [2021-07-09 17:49:39,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:39,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330524561] [2021-07-09 17:49:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:39,674 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 17:49:39,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:39,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330524561] [2021-07-09 17:49:39,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330524561] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:39,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:39,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:49:39,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021382054] [2021-07-09 17:49:39,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:49:39,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:39,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:49:39,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:49:39,677 INFO L87 Difference]: Start difference. First operand 680 states and 2572 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:39,699 INFO L93 Difference]: Finished difference Result 652 states and 2325 transitions. [2021-07-09 17:49:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:49:39,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:39,706 INFO L225 Difference]: With dead ends: 652 [2021-07-09 17:49:39,706 INFO L226 Difference]: Without dead ends: 604 [2021-07-09 17:49:39,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:49:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-07-09 17:49:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-07-09 17:49:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.583747927031509) internal successors, (2161), 603 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2161 transitions. [2021-07-09 17:49:39,729 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2161 transitions. Word has length 24 [2021-07-09 17:49:39,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:39,732 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 2161 transitions. [2021-07-09 17:49:39,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,732 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2161 transitions. [2021-07-09 17:49:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:39,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:39,738 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:39,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:49:39,739 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:39,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:39,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1944733407, now seen corresponding path program 1 times [2021-07-09 17:49:39,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:39,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364029773] [2021-07-09 17:49:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:39,785 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 17:49:39,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:39,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364029773] [2021-07-09 17:49:39,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364029773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:39,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288202651] [2021-07-09 17:49:39,787 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 17:49:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:39,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:49:39,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:40,013 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 17:49:40,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288202651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:40,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:40,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:49:40,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486245853] [2021-07-09 17:49:40,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:49:40,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:40,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:49:40,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:49:40,015 INFO L87 Difference]: Start difference. First operand 604 states and 2161 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:40,083 INFO L93 Difference]: Finished difference Result 1057 states and 3653 transitions. [2021-07-09 17:49:40,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:49:40,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:40,089 INFO L225 Difference]: With dead ends: 1057 [2021-07-09 17:49:40,089 INFO L226 Difference]: Without dead ends: 989 [2021-07-09 17:49:40,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:49:40,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-07-09 17:49:40,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 685. [2021-07-09 17:49:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.6271929824561404) internal successors, (2481), 684 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2481 transitions. [2021-07-09 17:49:40,118 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2481 transitions. Word has length 24 [2021-07-09 17:49:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:40,119 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2481 transitions. [2021-07-09 17:49:40,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2481 transitions. [2021-07-09 17:49:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:40,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:40,121 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] [2021-07-09 17:49:40,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-07-09 17:49:40,345 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:40,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1051081059, now seen corresponding path program 2 times [2021-07-09 17:49:40,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:40,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77320107] [2021-07-09 17:49:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:40,388 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 17:49:40,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:40,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77320107] [2021-07-09 17:49:40,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77320107] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:40,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:40,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:49:40,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430849731] [2021-07-09 17:49:40,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:49:40,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:40,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:49:40,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:49:40,390 INFO L87 Difference]: Start difference. First operand 685 states and 2481 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:40,488 INFO L93 Difference]: Finished difference Result 990 states and 3448 transitions. [2021-07-09 17:49:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:49:40,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:40,495 INFO L225 Difference]: With dead ends: 990 [2021-07-09 17:49:40,496 INFO L226 Difference]: Without dead ends: 963 [2021-07-09 17:49:40,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:49:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-07-09 17:49:40,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 703. [2021-07-09 17:49:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.6210826210826212) internal successors, (2542), 702 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2542 transitions. [2021-07-09 17:49:40,543 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2542 transitions. Word has length 24 [2021-07-09 17:49:40,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:40,544 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2542 transitions. [2021-07-09 17:49:40,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2542 transitions. [2021-07-09 17:49:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:40,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:40,546 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:40,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:49:40,547 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:40,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:40,547 INFO L82 PathProgramCache]: Analyzing trace with hash -219308433, now seen corresponding path program 2 times [2021-07-09 17:49:40,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:40,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462625286] [2021-07-09 17:49:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:40,579 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 17:49:40,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:40,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462625286] [2021-07-09 17:49:40,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462625286] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:40,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:40,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:49:40,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480847459] [2021-07-09 17:49:40,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:49:40,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:40,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:49:40,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:49:40,582 INFO L87 Difference]: Start difference. First operand 703 states and 2542 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:40,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:40,658 INFO L93 Difference]: Finished difference Result 1033 states and 3563 transitions. [2021-07-09 17:49:40,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:49:40,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:40,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:40,665 INFO L225 Difference]: With dead ends: 1033 [2021-07-09 17:49:40,665 INFO L226 Difference]: Without dead ends: 949 [2021-07-09 17:49:40,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:49:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-07-09 17:49:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 628. [2021-07-09 17:49:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.5964912280701755) internal successors, (2255), 627 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2255 transitions. [2021-07-09 17:49:40,688 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2255 transitions. Word has length 24 [2021-07-09 17:49:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:40,688 INFO L482 AbstractCegarLoop]: Abstraction has 628 states and 2255 transitions. [2021-07-09 17:49:40,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:40,689 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2255 transitions. [2021-07-09 17:49:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:40,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:40,691 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:40,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:49:40,691 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:40,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1513578361, now seen corresponding path program 3 times [2021-07-09 17:49:40,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:40,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127554656] [2021-07-09 17:49:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:40,717 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 17:49:40,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:40,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127554656] [2021-07-09 17:49:40,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127554656] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:40,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:40,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:49:40,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399259642] [2021-07-09 17:49:40,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:49:40,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:40,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:49:40,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:49:40,719 INFO L87 Difference]: Start difference. First operand 628 states and 2255 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:40,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:40,819 INFO L93 Difference]: Finished difference Result 847 states and 3018 transitions. [2021-07-09 17:49:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:49:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:40,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:40,824 INFO L225 Difference]: With dead ends: 847 [2021-07-09 17:49:40,824 INFO L226 Difference]: Without dead ends: 827 [2021-07-09 17:49:40,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:49:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-07-09 17:49:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 620. [2021-07-09 17:49:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.61389337641357) internal successors, (2237), 619 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:40,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2237 transitions. [2021-07-09 17:49:40,843 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2237 transitions. Word has length 24 [2021-07-09 17:49:40,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:40,844 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 2237 transitions. [2021-07-09 17:49:40,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:40,844 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2237 transitions. [2021-07-09 17:49:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:40,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:40,846 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:40,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 17:49:40,846 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:40,847 INFO L82 PathProgramCache]: Analyzing trace with hash 954675751, now seen corresponding path program 3 times [2021-07-09 17:49:40,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:40,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605373154] [2021-07-09 17:49:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:40,869 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 17:49:40,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:40,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605373154] [2021-07-09 17:49:40,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605373154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:40,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113686183] [2021-07-09 17:49:40,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:40,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:49:40,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:40,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:49:40,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:41,039 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 17:49:41,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113686183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:41,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:41,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:49:41,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836376079] [2021-07-09 17:49:41,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:49:41,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:41,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:49:41,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:49:41,041 INFO L87 Difference]: Start difference. First operand 620 states and 2237 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:41,134 INFO L93 Difference]: Finished difference Result 857 states and 3066 transitions. [2021-07-09 17:49:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:49:41,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:41,158 INFO L225 Difference]: With dead ends: 857 [2021-07-09 17:49:41,158 INFO L226 Difference]: Without dead ends: 857 [2021-07-09 17:49:41,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:49:41,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-07-09 17:49:41,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 548. [2021-07-09 17:49:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.579524680073126) internal successors, (1958), 547 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1958 transitions. [2021-07-09 17:49:41,180 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1958 transitions. Word has length 24 [2021-07-09 17:49:41,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:41,181 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1958 transitions. [2021-07-09 17:49:41,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1958 transitions. [2021-07-09 17:49:41,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:41,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:41,183 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:41,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 17:49:41,406 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:41,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1068078269, now seen corresponding path program 4 times [2021-07-09 17:49:41,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:41,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616169563] [2021-07-09 17:49:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:41,434 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 17:49:41,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:41,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616169563] [2021-07-09 17:49:41,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616169563] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:41,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:41,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:49:41,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374844882] [2021-07-09 17:49:41,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:49:41,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:41,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:49:41,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:49:41,436 INFO L87 Difference]: Start difference. First operand 548 states and 1958 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:41,520 INFO L93 Difference]: Finished difference Result 866 states and 3014 transitions. [2021-07-09 17:49:41,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:49:41,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:41,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:41,526 INFO L225 Difference]: With dead ends: 866 [2021-07-09 17:49:41,526 INFO L226 Difference]: Without dead ends: 842 [2021-07-09 17:49:41,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:49:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-07-09 17:49:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 608. [2021-07-09 17:49:41,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.602965403624382) internal successors, (2187), 607 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2187 transitions. [2021-07-09 17:49:41,546 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2187 transitions. Word has length 24 [2021-07-09 17:49:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:41,546 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 2187 transitions. [2021-07-09 17:49:41,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2187 transitions. [2021-07-09 17:49:41,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:41,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:41,573 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] [2021-07-09 17:49:41,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-09 17:49:41,573 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:41,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1932007235, now seen corresponding path program 4 times [2021-07-09 17:49:41,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:41,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835285005] [2021-07-09 17:49:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:41,610 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 17:49:41,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:41,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835285005] [2021-07-09 17:49:41,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835285005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:41,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415988599] [2021-07-09 17:49:41,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:41,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:41,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:41,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:49:41,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:41,756 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 17:49:41,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415988599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:41,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:41,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:49:41,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522106548] [2021-07-09 17:49:41,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:49:41,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:41,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:49:41,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:49:41,758 INFO L87 Difference]: Start difference. First operand 608 states and 2187 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:41,837 INFO L93 Difference]: Finished difference Result 825 states and 2855 transitions. [2021-07-09 17:49:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:49:41,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:41,842 INFO L225 Difference]: With dead ends: 825 [2021-07-09 17:49:41,842 INFO L226 Difference]: Without dead ends: 757 [2021-07-09 17:49:41,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:49:41,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-07-09 17:49:41,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 603. [2021-07-09 17:49:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.5930232558139537) internal successors, (2163), 602 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2163 transitions. [2021-07-09 17:49:41,861 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2163 transitions. Word has length 24 [2021-07-09 17:49:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:41,861 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 2163 transitions. [2021-07-09 17:49:41,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,861 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2163 transitions. [2021-07-09 17:49:41,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:41,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:41,863 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:42,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 17:49:42,077 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1038354887, now seen corresponding path program 5 times [2021-07-09 17:49:42,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:42,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782398405] [2021-07-09 17:49:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:42,101 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 17:49:42,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:42,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782398405] [2021-07-09 17:49:42,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782398405] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:42,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:42,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:49:42,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685397443] [2021-07-09 17:49:42,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:49:42,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:42,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:49:42,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:49:42,102 INFO L87 Difference]: Start difference. First operand 603 states and 2163 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:42,227 INFO L93 Difference]: Finished difference Result 985 states and 3379 transitions. [2021-07-09 17:49:42,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:49:42,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:42,233 INFO L225 Difference]: With dead ends: 985 [2021-07-09 17:49:42,233 INFO L226 Difference]: Without dead ends: 946 [2021-07-09 17:49:42,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:49:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-07-09 17:49:42,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 591. [2021-07-09 17:49:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.6) internal successors, (2124), 590 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 2124 transitions. [2021-07-09 17:49:42,251 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 2124 transitions. Word has length 24 [2021-07-09 17:49:42,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:42,251 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 2124 transitions. [2021-07-09 17:49:42,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 2124 transitions. [2021-07-09 17:49:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:42,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:42,254 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:42,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-09 17:49:42,254 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:42,254 INFO L82 PathProgramCache]: Analyzing trace with hash -206582261, now seen corresponding path program 5 times [2021-07-09 17:49:42,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:42,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064761287] [2021-07-09 17:49:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:42,281 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 17:49:42,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:42,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064761287] [2021-07-09 17:49:42,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064761287] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:42,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:42,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:49:42,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318902179] [2021-07-09 17:49:42,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:49:42,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:42,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:49:42,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:49:42,283 INFO L87 Difference]: Start difference. First operand 591 states and 2124 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:42,346 INFO L93 Difference]: Finished difference Result 783 states and 2748 transitions. [2021-07-09 17:49:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:49:42,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:42,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:42,351 INFO L225 Difference]: With dead ends: 783 [2021-07-09 17:49:42,351 INFO L226 Difference]: Without dead ends: 783 [2021-07-09 17:49:42,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:49:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-07-09 17:49:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 582. [2021-07-09 17:49:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 3.604130808950086) internal successors, (2094), 581 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2094 transitions. [2021-07-09 17:49:42,367 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2094 transitions. Word has length 24 [2021-07-09 17:49:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:42,367 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 2094 transitions. [2021-07-09 17:49:42,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,368 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2094 transitions. [2021-07-09 17:49:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:42,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:42,369 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:42,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-09 17:49:42,370 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:42,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:42,370 INFO L82 PathProgramCache]: Analyzing trace with hash 831548115, now seen corresponding path program 6 times [2021-07-09 17:49:42,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:42,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378087657] [2021-07-09 17:49:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:42,390 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 17:49:42,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:42,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378087657] [2021-07-09 17:49:42,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378087657] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:42,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:42,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:49:42,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439678731] [2021-07-09 17:49:42,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:49:42,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:42,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:49:42,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:49:42,392 INFO L87 Difference]: Start difference. First operand 582 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:42,459 INFO L93 Difference]: Finished difference Result 597 states and 2122 transitions. [2021-07-09 17:49:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:49:42,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:42,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:42,463 INFO L225 Difference]: With dead ends: 597 [2021-07-09 17:49:42,463 INFO L226 Difference]: Without dead ends: 565 [2021-07-09 17:49:42,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:49:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-09 17:49:42,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-07-09 17:49:42,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.6382978723404253) internal successors, (2052), 564 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2052 transitions. [2021-07-09 17:49:42,477 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2052 transitions. Word has length 24 [2021-07-09 17:49:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:42,477 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 2052 transitions. [2021-07-09 17:49:42,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2052 transitions. [2021-07-09 17:49:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:49:42,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:42,479 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] [2021-07-09 17:49:42,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-09 17:49:42,480 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:42,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1474843077, now seen corresponding path program 6 times [2021-07-09 17:49:42,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:42,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405166021] [2021-07-09 17:49:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:42,501 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 17:49:42,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:42,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405166021] [2021-07-09 17:49:42,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405166021] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:49:42,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:49:42,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:49:42,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057308774] [2021-07-09 17:49:42,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:49:42,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:42,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:49:42,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:49:42,503 INFO L87 Difference]: Start difference. First operand 565 states and 2052 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:42,572 INFO L93 Difference]: Finished difference Result 595 states and 2146 transitions. [2021-07-09 17:49:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:49:42,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:49:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:42,575 INFO L225 Difference]: With dead ends: 595 [2021-07-09 17:49:42,575 INFO L226 Difference]: Without dead ends: 595 [2021-07-09 17:49:42,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:49:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-07-09 17:49:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 487. [2021-07-09 17:49:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.625514403292181) internal successors, (1762), 486 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1762 transitions. [2021-07-09 17:49:42,588 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1762 transitions. Word has length 24 [2021-07-09 17:49:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:42,588 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1762 transitions. [2021-07-09 17:49:42,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,588 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1762 transitions. [2021-07-09 17:49:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:42,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:42,590 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:42,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-09 17:49:42,590 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:42,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1773823234, now seen corresponding path program 1 times [2021-07-09 17:49:42,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:42,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579136334] [2021-07-09 17:49:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:42,714 INFO 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 17:49:42,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:42,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579136334] [2021-07-09 17:49:42,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579136334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:42,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963083294] [2021-07-09 17:49:42,714 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 17:49:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:42,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:49:42,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:42,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:43,006 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 17:49:43,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:43,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:43,018 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 17:49:43,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:49:43,067 INFO 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 17:49:43,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963083294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:43,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:43,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:49:43,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977555736] [2021-07-09 17:49:43,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:49:43,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:43,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:49:43,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:49:43,068 INFO L87 Difference]: Start difference. First operand 487 states and 1762 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:43,531 INFO L93 Difference]: Finished difference Result 985 states and 3663 transitions. [2021-07-09 17:49:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:49:43,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:49:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:43,536 INFO L225 Difference]: With dead ends: 985 [2021-07-09 17:49:43,536 INFO L226 Difference]: Without dead ends: 904 [2021-07-09 17:49:43,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:49:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-07-09 17:49:43,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 559. [2021-07-09 17:49:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.6469534050179213) internal successors, (2035), 558 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 2035 transitions. [2021-07-09 17:49:43,553 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 2035 transitions. Word has length 26 [2021-07-09 17:49:43,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:43,553 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 2035 transitions. [2021-07-09 17:49:43,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:43,553 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 2035 transitions. [2021-07-09 17:49:43,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:43,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:43,556 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:43,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:43,781 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:43,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:43,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1216404668, now seen corresponding path program 1 times [2021-07-09 17:49:43,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:43,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936349201] [2021-07-09 17:49:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:43,917 INFO 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 17:49:43,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:43,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936349201] [2021-07-09 17:49:43,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936349201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:43,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74408772] [2021-07-09 17:49:43,918 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 17:49:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:43,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:49:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:44,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:44,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:49:44,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:44,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:44,166 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 17:49:44,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:49:44,212 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 17:49:44,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74408772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:44,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:44,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:49:44,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578972593] [2021-07-09 17:49:44,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:49:44,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:44,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:49:44,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:49:44,213 INFO L87 Difference]: Start difference. First operand 559 states and 2035 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:44,643 INFO L93 Difference]: Finished difference Result 985 states and 3680 transitions. [2021-07-09 17:49:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:49:44,643 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:49:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:44,648 INFO L225 Difference]: With dead ends: 985 [2021-07-09 17:49:44,648 INFO L226 Difference]: Without dead ends: 904 [2021-07-09 17:49:44,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:49:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-07-09 17:49:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 569. [2021-07-09 17:49:44,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.653169014084507) internal successors, (2075), 568 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 2075 transitions. [2021-07-09 17:49:44,667 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 2075 transitions. Word has length 26 [2021-07-09 17:49:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:44,667 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 2075 transitions. [2021-07-09 17:49:44,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 2075 transitions. [2021-07-09 17:49:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:44,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:44,669 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:44,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:49:44,885 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:44,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1592934016, now seen corresponding path program 2 times [2021-07-09 17:49:44,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:44,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957419992] [2021-07-09 17:49:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:45,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:45,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957419992] [2021-07-09 17:49:45,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957419992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:45,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544974121] [2021-07-09 17:49:45,016 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 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 17:49:45,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:45,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:45,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:49:45,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:45,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:45,162 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 17:49:45,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:49:45,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:45,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:49:45,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:49:45,311 INFO 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 17:49:45,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544974121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:45,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:45,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:49:45,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475771484] [2021-07-09 17:49:45,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:49:45,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:45,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:49:45,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:49:45,313 INFO L87 Difference]: Start difference. First operand 569 states and 2075 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:46,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:46,664 INFO L93 Difference]: Finished difference Result 2058 states and 7632 transitions. [2021-07-09 17:49:46,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:49:46,665 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:49:46,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:46,672 INFO L225 Difference]: With dead ends: 2058 [2021-07-09 17:49:46,672 INFO L226 Difference]: Without dead ends: 1785 [2021-07-09 17:49:46,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 984.2ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:49:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-07-09 17:49:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 654. [2021-07-09 17:49:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 3.7304747320061256) internal successors, (2436), 653 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 2436 transitions. [2021-07-09 17:49:46,696 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 2436 transitions. Word has length 26 [2021-07-09 17:49:46,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:46,696 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 2436 transitions. [2021-07-09 17:49:46,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:46,696 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 2436 transitions. [2021-07-09 17:49:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:46,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:46,698 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:46,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:46,921 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1149261336, now seen corresponding path program 3 times [2021-07-09 17:49:46,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:46,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704207083] [2021-07-09 17:49:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:47,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:47,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704207083] [2021-07-09 17:49:47,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704207083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:47,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087468902] [2021-07-09 17:49:47,035 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 17:49:47,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:49:47,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:49:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:47,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:47,190 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 17:49:47,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:49:47,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:47,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:49:47,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:49:47,339 INFO 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 17:49:47,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087468902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:47,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:47,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:49:47,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322875285] [2021-07-09 17:49:47,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:49:47,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:47,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:49:47,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:49:47,341 INFO L87 Difference]: Start difference. First operand 654 states and 2436 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:48,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:48,623 INFO L93 Difference]: Finished difference Result 2227 states and 8282 transitions. [2021-07-09 17:49:48,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:49:48,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:49:48,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:48,631 INFO L225 Difference]: With dead ends: 2227 [2021-07-09 17:49:48,631 INFO L226 Difference]: Without dead ends: 1955 [2021-07-09 17:49:48,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 896.7ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:49:48,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2021-07-09 17:49:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 695. [2021-07-09 17:49:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.80835734870317) internal successors, (2643), 694 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2643 transitions. [2021-07-09 17:49:48,657 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2643 transitions. Word has length 26 [2021-07-09 17:49:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:48,657 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2643 transitions. [2021-07-09 17:49:48,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2643 transitions. [2021-07-09 17:49:48,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:48,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:48,659 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:48,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:48,882 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:48,882 INFO L82 PathProgramCache]: Analyzing trace with hash -573555838, now seen corresponding path program 2 times [2021-07-09 17:49:48,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:48,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424244856] [2021-07-09 17:49:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:48,988 INFO 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 17:49:48,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:48,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424244856] [2021-07-09 17:49:48,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424244856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:48,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436111221] [2021-07-09 17:49:48,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:49:49,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:49,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:49,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:49:49,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:49,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:49,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:49:49,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:49:49,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:49,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:49:49,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:49:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:49,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436111221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:49,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:49,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:49:49,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030999651] [2021-07-09 17:49:49,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:49:49,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:49,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:49:49,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:49:49,296 INFO L87 Difference]: Start difference. First operand 695 states and 2643 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:50,464 INFO L93 Difference]: Finished difference Result 1519 states and 5838 transitions. [2021-07-09 17:49:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:49:50,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:49:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:50,471 INFO L225 Difference]: With dead ends: 1519 [2021-07-09 17:49:50,471 INFO L226 Difference]: Without dead ends: 1446 [2021-07-09 17:49:50,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 836.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:49:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-07-09 17:49:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 706. [2021-07-09 17:49:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.819858156028369) internal successors, (2693), 705 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2693 transitions. [2021-07-09 17:49:50,496 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2693 transitions. Word has length 26 [2021-07-09 17:49:50,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:50,497 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2693 transitions. [2021-07-09 17:49:50,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2693 transitions. [2021-07-09 17:49:50,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:50,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:50,499 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:50,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:49:50,714 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:50,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:50,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1969142914, now seen corresponding path program 3 times [2021-07-09 17:49:50,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:50,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912097925] [2021-07-09 17:49:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:50,836 INFO 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 17:49:50,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:50,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912097925] [2021-07-09 17:49:50,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912097925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:50,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675844481] [2021-07-09 17:49:50,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:50,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:49:50,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:49:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:51,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:51,002 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 17:49:51,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:49:51,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:51,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:49:51,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:49:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:51,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675844481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:51,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:51,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:49:51,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317738560] [2021-07-09 17:49:51,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:49:51,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:51,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:49:51,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:49:51,159 INFO L87 Difference]: Start difference. First operand 706 states and 2693 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:52,484 INFO L93 Difference]: Finished difference Result 1567 states and 6047 transitions. [2021-07-09 17:49:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:49:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:49:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:52,492 INFO L225 Difference]: With dead ends: 1567 [2021-07-09 17:49:52,493 INFO L226 Difference]: Without dead ends: 1484 [2021-07-09 17:49:52,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 969.8ms TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:49:52,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-07-09 17:49:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 704. [2021-07-09 17:49:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 3.8207681365576103) internal successors, (2686), 703 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:52,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2686 transitions. [2021-07-09 17:49:52,528 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2686 transitions. Word has length 26 [2021-07-09 17:49:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:52,529 INFO L482 AbstractCegarLoop]: Abstraction has 704 states and 2686 transitions. [2021-07-09 17:49:52,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2686 transitions. [2021-07-09 17:49:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:52,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:52,532 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] [2021-07-09 17:49:52,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:52,755 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:52,755 INFO L82 PathProgramCache]: Analyzing trace with hash 840343866, now seen corresponding path program 1 times [2021-07-09 17:49:52,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:52,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827223140] [2021-07-09 17:49:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:52,836 INFO 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 17:49:52,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:52,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827223140] [2021-07-09 17:49:52,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827223140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:52,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177190477] [2021-07-09 17:49:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:52,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:49:52,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:52,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:52,976 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 17:49:52,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:52,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:52,994 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 17:49:52,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:49:53,048 INFO 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 17:49:53,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177190477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:53,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:53,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:49:53,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091359195] [2021-07-09 17:49:53,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:49:53,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:53,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:49:53,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:49:53,050 INFO L87 Difference]: Start difference. First operand 704 states and 2686 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:53,253 INFO L93 Difference]: Finished difference Result 1121 states and 4306 transitions. [2021-07-09 17:49:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:49:53,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:49:53,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:53,257 INFO L225 Difference]: With dead ends: 1121 [2021-07-09 17:49:53,257 INFO L226 Difference]: Without dead ends: 1039 [2021-07-09 17:49:53,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:49:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-07-09 17:49:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 733. [2021-07-09 17:49:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.8278688524590163) internal successors, (2802), 732 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2802 transitions. [2021-07-09 17:49:53,278 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2802 transitions. Word has length 26 [2021-07-09 17:49:53,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:53,278 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2802 transitions. [2021-07-09 17:49:53,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:53,278 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2802 transitions. [2021-07-09 17:49:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:53,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:53,281 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:53,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:49:53,482 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:53,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:53,482 INFO L82 PathProgramCache]: Analyzing trace with hash -235916034, now seen corresponding path program 2 times [2021-07-09 17:49:53,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:53,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9766117] [2021-07-09 17:49:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:53,586 INFO 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 17:49:53,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:53,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9766117] [2021-07-09 17:49:53,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9766117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:53,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826226834] [2021-07-09 17:49:53,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:53,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:53,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:53,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:49:53,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:53,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:53,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-09 17:49:53,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:49:53,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:53,764 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 17:49:53,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-07-09 17:49:53,904 INFO 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 17:49:53,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826226834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:53,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:53,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:49:53,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250851263] [2021-07-09 17:49:53,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:49:53,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:53,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:49:53,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:49:53,906 INFO L87 Difference]: Start difference. First operand 733 states and 2802 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:54,684 INFO L93 Difference]: Finished difference Result 1208 states and 4645 transitions. [2021-07-09 17:49:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:49:54,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:49:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:54,688 INFO L225 Difference]: With dead ends: 1208 [2021-07-09 17:49:54,688 INFO L226 Difference]: Without dead ends: 1135 [2021-07-09 17:49:54,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 607.3ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:49:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-07-09 17:49:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 731. [2021-07-09 17:49:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.828767123287671) internal successors, (2795), 730 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2795 transitions. [2021-07-09 17:49:54,708 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2795 transitions. Word has length 26 [2021-07-09 17:49:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:54,708 INFO L482 AbstractCegarLoop]: Abstraction has 731 states and 2795 transitions. [2021-07-09 17:49:54,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2795 transitions. [2021-07-09 17:49:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:54,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:54,711 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:54,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:49:54,925 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:54,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:54,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1995337340, now seen corresponding path program 1 times [2021-07-09 17:49:54,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:54,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262537368] [2021-07-09 17:49:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:55,034 INFO 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 17:49:55,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:55,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262537368] [2021-07-09 17:49:55,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262537368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:55,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155081770] [2021-07-09 17:49:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:55,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:49:55,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:55,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:55,177 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 17:49:55,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:55,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:55,186 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 17:49:55,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:49:55,245 INFO 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 17:49:55,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155081770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:55,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:55,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:49:55,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271803181] [2021-07-09 17:49:55,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:49:55,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:55,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:49:55,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:49:55,246 INFO L87 Difference]: Start difference. First operand 731 states and 2795 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:55,513 INFO L93 Difference]: Finished difference Result 1082 states and 4150 transitions. [2021-07-09 17:49:55,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:49:55,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:49:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:55,516 INFO L225 Difference]: With dead ends: 1082 [2021-07-09 17:49:55,517 INFO L226 Difference]: Without dead ends: 1009 [2021-07-09 17:49:55,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:49:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-07-09 17:49:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 740. [2021-07-09 17:49:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.8335588633288227) internal successors, (2833), 739 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2833 transitions. [2021-07-09 17:49:55,535 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2833 transitions. Word has length 26 [2021-07-09 17:49:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:55,535 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2833 transitions. [2021-07-09 17:49:55,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2833 transitions. [2021-07-09 17:49:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:55,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:55,537 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:55,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:55,753 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash -773558878, now seen corresponding path program 2 times [2021-07-09 17:49:55,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:55,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682201443] [2021-07-09 17:49:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:55,858 INFO 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 17:49:55,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:55,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682201443] [2021-07-09 17:49:55,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682201443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:55,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018849759] [2021-07-09 17:49:55,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:49:55,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:55,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:55,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:49:55,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:55,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:55,988 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 17:49:55,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:49:56,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:56,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:49:56,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-07-09 17:49:56,137 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 17:49:56,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018849759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:56,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:56,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:49:56,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420500823] [2021-07-09 17:49:56,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:49:56,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:56,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:49:56,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:49:56,138 INFO L87 Difference]: Start difference. First operand 740 states and 2833 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:56,829 INFO L93 Difference]: Finished difference Result 1158 states and 4457 transitions. [2021-07-09 17:49:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:49:56,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:49:56,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:56,832 INFO L225 Difference]: With dead ends: 1158 [2021-07-09 17:49:56,832 INFO L226 Difference]: Without dead ends: 1083 [2021-07-09 17:49:56,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 614.5ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:49:56,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-07-09 17:49:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 736. [2021-07-09 17:49:56,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.83265306122449) internal successors, (2817), 735 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2817 transitions. [2021-07-09 17:49:56,851 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2817 transitions. Word has length 26 [2021-07-09 17:49:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:56,851 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2817 transitions. [2021-07-09 17:49:56,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2817 transitions. [2021-07-09 17:49:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:56,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:56,853 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:57,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 17:49:57,076 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:57,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1105227200, now seen corresponding path program 3 times [2021-07-09 17:49:57,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:57,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264301524] [2021-07-09 17:49:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:57,186 INFO 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 17:49:57,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:57,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264301524] [2021-07-09 17:49:57,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264301524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:57,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41474217] [2021-07-09 17:49:57,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:57,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:49:57,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:57,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:49:57,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:57,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:57,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 17:49:57,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:49:57,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:57,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:49:57,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-07-09 17:49:57,473 INFO 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 17:49:57,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41474217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:57,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:57,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:49:57,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567508390] [2021-07-09 17:49:57,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:49:57,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:57,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:49:57,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:49:57,476 INFO L87 Difference]: Start difference. First operand 736 states and 2817 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:58,121 INFO L93 Difference]: Finished difference Result 1194 states and 4592 transitions. [2021-07-09 17:49:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:49:58,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:49:58,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:58,123 INFO L225 Difference]: With dead ends: 1194 [2021-07-09 17:49:58,123 INFO L226 Difference]: Without dead ends: 1123 [2021-07-09 17:49:58,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 468.4ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-07-09 17:49:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 760. [2021-07-09 17:49:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.8194993412384717) internal successors, (2899), 759 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2899 transitions. [2021-07-09 17:49:58,141 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2899 transitions. Word has length 26 [2021-07-09 17:49:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:58,141 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2899 transitions. [2021-07-09 17:49:58,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2899 transitions. [2021-07-09 17:49:58,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:58,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:58,143 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:58,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:58,343 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:58,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:58,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1970882652, now seen corresponding path program 3 times [2021-07-09 17:49:58,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:58,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535269782] [2021-07-09 17:49:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:58,429 INFO 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 17:49:58,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:58,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535269782] [2021-07-09 17:49:58,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535269782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:58,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321001504] [2021-07-09 17:49:58,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:58,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:49:58,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:58,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:49:58,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:58,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:58,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 17:49:58,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:49:58,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:58,647 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 17:49:58,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-07-09 17:49:58,747 INFO 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 17:49:58,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321001504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:58,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:58,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:49:58,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071323371] [2021-07-09 17:49:58,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:49:58,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:58,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:49:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:49:58,748 INFO L87 Difference]: Start difference. First operand 760 states and 2899 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:59,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:59,423 INFO L93 Difference]: Finished difference Result 1244 states and 4764 transitions. [2021-07-09 17:49:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:49:59,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:49:59,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:59,430 INFO L225 Difference]: With dead ends: 1244 [2021-07-09 17:49:59,430 INFO L226 Difference]: Without dead ends: 1173 [2021-07-09 17:49:59,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:49:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-07-09 17:49:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 736. [2021-07-09 17:49:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.83265306122449) internal successors, (2817), 735 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2817 transitions. [2021-07-09 17:49:59,450 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2817 transitions. Word has length 26 [2021-07-09 17:49:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:59,451 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2817 transitions. [2021-07-09 17:49:59,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2817 transitions. [2021-07-09 17:49:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:49:59,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:59,453 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] [2021-07-09 17:49:59,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 17:49:59,669 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash 197192494, now seen corresponding path program 4 times [2021-07-09 17:49:59,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:59,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450057617] [2021-07-09 17:49:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:59,771 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 17:49:59,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:59,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450057617] [2021-07-09 17:49:59,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450057617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:59,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840629457] [2021-07-09 17:49:59,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:59,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:59,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:59,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:49:59,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:59,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:59,895 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 17:49:59,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:59,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:59,902 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 17:49:59,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-09 17:49:59,947 INFO 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 17:49:59,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840629457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:59,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:59,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:49:59,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318832367] [2021-07-09 17:49:59,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:49:59,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:59,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:49:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:49:59,948 INFO L87 Difference]: Start difference. First operand 736 states and 2817 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:00,299 INFO L93 Difference]: Finished difference Result 1414 states and 5349 transitions. [2021-07-09 17:50:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:50:00,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:00,302 INFO L225 Difference]: With dead ends: 1414 [2021-07-09 17:50:00,302 INFO L226 Difference]: Without dead ends: 1323 [2021-07-09 17:50:00,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:50:00,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-07-09 17:50:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 814. [2021-07-09 17:50:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.88929889298893) internal successors, (3162), 813 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 3162 transitions. [2021-07-09 17:50:00,322 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 3162 transitions. Word has length 26 [2021-07-09 17:50:00,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:00,323 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 3162 transitions. [2021-07-09 17:50:00,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 3162 transitions. [2021-07-09 17:50:00,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:00,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:00,325 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:00,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 17:50:00,541 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:00,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:00,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1571037912, now seen corresponding path program 4 times [2021-07-09 17:50:00,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:00,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838399043] [2021-07-09 17:50:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:00,651 INFO 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 17:50:00,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:00,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838399043] [2021-07-09 17:50:00,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838399043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:00,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757846175] [2021-07-09 17:50:00,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:00,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:00,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:00,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:00,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:00,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:00,776 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 17:50:00,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:00,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:00,785 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 17:50:00,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-09 17:50:00,835 INFO 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 17:50:00,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757846175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:00,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:00,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:00,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500553122] [2021-07-09 17:50:00,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:00,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:00,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:00,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:00,838 INFO L87 Difference]: Start difference. First operand 814 states and 3162 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:01,124 INFO L93 Difference]: Finished difference Result 1224 states and 4746 transitions. [2021-07-09 17:50:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:01,125 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:01,127 INFO L225 Difference]: With dead ends: 1224 [2021-07-09 17:50:01,127 INFO L226 Difference]: Without dead ends: 1142 [2021-07-09 17:50:01,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-07-09 17:50:01,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 814. [2021-07-09 17:50:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.88929889298893) internal successors, (3162), 813 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 3162 transitions. [2021-07-09 17:50:01,145 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 3162 transitions. Word has length 26 [2021-07-09 17:50:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:01,145 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 3162 transitions. [2021-07-09 17:50:01,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 3162 transitions. [2021-07-09 17:50:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:01,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:01,147 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:01,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 17:50:01,369 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:01,369 INFO L82 PathProgramCache]: Analyzing trace with hash 112793720, now seen corresponding path program 5 times [2021-07-09 17:50:01,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:01,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028383658] [2021-07-09 17:50:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:01,485 INFO 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 17:50:01,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:01,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028383658] [2021-07-09 17:50:01,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028383658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:01,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558704707] [2021-07-09 17:50:01,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:01,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:50:01,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:01,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:01,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:01,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:50:01,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:01,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:01,606 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 17:50:01,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:01,666 INFO 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 17:50:01,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558704707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:01,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:01,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:01,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121158626] [2021-07-09 17:50:01,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:01,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:01,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:01,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:01,668 INFO L87 Difference]: Start difference. First operand 814 states and 3162 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:01,989 INFO L93 Difference]: Finished difference Result 1332 states and 5142 transitions. [2021-07-09 17:50:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:50:01,989 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:01,991 INFO L225 Difference]: With dead ends: 1332 [2021-07-09 17:50:01,991 INFO L226 Difference]: Without dead ends: 1241 [2021-07-09 17:50:01,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:50:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-07-09 17:50:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 832. [2021-07-09 17:50:02,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.931407942238267) internal successors, (3267), 831 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 3267 transitions. [2021-07-09 17:50:02,012 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 3267 transitions. Word has length 26 [2021-07-09 17:50:02,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:02,012 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 3267 transitions. [2021-07-09 17:50:02,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 3267 transitions. [2021-07-09 17:50:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:02,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:02,015 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] [2021-07-09 17:50:02,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-09 17:50:02,229 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:02,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1004083728, now seen corresponding path program 6 times [2021-07-09 17:50:02,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:02,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562709784] [2021-07-09 17:50:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:02,353 INFO 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 17:50:02,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:02,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562709784] [2021-07-09 17:50:02,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562709784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:02,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282295123] [2021-07-09 17:50:02,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:02,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:50:02,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:02,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:02,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:02,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:02,455 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 17:50:02,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:02,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:02,470 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 17:50:02,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-07-09 17:50:02,563 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 17:50:02,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282295123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:02,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:02,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:50:02,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345676487] [2021-07-09 17:50:02,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:50:02,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:02,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:50:02,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:50:02,564 INFO L87 Difference]: Start difference. First operand 832 states and 3267 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:03,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:03,522 INFO L93 Difference]: Finished difference Result 1857 states and 7226 transitions. [2021-07-09 17:50:03,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:50:03,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:03,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:03,527 INFO L225 Difference]: With dead ends: 1857 [2021-07-09 17:50:03,527 INFO L226 Difference]: Without dead ends: 1694 [2021-07-09 17:50:03,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 685.4ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:50:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-07-09 17:50:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 856. [2021-07-09 17:50:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.9742690058479533) internal successors, (3398), 855 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 3398 transitions. [2021-07-09 17:50:03,549 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 3398 transitions. Word has length 26 [2021-07-09 17:50:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:03,549 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 3398 transitions. [2021-07-09 17:50:03,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 3398 transitions. [2021-07-09 17:50:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:03,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:03,551 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:03,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:03,754 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:03,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1269539716, now seen corresponding path program 5 times [2021-07-09 17:50:03,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:03,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641944326] [2021-07-09 17:50:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:03,838 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 17:50:03,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:03,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641944326] [2021-07-09 17:50:03,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641944326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:03,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717159242] [2021-07-09 17:50:03,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:03,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:03,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:03,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:03,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:03,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:03,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:50:03,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:03,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:03,954 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 17:50:03,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:04,013 INFO 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 17:50:04,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717159242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:04,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:04,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:04,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564873335] [2021-07-09 17:50:04,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:04,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:04,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:04,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:04,014 INFO L87 Difference]: Start difference. First operand 856 states and 3398 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:04,280 INFO L93 Difference]: Finished difference Result 1245 states and 4901 transitions. [2021-07-09 17:50:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:04,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:04,283 INFO L225 Difference]: With dead ends: 1245 [2021-07-09 17:50:04,283 INFO L226 Difference]: Without dead ends: 1163 [2021-07-09 17:50:04,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:04,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-07-09 17:50:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 865. [2021-07-09 17:50:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.9756944444444446) internal successors, (3435), 864 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 3435 transitions. [2021-07-09 17:50:04,303 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 3435 transitions. Word has length 26 [2021-07-09 17:50:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:04,304 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 3435 transitions. [2021-07-09 17:50:04,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 3435 transitions. [2021-07-09 17:50:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:04,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:04,306 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:04,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-09 17:50:04,529 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:04,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1287685744, now seen corresponding path program 6 times [2021-07-09 17:50:04,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:04,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066323073] [2021-07-09 17:50:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:04,611 INFO 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 17:50:04,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:04,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066323073] [2021-07-09 17:50:04,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066323073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:04,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73272891] [2021-07-09 17:50:04,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:04,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:50:04,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:04,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:04,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:04,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:04,720 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 17:50:04,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:04,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:04,736 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 17:50:04,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-07-09 17:50:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:04,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73272891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:04,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:04,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:50:04,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846986180] [2021-07-09 17:50:04,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:50:04,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:04,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:50:04,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:50:04,850 INFO L87 Difference]: Start difference. First operand 865 states and 3435 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:06,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:06,131 INFO L93 Difference]: Finished difference Result 1646 states and 6434 transitions. [2021-07-09 17:50:06,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:50:06,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:06,135 INFO L225 Difference]: With dead ends: 1646 [2021-07-09 17:50:06,135 INFO L226 Difference]: Without dead ends: 1573 [2021-07-09 17:50:06,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 925.9ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:50:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-07-09 17:50:06,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 856. [2021-07-09 17:50:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.9742690058479533) internal successors, (3398), 855 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 3398 transitions. [2021-07-09 17:50:06,158 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 3398 transitions. Word has length 26 [2021-07-09 17:50:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:06,158 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 3398 transitions. [2021-07-09 17:50:06,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 3398 transitions. [2021-07-09 17:50:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:06,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:06,160 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:06,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 17:50:06,368 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:06,368 INFO L82 PathProgramCache]: Analyzing trace with hash -248765392, now seen corresponding path program 4 times [2021-07-09 17:50:06,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:06,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179782027] [2021-07-09 17:50:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:06,445 INFO 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 17:50:06,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:06,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179782027] [2021-07-09 17:50:06,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179782027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:06,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963929104] [2021-07-09 17:50:06,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:06,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:06,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:06,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:06,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:06,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:06,550 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 17:50:06,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:06,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:06,560 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 17:50:06,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-09 17:50:06,613 INFO 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 17:50:06,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963929104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:06,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:06,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:06,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315663070] [2021-07-09 17:50:06,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:06,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:06,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:06,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:06,614 INFO L87 Difference]: Start difference. First operand 856 states and 3398 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:06,834 INFO L93 Difference]: Finished difference Result 1278 states and 4997 transitions. [2021-07-09 17:50:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:06,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:06,837 INFO L225 Difference]: With dead ends: 1278 [2021-07-09 17:50:06,837 INFO L226 Difference]: Without dead ends: 1205 [2021-07-09 17:50:06,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-07-09 17:50:06,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 892. [2021-07-09 17:50:06,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.9551066217732886) internal successors, (3524), 891 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3524 transitions. [2021-07-09 17:50:06,852 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3524 transitions. Word has length 26 [2021-07-09 17:50:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:06,852 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3524 transitions. [2021-07-09 17:50:06,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3524 transitions. [2021-07-09 17:50:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:06,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:06,855 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:07,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:07,061 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:07,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:07,061 INFO L82 PathProgramCache]: Analyzing trace with hash -63771734, now seen corresponding path program 4 times [2021-07-09 17:50:07,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:07,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115932922] [2021-07-09 17:50:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:07,160 INFO 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 17:50:07,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:07,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115932922] [2021-07-09 17:50:07,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115932922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:07,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184691158] [2021-07-09 17:50:07,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:07,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:07,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:07,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:07,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:07,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:07,276 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 17:50:07,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:07,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:07,284 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 17:50:07,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-09 17:50:07,323 INFO 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 17:50:07,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184691158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:07,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:07,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:50:07,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894073360] [2021-07-09 17:50:07,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:07,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:07,325 INFO L87 Difference]: Start difference. First operand 892 states and 3524 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:07,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:07,613 INFO L93 Difference]: Finished difference Result 1234 states and 4842 transitions. [2021-07-09 17:50:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:07,614 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:07,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:07,617 INFO L225 Difference]: With dead ends: 1234 [2021-07-09 17:50:07,617 INFO L226 Difference]: Without dead ends: 1161 [2021-07-09 17:50:07,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:50:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-07-09 17:50:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 868. [2021-07-09 17:50:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-07-09 17:50:07,637 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-07-09 17:50:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:07,637 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-07-09 17:50:07,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-07-09 17:50:07,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:07,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:07,639 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:07,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 17:50:07,862 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1223906964, now seen corresponding path program 5 times [2021-07-09 17:50:07,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:07,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935128479] [2021-07-09 17:50:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:07,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:07,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935128479] [2021-07-09 17:50:07,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935128479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:07,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58902801] [2021-07-09 17:50:07,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:08,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:08,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:08,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:08,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:08,060 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 17:50:08,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:08,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:08,069 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 17:50:08,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:08,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58902801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:08,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:08,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:08,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950750707] [2021-07-09 17:50:08,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:08,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:08,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:08,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:08,129 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:08,401 INFO L93 Difference]: Finished difference Result 1243 states and 4884 transitions. [2021-07-09 17:50:08,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:08,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:08,403 INFO L225 Difference]: With dead ends: 1243 [2021-07-09 17:50:08,404 INFO L226 Difference]: Without dead ends: 1170 [2021-07-09 17:50:08,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:08,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-07-09 17:50:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 877. [2021-07-09 17:50:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.9817351598173514) internal successors, (3488), 876 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3488 transitions. [2021-07-09 17:50:08,418 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3488 transitions. Word has length 26 [2021-07-09 17:50:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:08,418 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 3488 transitions. [2021-07-09 17:50:08,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3488 transitions. [2021-07-09 17:50:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:08,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:08,421 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:08,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:08,621 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:08,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1537433360, now seen corresponding path program 6 times [2021-07-09 17:50:08,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:08,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452196870] [2021-07-09 17:50:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:08,692 INFO 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 17:50:08,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:08,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452196870] [2021-07-09 17:50:08,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452196870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:08,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427617718] [2021-07-09 17:50:08,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:08,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:50:08,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:08,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:08,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:08,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:50:08,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:08,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:08,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:08,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:50:08,942 INFO 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 17:50:08,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427617718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:08,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:08,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:50:08,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879673810] [2021-07-09 17:50:08,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:50:08,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:08,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:50:08,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:08,943 INFO L87 Difference]: Start difference. First operand 877 states and 3488 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:09,826 INFO L93 Difference]: Finished difference Result 1415 states and 5519 transitions. [2021-07-09 17:50:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:50:09,827 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:09,829 INFO L225 Difference]: With dead ends: 1415 [2021-07-09 17:50:09,829 INFO L226 Difference]: Without dead ends: 1332 [2021-07-09 17:50:09,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 627.8ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:50:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-07-09 17:50:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 868. [2021-07-09 17:50:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-07-09 17:50:09,849 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-07-09 17:50:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:09,849 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-07-09 17:50:09,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-07-09 17:50:09,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:09,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:09,852 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:10,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 17:50:10,065 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:10,065 INFO L82 PathProgramCache]: Analyzing trace with hash 642756650, now seen corresponding path program 5 times [2021-07-09 17:50:10,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:10,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389013443] [2021-07-09 17:50:10,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:10,143 INFO 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 17:50:10,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:10,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389013443] [2021-07-09 17:50:10,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389013443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:10,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409987762] [2021-07-09 17:50:10,144 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 17:50:10,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:10,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:10,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:10,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:10,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:10,274 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 17:50:10,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:10,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:10,287 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 17:50:10,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:10,347 INFO 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 17:50:10,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409987762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:10,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:10,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:10,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117351214] [2021-07-09 17:50:10,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:10,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:10,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:10,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:10,348 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:10,591 INFO L93 Difference]: Finished difference Result 1197 states and 4721 transitions. [2021-07-09 17:50:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:10,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:10,594 INFO L225 Difference]: With dead ends: 1197 [2021-07-09 17:50:10,594 INFO L226 Difference]: Without dead ends: 1124 [2021-07-09 17:50:10,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-07-09 17:50:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 877. [2021-07-09 17:50:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.982876712328767) internal successors, (3489), 876 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3489 transitions. [2021-07-09 17:50:10,627 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3489 transitions. Word has length 26 [2021-07-09 17:50:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:10,627 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 3489 transitions. [2021-07-09 17:50:10,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3489 transitions. [2021-07-09 17:50:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:10,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:10,629 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:10,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:10,830 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:10,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1470280500, now seen corresponding path program 6 times [2021-07-09 17:50:10,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:10,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755133993] [2021-07-09 17:50:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:10,911 INFO 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 17:50:10,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:10,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755133993] [2021-07-09 17:50:10,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755133993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:10,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991269666] [2021-07-09 17:50:10,912 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 17:50:10,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:50:10,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:10,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:10,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:11,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:11,037 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 17:50:11,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:11,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:11,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:11,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:50:11,184 INFO 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 17:50:11,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991269666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:11,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:11,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:50:11,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030056194] [2021-07-09 17:50:11,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:50:11,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:11,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:50:11,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:11,185 INFO L87 Difference]: Start difference. First operand 877 states and 3489 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:11,981 INFO L93 Difference]: Finished difference Result 1349 states and 5259 transitions. [2021-07-09 17:50:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:50:11,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:11,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:11,986 INFO L225 Difference]: With dead ends: 1349 [2021-07-09 17:50:11,986 INFO L226 Difference]: Without dead ends: 1274 [2021-07-09 17:50:11,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 610.2ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:50:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-07-09 17:50:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 868. [2021-07-09 17:50:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-07-09 17:50:12,006 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-07-09 17:50:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:12,006 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-07-09 17:50:12,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-07-09 17:50:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:12,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:12,008 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:12,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-09 17:50:12,226 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:12,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:12,227 INFO L82 PathProgramCache]: Analyzing trace with hash 672248968, now seen corresponding path program 7 times [2021-07-09 17:50:12,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:12,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587210575] [2021-07-09 17:50:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:12,334 INFO 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 17:50:12,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:12,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587210575] [2021-07-09 17:50:12,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587210575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:12,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449602404] [2021-07-09 17:50:12,335 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 17:50:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:12,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:12,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:12,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:12,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:50:12,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:12,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:12,509 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 17:50:12,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:50:12,543 INFO 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 17:50:12,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449602404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:12,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:12,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:50:12,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717072587] [2021-07-09 17:50:12,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:12,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:12,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:12,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:12,544 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:12,875 INFO L93 Difference]: Finished difference Result 1481 states and 5795 transitions. [2021-07-09 17:50:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:50:12,877 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:12,880 INFO L225 Difference]: With dead ends: 1481 [2021-07-09 17:50:12,880 INFO L226 Difference]: Without dead ends: 1400 [2021-07-09 17:50:12,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:50:12,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-07-09 17:50:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 910. [2021-07-09 17:50:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.957095709570957) internal successors, (3597), 909 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3597 transitions. [2021-07-09 17:50:12,897 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3597 transitions. Word has length 26 [2021-07-09 17:50:12,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:12,897 INFO L482 AbstractCegarLoop]: Abstraction has 910 states and 3597 transitions. [2021-07-09 17:50:12,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:12,897 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3597 transitions. [2021-07-09 17:50:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:12,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:12,899 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:13,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:13,100 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:13,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:13,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1976988362, now seen corresponding path program 7 times [2021-07-09 17:50:13,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:13,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556331972] [2021-07-09 17:50:13,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:13,204 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 17:50:13,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:13,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556331972] [2021-07-09 17:50:13,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556331972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:13,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23778378] [2021-07-09 17:50:13,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:50:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:13,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:13,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:13,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:13,368 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 17:50:13,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:13,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:13,376 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 17:50:13,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:50:13,415 INFO 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 17:50:13,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23778378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:13,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:13,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:50:13,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763215456] [2021-07-09 17:50:13,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:13,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:13,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:13,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:13,417 INFO L87 Difference]: Start difference. First operand 910 states and 3597 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:13,803 INFO L93 Difference]: Finished difference Result 1431 states and 5615 transitions. [2021-07-09 17:50:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:50:13,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:13,807 INFO L225 Difference]: With dead ends: 1431 [2021-07-09 17:50:13,807 INFO L226 Difference]: Without dead ends: 1350 [2021-07-09 17:50:13,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:50:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-07-09 17:50:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 880. [2021-07-09 17:50:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-07-09 17:50:13,832 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-07-09 17:50:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:13,832 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-07-09 17:50:13,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-07-09 17:50:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:13,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:13,834 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:14,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 17:50:14,057 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:14,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:14,057 INFO L82 PathProgramCache]: Analyzing trace with hash 491359750, now seen corresponding path program 8 times [2021-07-09 17:50:14,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:14,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690580131] [2021-07-09 17:50:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:14,182 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 17:50:14,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:14,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690580131] [2021-07-09 17:50:14,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690580131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:14,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491036807] [2021-07-09 17:50:14,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:14,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:14,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:14,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:14,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:14,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:14,291 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 17:50:14,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:14,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:14,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:14,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:50:14,449 INFO 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 17:50:14,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491036807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:14,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:14,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:50:14,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398545067] [2021-07-09 17:50:14,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:50:14,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:14,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:50:14,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:50:14,451 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:15,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:15,904 INFO L93 Difference]: Finished difference Result 2510 states and 9509 transitions. [2021-07-09 17:50:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:50:15,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:15,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:15,909 INFO L225 Difference]: With dead ends: 2510 [2021-07-09 17:50:15,910 INFO L226 Difference]: Without dead ends: 2237 [2021-07-09 17:50:15,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1097.5ms TimeCoverageRelationStatistics Valid=363, Invalid=1529, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:50:15,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-07-09 17:50:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 886. [2021-07-09 17:50:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.977401129943503) internal successors, (3520), 885 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:15,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3520 transitions. [2021-07-09 17:50:15,929 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3520 transitions. Word has length 26 [2021-07-09 17:50:15,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:15,930 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3520 transitions. [2021-07-09 17:50:15,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3520 transitions. [2021-07-09 17:50:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:15,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:15,932 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:16,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:16,133 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:16,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2044131694, now seen corresponding path program 9 times [2021-07-09 17:50:16,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:16,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664589226] [2021-07-09 17:50:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:16,250 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 17:50:16,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:16,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664589226] [2021-07-09 17:50:16,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664589226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:16,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201064599] [2021-07-09 17:50:16,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:16,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:50:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:16,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:16,378 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 17:50:16,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:16,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:16,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:16,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:50:16,523 INFO 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 17:50:16,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201064599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:16,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:16,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:50:16,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999894353] [2021-07-09 17:50:16,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:50:16,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:16,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:50:16,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:50:16,525 INFO L87 Difference]: Start difference. First operand 886 states and 3520 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:17,916 INFO L93 Difference]: Finished difference Result 2599 states and 9825 transitions. [2021-07-09 17:50:17,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:50:17,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:17,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:17,921 INFO L225 Difference]: With dead ends: 2599 [2021-07-09 17:50:17,921 INFO L226 Difference]: Without dead ends: 2327 [2021-07-09 17:50:17,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1103.0ms TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:50:17,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-07-09 17:50:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 880. [2021-07-09 17:50:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-07-09 17:50:17,940 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-07-09 17:50:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:17,940 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-07-09 17:50:17,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-07-09 17:50:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:17,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:17,942 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:18,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 17:50:18,143 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:18,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1675130104, now seen corresponding path program 8 times [2021-07-09 17:50:18,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:18,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312021772] [2021-07-09 17:50:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:18,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:18,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312021772] [2021-07-09 17:50:18,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312021772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:18,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16886389] [2021-07-09 17:50:18,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:50:18,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:18,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:18,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:18,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:18,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:18,315 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 17:50:18,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:18,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:18,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:18,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:50:18,432 INFO 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 17:50:18,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16886389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:18,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:18,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:50:18,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681521830] [2021-07-09 17:50:18,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:50:18,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:18,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:50:18,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:18,434 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:19,630 INFO L93 Difference]: Finished difference Result 1683 states and 6604 transitions. [2021-07-09 17:50:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:50:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:19,635 INFO L225 Difference]: With dead ends: 1683 [2021-07-09 17:50:19,635 INFO L226 Difference]: Without dead ends: 1610 [2021-07-09 17:50:19,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 828.0ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:50:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-07-09 17:50:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 889. [2021-07-09 17:50:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.975225225225225) internal successors, (3530), 888 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3530 transitions. [2021-07-09 17:50:19,652 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3530 transitions. Word has length 26 [2021-07-09 17:50:19,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:19,652 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3530 transitions. [2021-07-09 17:50:19,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3530 transitions. [2021-07-09 17:50:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:19,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:19,654 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:19,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-09 17:50:19,855 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:19,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1224250116, now seen corresponding path program 9 times [2021-07-09 17:50:19,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:19,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96023337] [2021-07-09 17:50:19,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:19,938 INFO 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 17:50:19,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:19,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96023337] [2021-07-09 17:50:19,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96023337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:19,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684435770] [2021-07-09 17:50:19,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:19,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:50:19,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:19,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:19,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:20,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:20,061 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-09 17:50:20,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:20,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:20,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:20,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:50:20,187 INFO 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 17:50:20,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684435770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:20,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:20,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:50:20,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313007802] [2021-07-09 17:50:20,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:50:20,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:20,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:50:20,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:20,188 INFO L87 Difference]: Start difference. First operand 889 states and 3530 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:21,294 INFO L93 Difference]: Finished difference Result 1683 states and 6635 transitions. [2021-07-09 17:50:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:50:21,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:21,298 INFO L225 Difference]: With dead ends: 1683 [2021-07-09 17:50:21,298 INFO L226 Difference]: Without dead ends: 1600 [2021-07-09 17:50:21,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 828.7ms TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:50:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-07-09 17:50:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 871. [2021-07-09 17:50:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.9770114942528734) internal successors, (3460), 870 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 3460 transitions. [2021-07-09 17:50:21,314 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 3460 transitions. Word has length 26 [2021-07-09 17:50:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:21,314 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 3460 transitions. [2021-07-09 17:50:21,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 3460 transitions. [2021-07-09 17:50:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:21,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:21,316 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:21,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:21,517 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:21,517 INFO L82 PathProgramCache]: Analyzing trace with hash 795267296, now seen corresponding path program 10 times [2021-07-09 17:50:21,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:21,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018633931] [2021-07-09 17:50:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:21,602 INFO 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 17:50:21,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:21,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018633931] [2021-07-09 17:50:21,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018633931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:21,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844514647] [2021-07-09 17:50:21,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:21,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:21,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:21,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:21,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:21,763 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 17:50:21,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:21,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:21,772 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 17:50:21,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:50:21,807 INFO 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 17:50:21,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844514647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:21,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:21,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:50:21,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219824451] [2021-07-09 17:50:21,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:21,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:21,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:21,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:21,809 INFO L87 Difference]: Start difference. First operand 871 states and 3460 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:22,378 INFO L93 Difference]: Finished difference Result 2026 states and 7973 transitions. [2021-07-09 17:50:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:50:22,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:22,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:22,383 INFO L225 Difference]: With dead ends: 2026 [2021-07-09 17:50:22,383 INFO L226 Difference]: Without dead ends: 1945 [2021-07-09 17:50:22,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-07-09 17:50:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 911. [2021-07-09 17:50:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.9472527472527474) internal successors, (3592), 910 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3592 transitions. [2021-07-09 17:50:22,403 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3592 transitions. Word has length 26 [2021-07-09 17:50:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:22,403 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 3592 transitions. [2021-07-09 17:50:22,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3592 transitions. [2021-07-09 17:50:22,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:22,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:22,405 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:22,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 17:50:22,606 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:22,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2100006690, now seen corresponding path program 10 times [2021-07-09 17:50:22,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:22,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025642054] [2021-07-09 17:50:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:22,724 INFO 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 17:50:22,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:22,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025642054] [2021-07-09 17:50:22,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025642054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:22,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023748875] [2021-07-09 17:50:22,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:22,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:22,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:22,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:22,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:22,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 17:50:22,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:22,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:22,934 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 17:50:22,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:50:22,973 INFO 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 17:50:22,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023748875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:22,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:22,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:50:22,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210492084] [2021-07-09 17:50:22,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:22,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:22,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:22,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:22,974 INFO L87 Difference]: Start difference. First operand 911 states and 3592 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:23,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:23,515 INFO L93 Difference]: Finished difference Result 1975 states and 7789 transitions. [2021-07-09 17:50:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:50:23,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:23,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:23,521 INFO L225 Difference]: With dead ends: 1975 [2021-07-09 17:50:23,521 INFO L226 Difference]: Without dead ends: 1894 [2021-07-09 17:50:23,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-07-09 17:50:23,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 881. [2021-07-09 17:50:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.963636363636364) internal successors, (3488), 880 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 3488 transitions. [2021-07-09 17:50:23,540 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 3488 transitions. Word has length 26 [2021-07-09 17:50:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:23,540 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 3488 transitions. [2021-07-09 17:50:23,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 3488 transitions. [2021-07-09 17:50:23,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:23,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:23,542 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:23,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:23,743 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:23,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:23,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1358277036, now seen corresponding path program 7 times [2021-07-09 17:50:23,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:23,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60085013] [2021-07-09 17:50:23,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:23,809 INFO 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 17:50:23,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:23,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60085013] [2021-07-09 17:50:23,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60085013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:23,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374602030] [2021-07-09 17:50:23,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:23,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:23,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:23,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:23,921 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 17:50:23,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:23,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:23,930 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 17:50:23,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:23,979 INFO 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 17:50:23,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374602030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:23,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:23,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:23,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988744954] [2021-07-09 17:50:23,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:23,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:23,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:23,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:23,980 INFO L87 Difference]: Start difference. First operand 881 states and 3488 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:24,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:24,275 INFO L93 Difference]: Finished difference Result 1399 states and 5520 transitions. [2021-07-09 17:50:24,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:50:24,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:24,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:24,278 INFO L225 Difference]: With dead ends: 1399 [2021-07-09 17:50:24,278 INFO L226 Difference]: Without dead ends: 1317 [2021-07-09 17:50:24,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-07-09 17:50:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 902. [2021-07-09 17:50:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9633740288568258) internal successors, (3571), 901 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3571 transitions. [2021-07-09 17:50:24,293 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3571 transitions. Word has length 26 [2021-07-09 17:50:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:24,293 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3571 transitions. [2021-07-09 17:50:24,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3571 transitions. [2021-07-09 17:50:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:24,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:24,295 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:24,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 17:50:24,496 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:24,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1860430360, now seen corresponding path program 8 times [2021-07-09 17:50:24,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:24,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628575995] [2021-07-09 17:50:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:24,563 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 17:50:24,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:24,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628575995] [2021-07-09 17:50:24,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628575995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:24,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970118546] [2021-07-09 17:50:24,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:24,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:24,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:24,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:24,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:24,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:24,723 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 17:50:24,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:24,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:24,741 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 17:50:24,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-07-09 17:50:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:24,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970118546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:24,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:24,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:50:24,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076686596] [2021-07-09 17:50:24,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:24,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:24,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:24,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:24,875 INFO L87 Difference]: Start difference. First operand 902 states and 3571 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:25,641 INFO L93 Difference]: Finished difference Result 1442 states and 5673 transitions. [2021-07-09 17:50:25,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:50:25,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:25,645 INFO L225 Difference]: With dead ends: 1442 [2021-07-09 17:50:25,645 INFO L226 Difference]: Without dead ends: 1369 [2021-07-09 17:50:25,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 584.8ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:50:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-07-09 17:50:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 893. [2021-07-09 17:50:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-07-09 17:50:25,665 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-07-09 17:50:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:25,665 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-07-09 17:50:25,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-07-09 17:50:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:25,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:25,667 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:25,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 17:50:25,890 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash -203283562, now seen corresponding path program 7 times [2021-07-09 17:50:25,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:25,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865399464] [2021-07-09 17:50:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:25,957 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 17:50:25,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865399464] [2021-07-09 17:50:25,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865399464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973795474] [2021-07-09 17:50:25,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:50:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:26,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:26,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:26,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:26,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:50:26,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:26,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:26,113 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 17:50:26,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:26,166 INFO 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 17:50:26,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973795474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:26,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:26,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:26,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734150961] [2021-07-09 17:50:26,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:26,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:26,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:26,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:26,167 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:26,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:26,515 INFO L93 Difference]: Finished difference Result 1337 states and 5270 transitions. [2021-07-09 17:50:26,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:50:26,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:26,518 INFO L225 Difference]: With dead ends: 1337 [2021-07-09 17:50:26,518 INFO L226 Difference]: Without dead ends: 1264 [2021-07-09 17:50:26,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-07-09 17:50:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 902. [2021-07-09 17:50:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9644839067702553) internal successors, (3572), 901 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3572 transitions. [2021-07-09 17:50:26,533 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3572 transitions. Word has length 26 [2021-07-09 17:50:26,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:26,533 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3572 transitions. [2021-07-09 17:50:26,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:26,533 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3572 transitions. [2021-07-09 17:50:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:26,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:26,535 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:26,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:26,735 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:26,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1322787516, now seen corresponding path program 8 times [2021-07-09 17:50:26,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:26,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509992124] [2021-07-09 17:50:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:26,813 INFO 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 17:50:26,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:26,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509992124] [2021-07-09 17:50:26,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509992124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:26,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043793758] [2021-07-09 17:50:26,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:26,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:26,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:26,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:26,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:26,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:26,928 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 17:50:26,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:26,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:26,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:26,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:26,986 INFO 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 17:50:26,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043793758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:26,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:26,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:26,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999572745] [2021-07-09 17:50:26,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:26,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:26,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:26,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:26,987 INFO L87 Difference]: Start difference. First operand 902 states and 3572 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:27,248 INFO L93 Difference]: Finished difference Result 1333 states and 5253 transitions. [2021-07-09 17:50:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:50:27,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:27,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:27,250 INFO L225 Difference]: With dead ends: 1333 [2021-07-09 17:50:27,250 INFO L226 Difference]: Without dead ends: 1258 [2021-07-09 17:50:27,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:50:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-07-09 17:50:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 893. [2021-07-09 17:50:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-07-09 17:50:27,265 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-07-09 17:50:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:27,265 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-07-09 17:50:27,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:27,265 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-07-09 17:50:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:27,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:27,267 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:27,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:27,468 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:27,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1093393702, now seen corresponding path program 9 times [2021-07-09 17:50:27,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:27,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458231143] [2021-07-09 17:50:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:27,536 INFO 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 17:50:27,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:27,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458231143] [2021-07-09 17:50:27,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458231143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:27,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80678781] [2021-07-09 17:50:27,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:27,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:50:27,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:27,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:27,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:27,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:27,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:50:27,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:27,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:27,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:27,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:50:27,724 INFO 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 17:50:27,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80678781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:27,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:27,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:27,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115112583] [2021-07-09 17:50:27,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:27,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:27,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:27,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:27,725 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:28,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:28,066 INFO L93 Difference]: Finished difference Result 1359 states and 5336 transitions. [2021-07-09 17:50:28,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:50:28,067 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:28,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:28,069 INFO L225 Difference]: With dead ends: 1359 [2021-07-09 17:50:28,069 INFO L226 Difference]: Without dead ends: 1288 [2021-07-09 17:50:28,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:50:28,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-07-09 17:50:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 917. [2021-07-09 17:50:28,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.947598253275109) internal successors, (3616), 916 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 3616 transitions. [2021-07-09 17:50:28,086 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 3616 transitions. Word has length 26 [2021-07-09 17:50:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:28,086 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 3616 transitions. [2021-07-09 17:50:28,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 3616 transitions. [2021-07-09 17:50:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:28,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:28,088 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:28,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:28,293 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash -227738250, now seen corresponding path program 9 times [2021-07-09 17:50:28,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:28,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825513700] [2021-07-09 17:50:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:28,374 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 17:50:28,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:28,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825513700] [2021-07-09 17:50:28,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825513700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:28,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127688200] [2021-07-09 17:50:28,375 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 17:50:28,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:50:28,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:28,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:28,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:28,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:28,555 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 17:50:28,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:28,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:28,564 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 17:50:28,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:50:28,601 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 17:50:28,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127688200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:28,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:28,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:50:28,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669888225] [2021-07-09 17:50:28,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:28,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:28,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:28,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:28,603 INFO L87 Difference]: Start difference. First operand 917 states and 3616 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:28,955 INFO L93 Difference]: Finished difference Result 1400 states and 5483 transitions. [2021-07-09 17:50:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:50:28,956 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:28,960 INFO L225 Difference]: With dead ends: 1400 [2021-07-09 17:50:28,960 INFO L226 Difference]: Without dead ends: 1329 [2021-07-09 17:50:28,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:50:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-09 17:50:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 884. [2021-07-09 17:50:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:28,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-07-09 17:50:28,981 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-07-09 17:50:28,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:28,981 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-07-09 17:50:28,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-07-09 17:50:28,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:28,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:28,983 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:29,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-07-09 17:50:29,202 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:29,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:29,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1360705344, now seen corresponding path program 10 times [2021-07-09 17:50:29,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:29,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344227239] [2021-07-09 17:50:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:29,278 INFO 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 17:50:29,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:29,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344227239] [2021-07-09 17:50:29,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344227239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:29,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911893728] [2021-07-09 17:50:29,279 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 17:50:29,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:29,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:29,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:29,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:29,421 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 17:50:29,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:29,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:29,429 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 17:50:29,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:50:29,464 INFO 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 17:50:29,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911893728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:29,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:29,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:50:29,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294249364] [2021-07-09 17:50:29,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:29,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:29,465 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:29,902 INFO L93 Difference]: Finished difference Result 1770 states and 6860 transitions. [2021-07-09 17:50:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:50:29,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:29,906 INFO L225 Difference]: With dead ends: 1770 [2021-07-09 17:50:29,906 INFO L226 Difference]: Without dead ends: 1699 [2021-07-09 17:50:29,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:29,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-07-09 17:50:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 916. [2021-07-09 17:50:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.9366120218579237) internal successors, (3602), 915 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3602 transitions. [2021-07-09 17:50:29,922 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3602 transitions. Word has length 26 [2021-07-09 17:50:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:29,923 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3602 transitions. [2021-07-09 17:50:29,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:29,923 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3602 transitions. [2021-07-09 17:50:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:29,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:29,925 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:30,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:30,128 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:30,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:30,128 INFO L82 PathProgramCache]: Analyzing trace with hash -55965950, now seen corresponding path program 10 times [2021-07-09 17:50:30,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:30,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901771567] [2021-07-09 17:50:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:30,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:30,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901771567] [2021-07-09 17:50:30,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901771567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:30,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090435052] [2021-07-09 17:50:30,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:30,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:30,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:30,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:30,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:30,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:30,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:50:30,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:30,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:30,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:30,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:50:30,407 INFO 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 17:50:30,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090435052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:30,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:30,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:50:30,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423837065] [2021-07-09 17:50:30,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:30,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:30,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:30,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:30,408 INFO L87 Difference]: Start difference. First operand 916 states and 3602 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:30,829 INFO L93 Difference]: Finished difference Result 1728 states and 6709 transitions. [2021-07-09 17:50:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:50:30,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:30,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:30,833 INFO L225 Difference]: With dead ends: 1728 [2021-07-09 17:50:30,833 INFO L226 Difference]: Without dead ends: 1657 [2021-07-09 17:50:30,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-07-09 17:50:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 884. [2021-07-09 17:50:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-07-09 17:50:30,850 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-07-09 17:50:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:30,850 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-07-09 17:50:30,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:30,850 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-07-09 17:50:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:30,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:30,852 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:31,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:31,054 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:31,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:31,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1118772638, now seen corresponding path program 11 times [2021-07-09 17:50:31,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:31,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587264918] [2021-07-09 17:50:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:31,138 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 17:50:31,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:31,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587264918] [2021-07-09 17:50:31,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587264918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:31,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505210728] [2021-07-09 17:50:31,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:31,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:31,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:31,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:31,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:31,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:31,257 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 17:50:31,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:31,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:31,265 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 17:50:31,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-09 17:50:31,308 INFO 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 17:50:31,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505210728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:31,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:31,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:50:31,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472925087] [2021-07-09 17:50:31,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:31,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:31,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:31,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:31,309 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:31,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:31,501 INFO L93 Difference]: Finished difference Result 1395 states and 5445 transitions. [2021-07-09 17:50:31,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:31,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:31,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:31,504 INFO L225 Difference]: With dead ends: 1395 [2021-07-09 17:50:31,504 INFO L226 Difference]: Without dead ends: 1314 [2021-07-09 17:50:31,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:50:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-07-09 17:50:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 923. [2021-07-09 17:50:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.9425162689804774) internal successors, (3635), 922 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:31,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3635 transitions. [2021-07-09 17:50:31,525 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3635 transitions. Word has length 26 [2021-07-09 17:50:31,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:31,525 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 3635 transitions. [2021-07-09 17:50:31,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3635 transitions. [2021-07-09 17:50:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:31,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:31,527 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:31,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 17:50:31,741 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:31,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:31,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1871455264, now seen corresponding path program 11 times [2021-07-09 17:50:31,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:31,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594319404] [2021-07-09 17:50:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:31,842 INFO 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 17:50:31,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:31,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594319404] [2021-07-09 17:50:31,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594319404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:31,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3128424] [2021-07-09 17:50:31,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:31,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:31,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:31,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:31,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:31,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:31,976 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 17:50:31,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:31,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:31,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:31,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-09 17:50:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:32,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3128424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:32,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:32,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:50:32,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235053273] [2021-07-09 17:50:32,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:32,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:32,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:32,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:32,020 INFO L87 Difference]: Start difference. First operand 923 states and 3635 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:32,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:32,296 INFO L93 Difference]: Finished difference Result 1351 states and 5290 transitions. [2021-07-09 17:50:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:32,298 INFO L225 Difference]: With dead ends: 1351 [2021-07-09 17:50:32,298 INFO L226 Difference]: Without dead ends: 1270 [2021-07-09 17:50:32,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:50:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-07-09 17:50:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 893. [2021-07-09 17:50:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.958520179372197) internal successors, (3531), 892 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3531 transitions. [2021-07-09 17:50:32,312 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3531 transitions. Word has length 26 [2021-07-09 17:50:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:32,312 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3531 transitions. [2021-07-09 17:50:32,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3531 transitions. [2021-07-09 17:50:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:32,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:32,314 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:32,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 17:50:32,515 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:32,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:32,515 INFO L82 PathProgramCache]: Analyzing trace with hash 937883420, now seen corresponding path program 12 times [2021-07-09 17:50:32,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:32,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55928893] [2021-07-09 17:50:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:32,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:32,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55928893] [2021-07-09 17:50:32,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55928893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:32,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151220955] [2021-07-09 17:50:32,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:32,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:50:32,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:32,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:32,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:32,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:32,713 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 17:50:32,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:32,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:32,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:32,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:50:32,837 INFO 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 17:50:32,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151220955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:32,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:32,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:50:32,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908681958] [2021-07-09 17:50:32,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:50:32,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:32,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:50:32,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:32,838 INFO L87 Difference]: Start difference. First operand 893 states and 3531 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:33,659 INFO L93 Difference]: Finished difference Result 2174 states and 8231 transitions. [2021-07-09 17:50:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:50:33,660 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:33,664 INFO L225 Difference]: With dead ends: 2174 [2021-07-09 17:50:33,664 INFO L226 Difference]: Without dead ends: 1901 [2021-07-09 17:50:33,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 657.0ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:50:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2021-07-09 17:50:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 899. [2021-07-09 17:50:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.9621380846325165) internal successors, (3558), 898 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3558 transitions. [2021-07-09 17:50:33,682 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3558 transitions. Word has length 26 [2021-07-09 17:50:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:33,682 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 3558 transitions. [2021-07-09 17:50:33,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3558 transitions. [2021-07-09 17:50:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:33,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:33,684 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:33,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:33,885 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1804311932, now seen corresponding path program 13 times [2021-07-09 17:50:33,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:33,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994153604] [2021-07-09 17:50:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:33,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:33,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994153604] [2021-07-09 17:50:33,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994153604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:33,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356892827] [2021-07-09 17:50:33,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:34,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:34,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:34,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:34,084 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 17:50:34,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:34,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:34,094 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 17:50:34,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:34,149 INFO 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 17:50:34,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356892827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:34,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:34,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:34,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267538721] [2021-07-09 17:50:34,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:34,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:34,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:34,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:34,150 INFO L87 Difference]: Start difference. First operand 899 states and 3558 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:34,499 INFO L93 Difference]: Finished difference Result 1423 states and 5561 transitions. [2021-07-09 17:50:34,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:50:34,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:34,504 INFO L225 Difference]: With dead ends: 1423 [2021-07-09 17:50:34,504 INFO L226 Difference]: Without dead ends: 1333 [2021-07-09 17:50:34,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:50:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-07-09 17:50:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 899. [2021-07-09 17:50:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.961024498886414) internal successors, (3557), 898 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3557 transitions. [2021-07-09 17:50:34,524 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3557 transitions. Word has length 26 [2021-07-09 17:50:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:34,524 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 3557 transitions. [2021-07-09 17:50:34,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3557 transitions. [2021-07-09 17:50:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:34,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:34,527 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:34,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:34,733 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:34,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1228606434, now seen corresponding path program 12 times [2021-07-09 17:50:34,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:34,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460963713] [2021-07-09 17:50:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:34,806 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 17:50:34,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:34,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460963713] [2021-07-09 17:50:34,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460963713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:34,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930101764] [2021-07-09 17:50:34,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:34,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:50:34,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:34,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:34,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:34,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:34,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:50:34,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:34,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:34,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:34,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:50:35,086 INFO 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 17:50:35,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930101764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:35,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:35,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:50:35,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751439939] [2021-07-09 17:50:35,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:50:35,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:50:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:35,087 INFO L87 Difference]: Start difference. First operand 899 states and 3557 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:37,253 INFO L93 Difference]: Finished difference Result 2044 states and 7778 transitions. [2021-07-09 17:50:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 17:50:37,254 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:37,258 INFO L225 Difference]: With dead ends: 2044 [2021-07-09 17:50:37,258 INFO L226 Difference]: Without dead ends: 1885 [2021-07-09 17:50:37,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1583.1ms TimeCoverageRelationStatistics Valid=641, Invalid=2551, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:50:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-07-09 17:50:37,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 928. [2021-07-09 17:50:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.9525350593311757) internal successors, (3664), 927 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3664 transitions. [2021-07-09 17:50:37,282 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3664 transitions. Word has length 26 [2021-07-09 17:50:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:37,283 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3664 transitions. [2021-07-09 17:50:37,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3664 transitions. [2021-07-09 17:50:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:37,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:37,285 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:37,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:37,501 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:37,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1670773786, now seen corresponding path program 13 times [2021-07-09 17:50:37,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:37,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258247689] [2021-07-09 17:50:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:37,583 INFO 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 17:50:37,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:37,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258247689] [2021-07-09 17:50:37,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258247689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:37,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518588700] [2021-07-09 17:50:37,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:37,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:37,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:37,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:37,697 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 17:50:37,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:37,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:37,707 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 17:50:37,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:37,759 INFO 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 17:50:37,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518588700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:37,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:37,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:37,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303666248] [2021-07-09 17:50:37,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:37,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:37,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:37,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:37,760 INFO L87 Difference]: Start difference. First operand 928 states and 3664 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:37,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:37,975 INFO L93 Difference]: Finished difference Result 1337 states and 5240 transitions. [2021-07-09 17:50:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:37,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:37,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:37,977 INFO L225 Difference]: With dead ends: 1337 [2021-07-09 17:50:37,977 INFO L226 Difference]: Without dead ends: 1254 [2021-07-09 17:50:37,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:37,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-07-09 17:50:37,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 922. [2021-07-09 17:50:37,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-07-09 17:50:37,991 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-07-09 17:50:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:37,991 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-07-09 17:50:37,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-07-09 17:50:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:37,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:37,993 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:38,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-09 17:50:38,194 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:38,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:38,194 INFO L82 PathProgramCache]: Analyzing trace with hash 185293270, now seen corresponding path program 11 times [2021-07-09 17:50:38,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:38,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601341129] [2021-07-09 17:50:38,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:38,253 INFO 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 17:50:38,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:38,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601341129] [2021-07-09 17:50:38,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601341129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:38,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36271893] [2021-07-09 17:50:38,254 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 17:50:38,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:50:38,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:38,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:38,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:38,372 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 17:50:38,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:38,390 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-07-09 17:50:38,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:38,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:13 [2021-07-09 17:50:38,447 INFO 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 17:50:38,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36271893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:38,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:38,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:50:38,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575338501] [2021-07-09 17:50:38,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:38,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:38,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:38,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:38,450 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:38,742 INFO L93 Difference]: Finished difference Result 1343 states and 5277 transitions. [2021-07-09 17:50:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:38,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:38,745 INFO L225 Difference]: With dead ends: 1343 [2021-07-09 17:50:38,745 INFO L226 Difference]: Without dead ends: 1261 [2021-07-09 17:50:38,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:50:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-07-09 17:50:38,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 940. [2021-07-09 17:50:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-07-09 17:50:38,759 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-07-09 17:50:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:38,759 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-07-09 17:50:38,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-07-09 17:50:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:38,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:38,761 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:38,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:38,962 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:38,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:38,962 INFO L82 PathProgramCache]: Analyzing trace with hash -890966630, now seen corresponding path program 12 times [2021-07-09 17:50:38,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:38,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356091183] [2021-07-09 17:50:38,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:39,031 INFO 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 17:50:39,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:39,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356091183] [2021-07-09 17:50:39,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356091183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:39,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135673374] [2021-07-09 17:50:39,032 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 17:50:39,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:50:39,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:39,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:39,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:39,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:39,151 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 17:50:39,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:39,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:39,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:39,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-09 17:50:39,246 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 17:50:39,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135673374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:39,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:39,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:50:39,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952524196] [2021-07-09 17:50:39,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:50:39,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:39,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:50:39,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:50:39,248 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:39,721 INFO L93 Difference]: Finished difference Result 1447 states and 5652 transitions. [2021-07-09 17:50:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:50:39,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:39,725 INFO L225 Difference]: With dead ends: 1447 [2021-07-09 17:50:39,725 INFO L226 Difference]: Without dead ends: 1374 [2021-07-09 17:50:39,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:50:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-07-09 17:50:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 931. [2021-07-09 17:50:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:39,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-07-09 17:50:39,740 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-07-09 17:50:39,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:39,741 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-07-09 17:50:39,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:39,741 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-07-09 17:50:39,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:39,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:39,743 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:39,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 17:50:39,943 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:39,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1340286744, now seen corresponding path program 11 times [2021-07-09 17:50:39,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:39,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660049103] [2021-07-09 17:50:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:40,010 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 17:50:40,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:40,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660049103] [2021-07-09 17:50:40,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660049103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:40,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522163869] [2021-07-09 17:50:40,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:40,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:50:40,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:40,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:40,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:40,096 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 17:50:40,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:40,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:40,106 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 17:50:40,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:40,175 INFO 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 17:50:40,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522163869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:40,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:40,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:40,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795254011] [2021-07-09 17:50:40,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:40,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:40,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:40,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:40,176 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:40,423 INFO L93 Difference]: Finished difference Result 1296 states and 5089 transitions. [2021-07-09 17:50:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:40,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:40,426 INFO L225 Difference]: With dead ends: 1296 [2021-07-09 17:50:40,426 INFO L226 Difference]: Without dead ends: 1223 [2021-07-09 17:50:40,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-07-09 17:50:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 940. [2021-07-09 17:50:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-07-09 17:50:40,449 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-07-09 17:50:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:40,449 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-07-09 17:50:40,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-07-09 17:50:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:40,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:40,452 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:40,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 17:50:40,657 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:40,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1428609474, now seen corresponding path program 12 times [2021-07-09 17:50:40,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:40,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327347327] [2021-07-09 17:50:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:40,731 INFO 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 17:50:40,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:40,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327347327] [2021-07-09 17:50:40,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327347327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:40,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489611947] [2021-07-09 17:50:40,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:40,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:50:40,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:40,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:40,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:40,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:40,862 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-09 17:50:40,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:40,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:40,880 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 17:50:40,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-07-09 17:50:40,981 INFO 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 17:50:40,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489611947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:40,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:40,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:50:40,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67138354] [2021-07-09 17:50:40,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:50:40,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:40,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:50:40,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:50:40,983 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:42,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:42,104 INFO L93 Difference]: Finished difference Result 1720 states and 6760 transitions. [2021-07-09 17:50:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:50:42,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:42,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:42,107 INFO L225 Difference]: With dead ends: 1720 [2021-07-09 17:50:42,107 INFO L226 Difference]: Without dead ends: 1645 [2021-07-09 17:50:42,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 805.8ms TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:50:42,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-07-09 17:50:42,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 931. [2021-07-09 17:50:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-07-09 17:50:42,132 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-07-09 17:50:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:42,132 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-07-09 17:50:42,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-07-09 17:50:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:42,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:42,135 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] [2021-07-09 17:50:42,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 17:50:42,357 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:42,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:42,357 INFO L82 PathProgramCache]: Analyzing trace with hash 450176604, now seen corresponding path program 13 times [2021-07-09 17:50:42,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:42,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195179035] [2021-07-09 17:50:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:42,434 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 17:50:42,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:42,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195179035] [2021-07-09 17:50:42,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195179035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:42,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968631858] [2021-07-09 17:50:42,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:42,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:42,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:42,544 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 17:50:42,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:42,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:42,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:42,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-09 17:50:42,586 INFO 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 17:50:42,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968631858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:42,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:42,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:42,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806655636] [2021-07-09 17:50:42,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:42,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:42,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:42,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:42,587 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:42,838 INFO L93 Difference]: Finished difference Result 1323 states and 5177 transitions. [2021-07-09 17:50:42,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:42,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:42,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:42,841 INFO L225 Difference]: With dead ends: 1323 [2021-07-09 17:50:42,841 INFO L226 Difference]: Without dead ends: 1252 [2021-07-09 17:50:42,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-07-09 17:50:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 955. [2021-07-09 17:50:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.9454926624737947) internal successors, (3764), 954 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3764 transitions. [2021-07-09 17:50:42,865 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3764 transitions. Word has length 26 [2021-07-09 17:50:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:42,865 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3764 transitions. [2021-07-09 17:50:42,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3764 transitions. [2021-07-09 17:50:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:42,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:42,867 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:43,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-09 17:50:43,068 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:43,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1315832056, now seen corresponding path program 13 times [2021-07-09 17:50:43,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:43,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380312176] [2021-07-09 17:50:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:43,158 INFO 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 17:50:43,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:43,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380312176] [2021-07-09 17:50:43,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380312176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:43,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233306649] [2021-07-09 17:50:43,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:43,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:43,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:43,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:43,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:50:43,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:43,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:43,280 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 17:50:43,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-09 17:50:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:43,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233306649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:43,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:43,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:50:43,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410139978] [2021-07-09 17:50:43,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:43,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:43,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:43,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:43,314 INFO L87 Difference]: Start difference. First operand 955 states and 3764 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:43,576 INFO L93 Difference]: Finished difference Result 1359 states and 5303 transitions. [2021-07-09 17:50:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:43,576 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:43,579 INFO L225 Difference]: With dead ends: 1359 [2021-07-09 17:50:43,579 INFO L226 Difference]: Without dead ends: 1288 [2021-07-09 17:50:43,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:50:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-07-09 17:50:43,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 922. [2021-07-09 17:50:43,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-07-09 17:50:43,595 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-07-09 17:50:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:43,595 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-07-09 17:50:43,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-07-09 17:50:43,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:43,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:43,597 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:43,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:43,798 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:43,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:43,798 INFO L82 PathProgramCache]: Analyzing trace with hash -457858102, now seen corresponding path program 14 times [2021-07-09 17:50:43,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:43,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954049651] [2021-07-09 17:50:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:43,882 INFO 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 17:50:43,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:43,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954049651] [2021-07-09 17:50:43,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954049651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:43,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743554410] [2021-07-09 17:50:43,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:50:43,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:43,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:43,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:43,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:43,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:43,992 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 17:50:43,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:44,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:44,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:44,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:50:44,042 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 17:50:44,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743554410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:44,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:44,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:44,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779097591] [2021-07-09 17:50:44,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:44,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:44,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:44,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:44,043 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:44,448 INFO L93 Difference]: Finished difference Result 1628 states and 6288 transitions. [2021-07-09 17:50:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:50:44,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:44,451 INFO L225 Difference]: With dead ends: 1628 [2021-07-09 17:50:44,452 INFO L226 Difference]: Without dead ends: 1537 [2021-07-09 17:50:44,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:50:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-07-09 17:50:44,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 964. [2021-07-09 17:50:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.936656282450675) internal successors, (3791), 963 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3791 transitions. [2021-07-09 17:50:44,468 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3791 transitions. Word has length 26 [2021-07-09 17:50:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:44,468 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 3791 transitions. [2021-07-09 17:50:44,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3791 transitions. [2021-07-09 17:50:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:44,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:44,470 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:44,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 17:50:44,671 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:44,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:44,671 INFO L82 PathProgramCache]: Analyzing trace with hash 915987316, now seen corresponding path program 14 times [2021-07-09 17:50:44,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:44,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131474840] [2021-07-09 17:50:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:44,757 INFO 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 17:50:44,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:44,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131474840] [2021-07-09 17:50:44,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131474840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:44,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581364092] [2021-07-09 17:50:44,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:44,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:44,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:44,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:44,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:44,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:44,933 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 17:50:44,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:44,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:44,946 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 17:50:44,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-07-09 17:50:45,035 INFO 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 17:50:45,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581364092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:45,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:45,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:50:45,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255131842] [2021-07-09 17:50:45,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:50:45,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:45,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:50:45,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:50:45,036 INFO L87 Difference]: Start difference. First operand 964 states and 3791 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:45,906 INFO L93 Difference]: Finished difference Result 1752 states and 6896 transitions. [2021-07-09 17:50:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:50:45,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:45,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:45,910 INFO L225 Difference]: With dead ends: 1752 [2021-07-09 17:50:45,910 INFO L226 Difference]: Without dead ends: 1670 [2021-07-09 17:50:45,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 615.9ms TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:50:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-07-09 17:50:45,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 931. [2021-07-09 17:50:45,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-07-09 17:50:45,925 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-07-09 17:50:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:45,925 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-07-09 17:50:45,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:45,926 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-07-09 17:50:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:45,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:45,927 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:46,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:46,128 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:46,128 INFO L82 PathProgramCache]: Analyzing trace with hash -542256876, now seen corresponding path program 15 times [2021-07-09 17:50:46,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:46,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087326310] [2021-07-09 17:50:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:46,211 INFO 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 17:50:46,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:46,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087326310] [2021-07-09 17:50:46,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087326310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:46,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584122350] [2021-07-09 17:50:46,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:46,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:50:46,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:46,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:46,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:46,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:46,305 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 17:50:46,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:46,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:46,323 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 17:50:46,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-07-09 17:50:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:46,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584122350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:46,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:46,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:50:46,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791051120] [2021-07-09 17:50:46,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:46,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:46,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:46,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:46,461 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:47,158 INFO L93 Difference]: Finished difference Result 1720 states and 6672 transitions. [2021-07-09 17:50:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:50:47,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:47,162 INFO L225 Difference]: With dead ends: 1720 [2021-07-09 17:50:47,162 INFO L226 Difference]: Without dead ends: 1556 [2021-07-09 17:50:47,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 553.9ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:50:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-07-09 17:50:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 931. [2021-07-09 17:50:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-07-09 17:50:47,177 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-07-09 17:50:47,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:47,178 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-07-09 17:50:47,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-07-09 17:50:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:47,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:47,179 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:47,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-07-09 17:50:47,382 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:47,382 INFO L82 PathProgramCache]: Analyzing trace with hash 349033132, now seen corresponding path program 16 times [2021-07-09 17:50:47,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:47,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529951233] [2021-07-09 17:50:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:47,470 INFO 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 17:50:47,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:47,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529951233] [2021-07-09 17:50:47,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529951233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:47,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367124990] [2021-07-09 17:50:47,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:47,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:47,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:47,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:47,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:47,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:47,558 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 17:50:47,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:47,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:47,566 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 17:50:47,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:47,616 INFO 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 17:50:47,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367124990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:47,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:47,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:47,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192966747] [2021-07-09 17:50:47,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:47,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:47,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:47,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:47,617 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:47,972 INFO L93 Difference]: Finished difference Result 1440 states and 5633 transitions. [2021-07-09 17:50:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:50:47,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:47,975 INFO L225 Difference]: With dead ends: 1440 [2021-07-09 17:50:47,975 INFO L226 Difference]: Without dead ends: 1350 [2021-07-09 17:50:47,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:50:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-07-09 17:50:47,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 931. [2021-07-09 17:50:47,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-07-09 17:50:47,989 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-07-09 17:50:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:47,990 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-07-09 17:50:47,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:47,990 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-07-09 17:50:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:47,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:47,991 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:48,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 17:50:48,192 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:48,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1924590312, now seen corresponding path program 15 times [2021-07-09 17:50:48,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:48,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020520840] [2021-07-09 17:50:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:48,268 INFO 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 17:50:48,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:48,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020520840] [2021-07-09 17:50:48,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020520840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:48,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777868298] [2021-07-09 17:50:48,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:50:48,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:50:48,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:48,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:48,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:48,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:48,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:50:48,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:48,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:48,408 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 17:50:48,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-07-09 17:50:48,517 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 17:50:48,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777868298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:48,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:48,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:50:48,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331781653] [2021-07-09 17:50:48,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:50:48,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:48,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:50:48,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:50:48,518 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:49,808 INFO L93 Difference]: Finished difference Result 1839 states and 7230 transitions. [2021-07-09 17:50:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:50:49,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:49,812 INFO L225 Difference]: With dead ends: 1839 [2021-07-09 17:50:49,812 INFO L226 Difference]: Without dead ends: 1757 [2021-07-09 17:50:49,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 905.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:50:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-07-09 17:50:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 940. [2021-07-09 17:50:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.957401490947817) internal successors, (3716), 939 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3716 transitions. [2021-07-09 17:50:49,829 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3716 transitions. Word has length 26 [2021-07-09 17:50:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:49,829 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3716 transitions. [2021-07-09 17:50:49,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3716 transitions. [2021-07-09 17:50:49,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:49,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:49,831 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] [2021-07-09 17:50:50,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-09 17:50:50,031 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:50,032 INFO L82 PathProgramCache]: Analyzing trace with hash 632635148, now seen corresponding path program 16 times [2021-07-09 17:50:50,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:50,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319503293] [2021-07-09 17:50:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:50,103 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 17:50:50,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:50,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319503293] [2021-07-09 17:50:50,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319503293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:50,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694501378] [2021-07-09 17:50:50,103 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 17:50:50,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:50,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:50,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:50,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:50,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:50,210 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 17:50:50,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:50,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:50,220 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 17:50:50,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:50,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694501378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:50,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:50,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:50,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009851503] [2021-07-09 17:50:50,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:50,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:50,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:50,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:50,289 INFO L87 Difference]: Start difference. First operand 940 states and 3716 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:50,520 INFO L93 Difference]: Finished difference Result 1338 states and 5238 transitions. [2021-07-09 17:50:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:50,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:50,523 INFO L225 Difference]: With dead ends: 1338 [2021-07-09 17:50:50,523 INFO L226 Difference]: Without dead ends: 1265 [2021-07-09 17:50:50,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-07-09 17:50:50,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 922. [2021-07-09 17:50:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:50,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-07-09 17:50:50,537 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-07-09 17:50:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:50,537 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-07-09 17:50:50,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-07-09 17:50:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:50,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:50,539 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:50,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:50,740 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:50,740 INFO L82 PathProgramCache]: Analyzing trace with hash -903815988, now seen corresponding path program 14 times [2021-07-09 17:50:50,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:50,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590733923] [2021-07-09 17:50:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:50,803 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 17:50:50,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:50,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590733923] [2021-07-09 17:50:50,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590733923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:50,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607622409] [2021-07-09 17:50:50,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:50,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:50,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:50,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:50,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:50,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:50,957 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 17:50:50,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:50,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:50,973 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 17:50:50,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-07-09 17:50:51,046 INFO 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 17:50:51,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607622409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:51,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:51,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:50:51,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035492587] [2021-07-09 17:50:51,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:50:51,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:51,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:50:51,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:51,047 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:51,948 INFO L93 Difference]: Finished difference Result 1733 states and 6757 transitions. [2021-07-09 17:50:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:50:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:51,952 INFO L225 Difference]: With dead ends: 1733 [2021-07-09 17:50:51,952 INFO L226 Difference]: Without dead ends: 1660 [2021-07-09 17:50:51,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 563.5ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:50:51,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-07-09 17:50:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 958. [2021-07-09 17:50:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.941483803552769) internal successors, (3772), 957 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3772 transitions. [2021-07-09 17:50:51,968 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3772 transitions. Word has length 26 [2021-07-09 17:50:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:51,968 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3772 transitions. [2021-07-09 17:50:51,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3772 transitions. [2021-07-09 17:50:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:51,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:51,970 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:52,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 17:50:52,173 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:52,173 INFO L82 PathProgramCache]: Analyzing trace with hash -718822330, now seen corresponding path program 14 times [2021-07-09 17:50:52,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:52,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990092515] [2021-07-09 17:50:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:52,248 INFO 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 17:50:52,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:52,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990092515] [2021-07-09 17:50:52,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990092515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:52,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841319026] [2021-07-09 17:50:52,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:52,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:52,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:52,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:52,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:52,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:52,389 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 17:50:52,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:52,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:52,401 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 17:50:52,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-07-09 17:50:52,474 INFO 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 17:50:52,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841319026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:52,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:52,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:50:52,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498181158] [2021-07-09 17:50:52,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:50:52,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:52,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:50:52,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:50:52,475 INFO L87 Difference]: Start difference. First operand 958 states and 3772 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:53,439 INFO L93 Difference]: Finished difference Result 1770 states and 6931 transitions. [2021-07-09 17:50:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:50:53,440 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:53,443 INFO L225 Difference]: With dead ends: 1770 [2021-07-09 17:50:53,443 INFO L226 Difference]: Without dead ends: 1697 [2021-07-09 17:50:53,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 629.0ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:50:53,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-07-09 17:50:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 931. [2021-07-09 17:50:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-07-09 17:50:53,460 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-07-09 17:50:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:53,460 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-07-09 17:50:53,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:53,460 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-07-09 17:50:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:53,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:53,462 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] [2021-07-09 17:50:53,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:53,663 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:53,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:53,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1878957560, now seen corresponding path program 15 times [2021-07-09 17:50:53,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:53,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479848328] [2021-07-09 17:50:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:53,732 INFO 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 17:50:53,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:53,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479848328] [2021-07-09 17:50:53,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479848328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:53,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453337379] [2021-07-09 17:50:53,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:53,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:50:53,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:53,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:53,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:53,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:53,865 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 17:50:53,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:53,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:53,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:53,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:50:53,992 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 17:50:53,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453337379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:53,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:53,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:50:53,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839392918] [2021-07-09 17:50:53,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:50:53,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:53,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:50:53,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:53,994 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:55,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:55,273 INFO L93 Difference]: Finished difference Result 1771 states and 6888 transitions. [2021-07-09 17:50:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:50:55,273 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:55,276 INFO L225 Difference]: With dead ends: 1771 [2021-07-09 17:50:55,276 INFO L226 Difference]: Without dead ends: 1698 [2021-07-09 17:50:55,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 893.3ms TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:50:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-07-09 17:50:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 940. [2021-07-09 17:50:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-07-09 17:50:55,293 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-07-09 17:50:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:55,293 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-07-09 17:50:55,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-07-09 17:50:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:55,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:55,295 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:55,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 17:50:55,495 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:55,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2102483340, now seen corresponding path program 16 times [2021-07-09 17:50:55,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:55,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99440108] [2021-07-09 17:50:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:55,556 INFO 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 17:50:55,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:55,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99440108] [2021-07-09 17:50:55,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99440108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:55,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479250727] [2021-07-09 17:50:55,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:55,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:55,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:55,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:55,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:55,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:55,653 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 17:50:55,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:55,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:55,661 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 17:50:55,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:55,725 INFO 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 17:50:55,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479250727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:55,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:55,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:55,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180276890] [2021-07-09 17:50:55,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:55,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:55,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:55,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:55,726 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:55,959 INFO L93 Difference]: Finished difference Result 1357 states and 5335 transitions. [2021-07-09 17:50:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:55,962 INFO L225 Difference]: With dead ends: 1357 [2021-07-09 17:50:55,962 INFO L226 Difference]: Without dead ends: 1274 [2021-07-09 17:50:55,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-07-09 17:50:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 931. [2021-07-09 17:50:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-07-09 17:50:55,976 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-07-09 17:50:55,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:55,976 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-07-09 17:50:55,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:55,976 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-07-09 17:50:55,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:55,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:55,977 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:56,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 17:50:56,181 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:56,181 INFO L82 PathProgramCache]: Analyzing trace with hash -12293946, now seen corresponding path program 15 times [2021-07-09 17:50:56,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:56,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19275771] [2021-07-09 17:50:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:56,244 INFO 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 17:50:56,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:56,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19275771] [2021-07-09 17:50:56,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19275771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:56,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402492791] [2021-07-09 17:50:56,244 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 17:50:56,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:50:56,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:56,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:56,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:56,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:50:56,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:50:56,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:56,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:50:56,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:50:56,453 INFO 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 17:50:56,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402492791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:56,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:56,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:50:56,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199024123] [2021-07-09 17:50:56,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:50:56,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:56,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:50:56,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:56,454 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:57,248 INFO L93 Difference]: Finished difference Result 1666 states and 6528 transitions. [2021-07-09 17:50:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:50:57,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:57,251 INFO L225 Difference]: With dead ends: 1666 [2021-07-09 17:50:57,251 INFO L226 Difference]: Without dead ends: 1593 [2021-07-09 17:50:57,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 576.2ms TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:50:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-07-09 17:50:57,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 940. [2021-07-09 17:50:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:57,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-07-09 17:50:57,268 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-07-09 17:50:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:57,269 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-07-09 17:50:57,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-07-09 17:50:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:57,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:57,270 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:57,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 17:50:57,471 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:57,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:57,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2125331096, now seen corresponding path program 16 times [2021-07-09 17:50:57,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:57,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654646303] [2021-07-09 17:50:57,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:57,535 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 17:50:57,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:57,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654646303] [2021-07-09 17:50:57,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654646303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:57,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857507187] [2021-07-09 17:50:57,536 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 17:50:57,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:57,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:57,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:57,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:57,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:57,630 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 17:50:57,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:57,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:57,639 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 17:50:57,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:50:57,688 INFO 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 17:50:57,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857507187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:57,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:57,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:57,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046233694] [2021-07-09 17:50:57,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:57,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:57,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:57,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:57,689 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:57,900 INFO L93 Difference]: Finished difference Result 1299 states and 5104 transitions. [2021-07-09 17:50:57,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:50:57,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:57,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:57,902 INFO L225 Difference]: With dead ends: 1299 [2021-07-09 17:50:57,902 INFO L226 Difference]: Without dead ends: 1224 [2021-07-09 17:50:57,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:50:57,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-07-09 17:50:57,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 922. [2021-07-09 17:50:57,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-07-09 17:50:57,916 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-07-09 17:50:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:57,916 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-07-09 17:50:57,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-07-09 17:50:57,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:57,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:57,917 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:58,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:58,120 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:58,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:58,120 INFO L82 PathProgramCache]: Analyzing trace with hash 514209786, now seen corresponding path program 17 times [2021-07-09 17:50:58,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:58,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034186150] [2021-07-09 17:50:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:58,221 INFO 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 17:50:58,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:58,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034186150] [2021-07-09 17:50:58,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034186150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:58,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731728227] [2021-07-09 17:50:58,222 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 17:50:58,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:50:58,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:58,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:58,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:58,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:58,330 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 17:50:58,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:58,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:58,338 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 17:50:58,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:50:58,379 INFO 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 17:50:58,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731728227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:58,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:58,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:50:58,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277651635] [2021-07-09 17:50:58,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:58,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:58,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:58,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:58,380 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:58,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:58,951 INFO L93 Difference]: Finished difference Result 2168 states and 8464 transitions. [2021-07-09 17:50:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:50:58,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:58,955 INFO L225 Difference]: With dead ends: 2168 [2021-07-09 17:50:58,955 INFO L226 Difference]: Without dead ends: 2086 [2021-07-09 17:50:58,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:50:58,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-07-09 17:50:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 984. [2021-07-09 17:50:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.9114954221770093) internal successors, (3845), 983 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3845 transitions. [2021-07-09 17:50:58,973 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3845 transitions. Word has length 26 [2021-07-09 17:50:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:58,973 INFO L482 AbstractCegarLoop]: Abstraction has 984 states and 3845 transitions. [2021-07-09 17:50:58,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:58,973 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3845 transitions. [2021-07-09 17:50:58,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:58,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:58,975 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:59,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 17:50:59,175 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:59,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:59,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1888055204, now seen corresponding path program 17 times [2021-07-09 17:50:59,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:59,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610343008] [2021-07-09 17:50:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:59,251 INFO 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 17:50:59,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:59,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610343008] [2021-07-09 17:50:59,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610343008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:59,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922103091] [2021-07-09 17:50:59,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:59,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:59,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:59,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:50:59,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:59,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:59,359 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 17:50:59,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:59,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:59,367 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 17:50:59,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:50:59,407 INFO 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 17:50:59,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922103091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:59,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:59,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:50:59,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818032229] [2021-07-09 17:50:59,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:59,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:59,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:59,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:59,408 INFO L87 Difference]: Start difference. First operand 984 states and 3845 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:59,898 INFO L93 Difference]: Finished difference Result 2118 states and 8296 transitions. [2021-07-09 17:50:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:50:59,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:50:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:59,902 INFO L225 Difference]: With dead ends: 2118 [2021-07-09 17:50:59,902 INFO L226 Difference]: Without dead ends: 2036 [2021-07-09 17:50:59,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-07-09 17:50:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 954. [2021-07-09 17:50:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.931794333683106) internal successors, (3747), 953 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3747 transitions. [2021-07-09 17:50:59,921 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3747 transitions. Word has length 26 [2021-07-09 17:50:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:59,921 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3747 transitions. [2021-07-09 17:50:59,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3747 transitions. [2021-07-09 17:50:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:50:59,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:59,923 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:00,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 17:51:00,123 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:00,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:00,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1300056958, now seen corresponding path program 18 times [2021-07-09 17:51:00,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:00,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574815280] [2021-07-09 17:51:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:00,220 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 17:51:00,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:00,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574815280] [2021-07-09 17:51:00,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574815280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:00,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330123207] [2021-07-09 17:51:00,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:00,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:51:00,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:00,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:51:00,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:00,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:00,331 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 17:51:00,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:51:00,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:00,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:00,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-07-09 17:51:00,409 INFO 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 17:51:00,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330123207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:00,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:00,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:51:00,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356754811] [2021-07-09 17:51:00,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:51:00,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:00,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:51:00,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:51:00,411 INFO L87 Difference]: Start difference. First operand 954 states and 3747 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:01,173 INFO L93 Difference]: Finished difference Result 2208 states and 8474 transitions. [2021-07-09 17:51:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:51:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:01,178 INFO L225 Difference]: With dead ends: 2208 [2021-07-09 17:51:01,178 INFO L226 Difference]: Without dead ends: 2044 [2021-07-09 17:51:01,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 446.4ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:51:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-07-09 17:51:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 996. [2021-07-09 17:51:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.9115577889447235) internal successors, (3892), 995 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:01,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3892 transitions. [2021-07-09 17:51:01,197 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3892 transitions. Word has length 26 [2021-07-09 17:51:01,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:01,197 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3892 transitions. [2021-07-09 17:51:01,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3892 transitions. [2021-07-09 17:51:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:01,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:01,198 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:01,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:01,401 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:01,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:01,406 INFO L82 PathProgramCache]: Analyzing trace with hash 73788460, now seen corresponding path program 18 times [2021-07-09 17:51:01,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:01,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091490158] [2021-07-09 17:51:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:01,499 INFO 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 17:51:01,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:01,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091490158] [2021-07-09 17:51:01,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091490158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:01,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15057783] [2021-07-09 17:51:01,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:01,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:51:01,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:01,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:51:01,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:01,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:01,652 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 11 treesize of output 15 [2021-07-09 17:51:01,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:51:01,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:01,664 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 17:51:01,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-07-09 17:51:01,747 INFO 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 17:51:01,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15057783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:01,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:01,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:51:01,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479497471] [2021-07-09 17:51:01,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:51:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:01,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:51:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:51:01,748 INFO L87 Difference]: Start difference. First operand 996 states and 3892 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:02,767 INFO L93 Difference]: Finished difference Result 1751 states and 6865 transitions. [2021-07-09 17:51:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:51:02,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:02,771 INFO L225 Difference]: With dead ends: 1751 [2021-07-09 17:51:02,771 INFO L226 Difference]: Without dead ends: 1669 [2021-07-09 17:51:02,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 668.7ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:51:02,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-07-09 17:51:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 963. [2021-07-09 17:51:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9293139293139294) internal successors, (3780), 962 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:02,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3780 transitions. [2021-07-09 17:51:02,787 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3780 transitions. Word has length 26 [2021-07-09 17:51:02,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:02,787 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3780 transitions. [2021-07-09 17:51:02,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3780 transitions. [2021-07-09 17:51:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:02,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:02,789 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:02,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:02,989 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:02,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1153064272, now seen corresponding path program 19 times [2021-07-09 17:51:02,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:02,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452965668] [2021-07-09 17:51:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:03,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:03,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452965668] [2021-07-09 17:51:03,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452965668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:03,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454754241] [2021-07-09 17:51:03,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:03,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:51:03,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:03,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:03,215 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 17:51:03,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:03,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:03,225 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 17:51:03,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:51:03,279 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 17:51:03,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454754241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:03,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:03,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:51:03,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841657423] [2021-07-09 17:51:03,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:51:03,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:03,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:51:03,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:51:03,280 INFO L87 Difference]: Start difference. First operand 963 states and 3780 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:03,783 INFO L93 Difference]: Finished difference Result 1759 states and 6856 transitions. [2021-07-09 17:51:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:51:03,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:03,787 INFO L225 Difference]: With dead ends: 1759 [2021-07-09 17:51:03,787 INFO L226 Difference]: Without dead ends: 1668 [2021-07-09 17:51:03,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-07-09 17:51:03,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 963. [2021-07-09 17:51:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9293139293139294) internal successors, (3780), 962 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3780 transitions. [2021-07-09 17:51:03,804 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3780 transitions. Word has length 26 [2021-07-09 17:51:03,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:03,805 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3780 transitions. [2021-07-09 17:51:03,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3780 transitions. [2021-07-09 17:51:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:03,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:03,807 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:04,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 17:51:04,021 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:04,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:04,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2044354280, now seen corresponding path program 20 times [2021-07-09 17:51:04,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:04,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790713748] [2021-07-09 17:51:04,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:04,140 INFO 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 17:51:04,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:04,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790713748] [2021-07-09 17:51:04,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790713748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:04,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313024064] [2021-07-09 17:51:04,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:04,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:04,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:04,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:51:04,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:04,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:04,240 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 17:51:04,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:04,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:04,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:04,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:51:04,306 INFO 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 17:51:04,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313024064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:04,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:04,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:51:04,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999492189] [2021-07-09 17:51:04,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:51:04,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:04,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:51:04,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:51:04,308 INFO L87 Difference]: Start difference. First operand 963 states and 3780 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:04,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:04,900 INFO L93 Difference]: Finished difference Result 1718 states and 6708 transitions. [2021-07-09 17:51:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:51:04,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:04,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:04,903 INFO L225 Difference]: With dead ends: 1718 [2021-07-09 17:51:04,904 INFO L226 Difference]: Without dead ends: 1628 [2021-07-09 17:51:04,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:51:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-07-09 17:51:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 963. [2021-07-09 17:51:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9293139293139294) internal successors, (3780), 962 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3780 transitions. [2021-07-09 17:51:04,920 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3780 transitions. Word has length 26 [2021-07-09 17:51:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:04,920 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3780 transitions. [2021-07-09 17:51:04,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:04,920 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3780 transitions. [2021-07-09 17:51:04,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:04,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:04,922 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:05,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:05,122 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:05,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:05,123 INFO L82 PathProgramCache]: Analyzing trace with hash -229269164, now seen corresponding path program 19 times [2021-07-09 17:51:05,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:05,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716644355] [2021-07-09 17:51:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:05,186 INFO 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 17:51:05,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:05,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716644355] [2021-07-09 17:51:05,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716644355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:05,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638293516] [2021-07-09 17:51:05,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:05,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:51:05,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:05,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:05,288 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 17:51:05,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:05,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:05,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:05,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:51:05,349 INFO 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 17:51:05,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638293516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:05,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:05,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:51:05,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509041778] [2021-07-09 17:51:05,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:51:05,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:05,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:51:05,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:51:05,349 INFO L87 Difference]: Start difference. First operand 963 states and 3780 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:05,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:05,700 INFO L93 Difference]: Finished difference Result 1509 states and 5906 transitions. [2021-07-09 17:51:05,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:51:05,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:05,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:05,703 INFO L225 Difference]: With dead ends: 1509 [2021-07-09 17:51:05,703 INFO L226 Difference]: Without dead ends: 1427 [2021-07-09 17:51:05,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:51:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-07-09 17:51:05,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 972. [2021-07-09 17:51:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.9309989701338828) internal successors, (3817), 971 states have internal predecessors, (3817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3817 transitions. [2021-07-09 17:51:05,721 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3817 transitions. Word has length 26 [2021-07-09 17:51:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:05,721 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 3817 transitions. [2021-07-09 17:51:05,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3817 transitions. [2021-07-09 17:51:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:05,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:05,722 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:05,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 17:51:05,923 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:05,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1967011000, now seen corresponding path program 20 times [2021-07-09 17:51:05,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:05,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199706170] [2021-07-09 17:51:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:05,989 INFO 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 17:51:05,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:05,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199706170] [2021-07-09 17:51:05,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199706170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:05,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044027842] [2021-07-09 17:51:05,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:06,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:06,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:06,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:51:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:06,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:06,092 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 17:51:06,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:06,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:06,100 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 17:51:06,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:51:06,177 INFO 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 17:51:06,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044027842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:06,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:06,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:51:06,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215854429] [2021-07-09 17:51:06,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:51:06,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:06,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:51:06,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:51:06,183 INFO L87 Difference]: Start difference. First operand 972 states and 3817 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:06,524 INFO L93 Difference]: Finished difference Result 1493 states and 5826 transitions. [2021-07-09 17:51:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:51:06,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:06,527 INFO L225 Difference]: With dead ends: 1493 [2021-07-09 17:51:06,527 INFO L226 Difference]: Without dead ends: 1420 [2021-07-09 17:51:06,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-07-09 17:51:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 954. [2021-07-09 17:51:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.931794333683106) internal successors, (3747), 953 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3747 transitions. [2021-07-09 17:51:06,542 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3747 transitions. Word has length 26 [2021-07-09 17:51:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:06,542 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3747 transitions. [2021-07-09 17:51:06,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3747 transitions. [2021-07-09 17:51:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:06,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:06,544 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:06,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:06,744 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:06,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1371947268, now seen corresponding path program 17 times [2021-07-09 17:51:06,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:06,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654028490] [2021-07-09 17:51:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:06,799 INFO 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 17:51:06,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:06,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654028490] [2021-07-09 17:51:06,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654028490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:06,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301809475] [2021-07-09 17:51:06,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:06,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:06,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:06,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:51:06,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:06,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:06,913 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 17:51:06,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:06,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:06,921 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 17:51:06,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:51:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:06,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301809475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:06,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:06,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:51:06,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745204700] [2021-07-09 17:51:06,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:51:06,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:06,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:51:06,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:51:06,959 INFO L87 Difference]: Start difference. First operand 954 states and 3747 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:07,402 INFO L93 Difference]: Finished difference Result 1935 states and 7456 transitions. [2021-07-09 17:51:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:51:07,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:07,406 INFO L225 Difference]: With dead ends: 1935 [2021-07-09 17:51:07,406 INFO L226 Difference]: Without dead ends: 1862 [2021-07-09 17:51:07,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-07-09 17:51:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1004. [2021-07-09 17:51:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 3.8913260219341974) internal successors, (3903), 1003 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:07,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3903 transitions. [2021-07-09 17:51:07,423 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3903 transitions. Word has length 26 [2021-07-09 17:51:07,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:07,423 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 3903 transitions. [2021-07-09 17:51:07,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3903 transitions. [2021-07-09 17:51:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:07,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:07,425 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:07,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:07,626 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1186953610, now seen corresponding path program 17 times [2021-07-09 17:51:07,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:07,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296071062] [2021-07-09 17:51:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:07,709 INFO 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 17:51:07,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:07,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296071062] [2021-07-09 17:51:07,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296071062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:07,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468468618] [2021-07-09 17:51:07,710 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 17:51:07,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:07,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:07,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:51:07,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:07,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:07,834 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 17:51:07,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:07,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:07,842 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 17:51:07,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-09 17:51:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:07,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468468618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:07,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:07,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:51:07,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150202388] [2021-07-09 17:51:07,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:51:07,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:07,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:51:07,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:51:07,890 INFO L87 Difference]: Start difference. First operand 1004 states and 3903 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:08,274 INFO L93 Difference]: Finished difference Result 1890 states and 7297 transitions. [2021-07-09 17:51:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:51:08,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:08,278 INFO L225 Difference]: With dead ends: 1890 [2021-07-09 17:51:08,278 INFO L226 Difference]: Without dead ends: 1817 [2021-07-09 17:51:08,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-07-09 17:51:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 960. [2021-07-09 17:51:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.9280500521376434) internal successors, (3767), 959 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3767 transitions. [2021-07-09 17:51:08,294 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3767 transitions. Word has length 26 [2021-07-09 17:51:08,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:08,294 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3767 transitions. [2021-07-09 17:51:08,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3767 transitions. [2021-07-09 17:51:08,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:08,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:08,296 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:08,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-09 17:51:08,496 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:08,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1349864576, now seen corresponding path program 18 times [2021-07-09 17:51:08,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:08,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427491164] [2021-07-09 17:51:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:08,554 INFO 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 17:51:08,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:08,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427491164] [2021-07-09 17:51:08,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427491164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:08,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806241637] [2021-07-09 17:51:08,554 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 17:51:08,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:51:08,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:08,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:51:08,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:08,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:08,688 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 17:51:08,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:51:08,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:08,701 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 17:51:08,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-07-09 17:51:08,768 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 17:51:08,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806241637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:08,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:08,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:51:08,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380561670] [2021-07-09 17:51:08,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:51:08,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:08,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:51:08,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:51:08,769 INFO L87 Difference]: Start difference. First operand 960 states and 3767 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:09,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:09,638 INFO L93 Difference]: Finished difference Result 1716 states and 6679 transitions. [2021-07-09 17:51:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:51:09,638 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:09,641 INFO L225 Difference]: With dead ends: 1716 [2021-07-09 17:51:09,642 INFO L226 Difference]: Without dead ends: 1643 [2021-07-09 17:51:09,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 582.2ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:51:09,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-07-09 17:51:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 996. [2021-07-09 17:51:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.912562814070352) internal successors, (3893), 995 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:09,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3893 transitions. [2021-07-09 17:51:09,657 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3893 transitions. Word has length 26 [2021-07-09 17:51:09,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:09,657 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3893 transitions. [2021-07-09 17:51:09,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3893 transitions. [2021-07-09 17:51:09,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:09,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:09,660 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:09,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:09,874 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:09,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:09,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1164870918, now seen corresponding path program 18 times [2021-07-09 17:51:09,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:09,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031836224] [2021-07-09 17:51:09,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:09,939 INFO 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 17:51:09,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:09,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031836224] [2021-07-09 17:51:09,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031836224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:09,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296237061] [2021-07-09 17:51:09,939 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 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 17:51:09,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:51:09,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:09,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:51:09,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:10,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:10,085 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 17:51:10,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:51:10,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:10,101 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 17:51:10,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-07-09 17:51:10,173 INFO 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 17:51:10,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296237061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:10,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:10,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:51:10,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206884000] [2021-07-09 17:51:10,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:51:10,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:10,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:51:10,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:51:10,174 INFO L87 Difference]: Start difference. First operand 996 states and 3893 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:11,119 INFO L93 Difference]: Finished difference Result 1753 states and 6853 transitions. [2021-07-09 17:51:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:51:11,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:11,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:11,122 INFO L225 Difference]: With dead ends: 1753 [2021-07-09 17:51:11,122 INFO L226 Difference]: Without dead ends: 1680 [2021-07-09 17:51:11,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 649.0ms TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:51:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-07-09 17:51:11,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 969. [2021-07-09 17:51:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.928719008264463) internal successors, (3803), 968 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3803 transitions. [2021-07-09 17:51:11,150 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3803 transitions. Word has length 26 [2021-07-09 17:51:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:11,150 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3803 transitions. [2021-07-09 17:51:11,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3803 transitions. [2021-07-09 17:51:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:11,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:11,152 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:11,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:11,352 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:11,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:11,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1969961148, now seen corresponding path program 19 times [2021-07-09 17:51:11,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:11,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847434693] [2021-07-09 17:51:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:11,405 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 17:51:11,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:11,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847434693] [2021-07-09 17:51:11,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847434693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:11,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306615585] [2021-07-09 17:51:11,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:11,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:51:11,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:11,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:11,513 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 17:51:11,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:11,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:11,522 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 17:51:11,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:51:11,574 INFO 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 17:51:11,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306615585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:11,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:11,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:51:11,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926927445] [2021-07-09 17:51:11,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:51:11,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:11,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:51:11,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:51:11,575 INFO L87 Difference]: Start difference. First operand 969 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:11,861 INFO L93 Difference]: Finished difference Result 1492 states and 5839 transitions. [2021-07-09 17:51:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:51:11,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:11,865 INFO L225 Difference]: With dead ends: 1492 [2021-07-09 17:51:11,865 INFO L226 Difference]: Without dead ends: 1419 [2021-07-09 17:51:11,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:51:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-07-09 17:51:11,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 978. [2021-07-09 17:51:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 3.930399181166837) internal successors, (3840), 977 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3840 transitions. [2021-07-09 17:51:11,880 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3840 transitions. Word has length 26 [2021-07-09 17:51:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:11,880 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 3840 transitions. [2021-07-09 17:51:11,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3840 transitions. [2021-07-09 17:51:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:11,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:11,883 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] [2021-07-09 17:51:12,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 17:51:12,096 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:12,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:12,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1656434752, now seen corresponding path program 20 times [2021-07-09 17:51:12,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:12,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173880011] [2021-07-09 17:51:12,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:12,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173880011] [2021-07-09 17:51:12,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173880011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669138444] [2021-07-09 17:51:12,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:12,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:12,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:12,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:51:12,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:12,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:12,264 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 17:51:12,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:51:12,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:12,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:12,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:51:12,379 INFO 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 17:51:12,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669138444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:12,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:12,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:51:12,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660763090] [2021-07-09 17:51:12,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:51:12,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:12,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:51:12,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:51:12,380 INFO L87 Difference]: Start difference. First operand 978 states and 3840 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:13,472 INFO L93 Difference]: Finished difference Result 1759 states and 6869 transitions. [2021-07-09 17:51:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:51:13,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:13,476 INFO L225 Difference]: With dead ends: 1759 [2021-07-09 17:51:13,476 INFO L226 Difference]: Without dead ends: 1676 [2021-07-09 17:51:13,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 748.5ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:51:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-07-09 17:51:13,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 969. [2021-07-09 17:51:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.928719008264463) internal successors, (3803), 968 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:13,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3803 transitions. [2021-07-09 17:51:13,491 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3803 transitions. Word has length 26 [2021-07-09 17:51:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:13,492 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3803 transitions. [2021-07-09 17:51:13,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3803 transitions. [2021-07-09 17:51:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:13,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:13,493 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:13,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 17:51:13,694 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:13,694 INFO L82 PathProgramCache]: Analyzing trace with hash -458342534, now seen corresponding path program 19 times [2021-07-09 17:51:13,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:13,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540095963] [2021-07-09 17:51:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:13,755 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 17:51:13,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:13,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540095963] [2021-07-09 17:51:13,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540095963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:13,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123011056] [2021-07-09 17:51:13,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:13,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:51:13,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:13,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:13,880 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 17:51:13,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:13,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:13,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:13,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-09 17:51:13,942 INFO 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 17:51:13,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123011056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:13,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:13,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:51:13,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903603826] [2021-07-09 17:51:13,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:51:13,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:13,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:51:13,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:51:13,943 INFO L87 Difference]: Start difference. First operand 969 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:14,390 INFO L93 Difference]: Finished difference Result 1439 states and 5646 transitions. [2021-07-09 17:51:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:51:14,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:14,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:14,394 INFO L225 Difference]: With dead ends: 1439 [2021-07-09 17:51:14,394 INFO L226 Difference]: Without dead ends: 1366 [2021-07-09 17:51:14,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:51:14,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-07-09 17:51:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 978. [2021-07-09 17:51:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 3.9314227226202663) internal successors, (3841), 977 states have internal predecessors, (3841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3841 transitions. [2021-07-09 17:51:14,416 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3841 transitions. Word has length 26 [2021-07-09 17:51:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:14,416 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 3841 transitions. [2021-07-09 17:51:14,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3841 transitions. [2021-07-09 17:51:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:14,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:14,418 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:14,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 17:51:14,641 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:14,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:14,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1723587612, now seen corresponding path program 20 times [2021-07-09 17:51:14,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:14,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916271209] [2021-07-09 17:51:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:14,698 INFO 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 17:51:14,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:14,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916271209] [2021-07-09 17:51:14,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916271209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:14,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977358757] [2021-07-09 17:51:14,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:14,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:14,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:14,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:51:14,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:14,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:14,794 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 17:51:14,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:51:14,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:14,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:14,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:51:14,926 INFO 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 17:51:14,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977358757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:14,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:14,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:51:14,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939653272] [2021-07-09 17:51:14,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:51:14,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:14,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:51:14,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:51:14,927 INFO L87 Difference]: Start difference. First operand 978 states and 3841 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:16,019 INFO L93 Difference]: Finished difference Result 1688 states and 6589 transitions. [2021-07-09 17:51:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:51:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:16,023 INFO L225 Difference]: With dead ends: 1688 [2021-07-09 17:51:16,023 INFO L226 Difference]: Without dead ends: 1613 [2021-07-09 17:51:16,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 729.5ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:51:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-07-09 17:51:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 960. [2021-07-09 17:51:16,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.9280500521376434) internal successors, (3767), 959 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3767 transitions. [2021-07-09 17:51:16,039 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3767 transitions. Word has length 26 [2021-07-09 17:51:16,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:16,039 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3767 transitions. [2021-07-09 17:51:16,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:16,039 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3767 transitions. [2021-07-09 17:51:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:16,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:16,041 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:16,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:16,242 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:16,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1893964963, now seen corresponding path program 21 times [2021-07-09 17:51:16,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:16,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031903386] [2021-07-09 17:51:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:16,264 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 17:51:16,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:16,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031903386] [2021-07-09 17:51:16,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031903386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:16,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202907822] [2021-07-09 17:51:16,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:16,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:51:16,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:16,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:16,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:16,363 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 17:51:16,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202907822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:16,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:16,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:51:16,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431429571] [2021-07-09 17:51:16,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:51:16,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:16,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:51:16,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:51:16,364 INFO L87 Difference]: Start difference. First operand 960 states and 3767 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:16,634 INFO L93 Difference]: Finished difference Result 3279 states and 12423 transitions. [2021-07-09 17:51:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:16,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:16,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:16,640 INFO L225 Difference]: With dead ends: 3279 [2021-07-09 17:51:16,640 INFO L226 Difference]: Without dead ends: 3102 [2021-07-09 17:51:16,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:16,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2021-07-09 17:51:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 1434. [2021-07-09 17:51:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 4.174459176552687) internal successors, (5982), 1433 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 5982 transitions. [2021-07-09 17:51:16,669 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 5982 transitions. Word has length 28 [2021-07-09 17:51:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:16,670 INFO L482 AbstractCegarLoop]: Abstraction has 1434 states and 5982 transitions. [2021-07-09 17:51:16,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 5982 transitions. [2021-07-09 17:51:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:16,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:16,672 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:16,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-09 17:51:16,873 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:16,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash 734851235, now seen corresponding path program 22 times [2021-07-09 17:51:16,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:16,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046365087] [2021-07-09 17:51:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:16,900 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 17:51:16,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:16,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046365087] [2021-07-09 17:51:16,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046365087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:16,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152686289] [2021-07-09 17:51:16,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:16,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:16,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:16,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:16,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:17,003 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 17:51:17,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152686289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:17,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:17,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:51:17,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469288202] [2021-07-09 17:51:17,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:51:17,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:17,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:51:17,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:51:17,004 INFO L87 Difference]: Start difference. First operand 1434 states and 5982 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:17,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:17,201 INFO L93 Difference]: Finished difference Result 3236 states and 12555 transitions. [2021-07-09 17:51:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:51:17,201 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:17,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:17,207 INFO L225 Difference]: With dead ends: 3236 [2021-07-09 17:51:17,207 INFO L226 Difference]: Without dead ends: 2982 [2021-07-09 17:51:17,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-07-09 17:51:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1795. [2021-07-09 17:51:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 4.193979933110368) internal successors, (7524), 1794 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 7524 transitions. [2021-07-09 17:51:17,243 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 7524 transitions. Word has length 28 [2021-07-09 17:51:17,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:17,243 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 7524 transitions. [2021-07-09 17:51:17,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 7524 transitions. [2021-07-09 17:51:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:17,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:17,246 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:17,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:17,447 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1098043517, now seen corresponding path program 23 times [2021-07-09 17:51:17,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:17,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057690358] [2021-07-09 17:51:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:17,465 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 17:51:17,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:17,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057690358] [2021-07-09 17:51:17,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057690358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:17,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316150990] [2021-07-09 17:51:17,466 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 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 17:51:17,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:51:17,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:17,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:17,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:17,561 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 17:51:17,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316150990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:17,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:17,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:51:17,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067467317] [2021-07-09 17:51:17,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:17,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:17,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:17,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:17,562 INFO L87 Difference]: Start difference. First operand 1795 states and 7524 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:17,764 INFO L93 Difference]: Finished difference Result 3187 states and 12461 transitions. [2021-07-09 17:51:17,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:51:17,765 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:17,771 INFO L225 Difference]: With dead ends: 3187 [2021-07-09 17:51:17,771 INFO L226 Difference]: Without dead ends: 3089 [2021-07-09 17:51:17,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-07-09 17:51:17,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 1790. [2021-07-09 17:51:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 4.18278367803242) internal successors, (7483), 1789 states have internal predecessors, (7483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 7483 transitions. [2021-07-09 17:51:17,811 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 7483 transitions. Word has length 28 [2021-07-09 17:51:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:17,811 INFO L482 AbstractCegarLoop]: Abstraction has 1790 states and 7483 transitions. [2021-07-09 17:51:17,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:17,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 7483 transitions. [2021-07-09 17:51:17,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:17,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:17,815 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:18,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:18,021 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:18,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1929816143, now seen corresponding path program 24 times [2021-07-09 17:51:18,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:18,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460207346] [2021-07-09 17:51:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:18,040 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 17:51:18,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:18,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460207346] [2021-07-09 17:51:18,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460207346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:18,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896292258] [2021-07-09 17:51:18,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:18,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:51:18,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:18,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:18,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:18,186 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 17:51:18,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896292258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:18,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:18,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:51:18,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883511580] [2021-07-09 17:51:18,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:18,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:18,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:18,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:18,187 INFO L87 Difference]: Start difference. First operand 1790 states and 7483 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:18,334 INFO L93 Difference]: Finished difference Result 3507 states and 13666 transitions. [2021-07-09 17:51:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:51:18,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:18,341 INFO L225 Difference]: With dead ends: 3507 [2021-07-09 17:51:18,341 INFO L226 Difference]: Without dead ends: 3255 [2021-07-09 17:51:18,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:51:18,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-07-09 17:51:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2159. [2021-07-09 17:51:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 4.244670991658944) internal successors, (9160), 2158 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 9160 transitions. [2021-07-09 17:51:18,384 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 9160 transitions. Word has length 28 [2021-07-09 17:51:18,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:18,384 INFO L482 AbstractCegarLoop]: Abstraction has 2159 states and 9160 transitions. [2021-07-09 17:51:18,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:18,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 9160 transitions. [2021-07-09 17:51:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:18,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:18,388 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:18,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:18,588 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:18,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1419687985, now seen corresponding path program 25 times [2021-07-09 17:51:18,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:18,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933717062] [2021-07-09 17:51:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:18,612 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 17:51:18,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933717062] [2021-07-09 17:51:18,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933717062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447624861] [2021-07-09 17:51:18,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:18,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:18,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:18,709 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 17:51:18,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447624861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:18,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:18,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:51:18,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538418332] [2021-07-09 17:51:18,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:18,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:18,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:18,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:18,710 INFO L87 Difference]: Start difference. First operand 2159 states and 9160 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:18,900 INFO L93 Difference]: Finished difference Result 3239 states and 13025 transitions. [2021-07-09 17:51:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:51:18,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:18,909 INFO L225 Difference]: With dead ends: 3239 [2021-07-09 17:51:18,909 INFO L226 Difference]: Without dead ends: 3150 [2021-07-09 17:51:18,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:51:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2021-07-09 17:51:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2206. [2021-07-09 17:51:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 4.284353741496599) internal successors, (9447), 2205 states have internal predecessors, (9447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 9447 transitions. [2021-07-09 17:51:18,961 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 9447 transitions. Word has length 28 [2021-07-09 17:51:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:18,961 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 9447 transitions. [2021-07-09 17:51:18,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 9447 transitions. [2021-07-09 17:51:18,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:18,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:18,966 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:19,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:19,167 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:19,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1022624813, now seen corresponding path program 26 times [2021-07-09 17:51:19,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:19,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890068051] [2021-07-09 17:51:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:19,186 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 17:51:19,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:19,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890068051] [2021-07-09 17:51:19,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890068051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:19,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639253883] [2021-07-09 17:51:19,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:19,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:19,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:19,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:19,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:19,282 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 17:51:19,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639253883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:19,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:19,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:51:19,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361790338] [2021-07-09 17:51:19,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:19,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:19,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:19,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:19,283 INFO L87 Difference]: Start difference. First operand 2206 states and 9447 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:19,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:19,450 INFO L93 Difference]: Finished difference Result 5842 states and 23522 transitions. [2021-07-09 17:51:19,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:51:19,450 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:19,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:19,463 INFO L225 Difference]: With dead ends: 5842 [2021-07-09 17:51:19,463 INFO L226 Difference]: Without dead ends: 5604 [2021-07-09 17:51:19,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:51:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2021-07-09 17:51:19,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 3077. [2021-07-09 17:51:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 4.447009102730819) internal successors, (13679), 3076 states have internal predecessors, (13679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 13679 transitions. [2021-07-09 17:51:19,572 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 13679 transitions. Word has length 28 [2021-07-09 17:51:19,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:19,572 INFO L482 AbstractCegarLoop]: Abstraction has 3077 states and 13679 transitions. [2021-07-09 17:51:19,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 13679 transitions. [2021-07-09 17:51:19,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:19,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:19,579 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:19,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:19,779 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:19,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:19,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1332519461, now seen corresponding path program 27 times [2021-07-09 17:51:19,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:19,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248432216] [2021-07-09 17:51:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:19,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:19,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248432216] [2021-07-09 17:51:19,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248432216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:19,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656872160] [2021-07-09 17:51:19,808 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 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 17:51:19,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:51:19,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:19,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:19,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:19,930 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 17:51:19,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656872160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:19,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:19,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:51:19,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351514596] [2021-07-09 17:51:19,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:19,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:19,931 INFO L87 Difference]: Start difference. First operand 3077 states and 13679 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:20,182 INFO L93 Difference]: Finished difference Result 5963 states and 23745 transitions. [2021-07-09 17:51:20,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:51:20,182 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:20,195 INFO L225 Difference]: With dead ends: 5963 [2021-07-09 17:51:20,196 INFO L226 Difference]: Without dead ends: 5804 [2021-07-09 17:51:20,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:51:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2021-07-09 17:51:20,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 2984. [2021-07-09 17:51:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2983 states have (on average 4.44217230975528) internal successors, (13251), 2983 states have internal predecessors, (13251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 13251 transitions. [2021-07-09 17:51:20,270 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 13251 transitions. Word has length 28 [2021-07-09 17:51:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:20,270 INFO L482 AbstractCegarLoop]: Abstraction has 2984 states and 13251 transitions. [2021-07-09 17:51:20,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 13251 transitions. [2021-07-09 17:51:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:20,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:20,276 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:20,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-09 17:51:20,476 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:20,477 INFO L82 PathProgramCache]: Analyzing trace with hash 80086205, now seen corresponding path program 28 times [2021-07-09 17:51:20,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:20,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395784976] [2021-07-09 17:51:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:20,499 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 17:51:20,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:20,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395784976] [2021-07-09 17:51:20,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395784976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:20,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057228650] [2021-07-09 17:51:20,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:20,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:20,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:20,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:20,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:20,606 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 17:51:20,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057228650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:20,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:20,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:51:20,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275255642] [2021-07-09 17:51:20,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:51:20,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:20,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:51:20,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:51:20,607 INFO L87 Difference]: Start difference. First operand 2984 states and 13251 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:20,900 INFO L93 Difference]: Finished difference Result 5675 states and 22909 transitions. [2021-07-09 17:51:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:20,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:20,913 INFO L225 Difference]: With dead ends: 5675 [2021-07-09 17:51:20,913 INFO L226 Difference]: Without dead ends: 5594 [2021-07-09 17:51:20,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:51:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5594 states. [2021-07-09 17:51:20,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5594 to 3213. [2021-07-09 17:51:20,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 4.452988792029888) internal successors, (14303), 3212 states have internal predecessors, (14303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 14303 transitions. [2021-07-09 17:51:20,994 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 14303 transitions. Word has length 28 [2021-07-09 17:51:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:20,994 INFO L482 AbstractCegarLoop]: Abstraction has 3213 states and 14303 transitions. [2021-07-09 17:51:20,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:20,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 14303 transitions. [2021-07-09 17:51:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:21,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:21,001 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:21,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-09 17:51:21,201 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:21,202 INFO L82 PathProgramCache]: Analyzing trace with hash -156949847, now seen corresponding path program 29 times [2021-07-09 17:51:21,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:21,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113284945] [2021-07-09 17:51:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:21,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:21,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113284945] [2021-07-09 17:51:21,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113284945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:21,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202388354] [2021-07-09 17:51:21,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:21,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:51:21,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:21,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:21,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:21,315 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 17:51:21,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202388354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:21,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:21,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:51:21,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923693929] [2021-07-09 17:51:21,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:21,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:21,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:21,316 INFO L87 Difference]: Start difference. First operand 3213 states and 14303 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:21,523 INFO L93 Difference]: Finished difference Result 5452 states and 22207 transitions. [2021-07-09 17:51:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:51:21,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:21,534 INFO L225 Difference]: With dead ends: 5452 [2021-07-09 17:51:21,535 INFO L226 Difference]: Without dead ends: 5364 [2021-07-09 17:51:21,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:21,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2021-07-09 17:51:21,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 3341. [2021-07-09 17:51:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 4.440718562874252) internal successors, (14832), 3340 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:21,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 14832 transitions. [2021-07-09 17:51:21,618 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 14832 transitions. Word has length 28 [2021-07-09 17:51:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:21,619 INFO L482 AbstractCegarLoop]: Abstraction has 3341 states and 14832 transitions. [2021-07-09 17:51:21,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 14832 transitions. [2021-07-09 17:51:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:21,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:21,626 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:21,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 17:51:21,843 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:21,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1316063575, now seen corresponding path program 30 times [2021-07-09 17:51:21,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:21,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058478616] [2021-07-09 17:51:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:21,867 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 17:51:21,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:21,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058478616] [2021-07-09 17:51:21,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058478616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:21,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201859082] [2021-07-09 17:51:21,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:21,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:51:21,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:21,977 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 17:51:21,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201859082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:21,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:21,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:51:21,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366073245] [2021-07-09 17:51:21,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:21,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:21,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:21,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:21,978 INFO L87 Difference]: Start difference. First operand 3341 states and 14832 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:22,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:22,148 INFO L93 Difference]: Finished difference Result 4165 states and 17900 transitions. [2021-07-09 17:51:22,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:51:22,148 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:22,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:22,160 INFO L225 Difference]: With dead ends: 4165 [2021-07-09 17:51:22,160 INFO L226 Difference]: Without dead ends: 4165 [2021-07-09 17:51:22,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:51:22,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-07-09 17:51:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3293. [2021-07-09 17:51:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 3292 states have (on average 4.427703523693803) internal successors, (14576), 3292 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 14576 transitions. [2021-07-09 17:51:22,234 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 14576 transitions. Word has length 28 [2021-07-09 17:51:22,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:22,234 INFO L482 AbstractCegarLoop]: Abstraction has 3293 states and 14576 transitions. [2021-07-09 17:51:22,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 14576 transitions. [2021-07-09 17:51:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:22,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:22,242 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:22,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-09 17:51:22,442 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:22,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:22,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1040039817, now seen corresponding path program 31 times [2021-07-09 17:51:22,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:22,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751851878] [2021-07-09 17:51:22,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:22,472 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 17:51:22,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:22,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751851878] [2021-07-09 17:51:22,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751851878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:22,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636237491] [2021-07-09 17:51:22,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:22,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:22,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:22,583 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 17:51:22,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636237491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:22,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:22,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:51:22,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345107408] [2021-07-09 17:51:22,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:22,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:22,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:22,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:22,584 INFO L87 Difference]: Start difference. First operand 3293 states and 14576 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:22,839 INFO L93 Difference]: Finished difference Result 6120 states and 24890 transitions. [2021-07-09 17:51:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:22,839 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:22,853 INFO L225 Difference]: With dead ends: 6120 [2021-07-09 17:51:22,853 INFO L226 Difference]: Without dead ends: 6031 [2021-07-09 17:51:22,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:22,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6031 states. [2021-07-09 17:51:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6031 to 3429. [2021-07-09 17:51:22,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 4.4518669778296385) internal successors, (15261), 3428 states have internal predecessors, (15261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 15261 transitions. [2021-07-09 17:51:22,938 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 15261 transitions. Word has length 28 [2021-07-09 17:51:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:22,938 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 15261 transitions. [2021-07-09 17:51:22,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 15261 transitions. [2021-07-09 17:51:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:22,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:22,945 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:23,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:23,161 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:23,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1402272981, now seen corresponding path program 32 times [2021-07-09 17:51:23,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:23,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448636085] [2021-07-09 17:51:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:23,183 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 17:51:23,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:23,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448636085] [2021-07-09 17:51:23,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448636085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:23,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875211250] [2021-07-09 17:51:23,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:23,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:23,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:23,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:23,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:23,280 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 17:51:23,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875211250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:23,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:23,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:51:23,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878749067] [2021-07-09 17:51:23,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:23,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:23,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:23,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:23,281 INFO L87 Difference]: Start difference. First operand 3429 states and 15261 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:23,444 INFO L93 Difference]: Finished difference Result 5654 states and 23169 transitions. [2021-07-09 17:51:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:51:23,444 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:23,462 INFO L225 Difference]: With dead ends: 5654 [2021-07-09 17:51:23,462 INFO L226 Difference]: Without dead ends: 5416 [2021-07-09 17:51:23,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:51:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5416 states. [2021-07-09 17:51:23,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5416 to 3560. [2021-07-09 17:51:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3560 states, 3559 states have (on average 4.421747681933128) internal successors, (15737), 3559 states have internal predecessors, (15737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3560 states to 3560 states and 15737 transitions. [2021-07-09 17:51:23,584 INFO L78 Accepts]: Start accepts. Automaton has 3560 states and 15737 transitions. Word has length 28 [2021-07-09 17:51:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:23,585 INFO L482 AbstractCegarLoop]: Abstraction has 3560 states and 15737 transitions. [2021-07-09 17:51:23,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3560 states and 15737 transitions. [2021-07-09 17:51:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:23,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:23,593 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:23,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:23,809 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:23,809 INFO L82 PathProgramCache]: Analyzing trace with hash -952871293, now seen corresponding path program 33 times [2021-07-09 17:51:23,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:23,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219871829] [2021-07-09 17:51:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:23,829 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 17:51:23,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219871829] [2021-07-09 17:51:23,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219871829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001093677] [2021-07-09 17:51:23,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:23,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:51:23,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:23,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:23,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:23,935 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 17:51:23,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001093677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:23,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:23,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:51:23,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869958402] [2021-07-09 17:51:23,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:23,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:23,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:23,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:23,936 INFO L87 Difference]: Start difference. First operand 3560 states and 15737 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:24,153 INFO L93 Difference]: Finished difference Result 4955 states and 20688 transitions. [2021-07-09 17:51:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:51:24,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:24,167 INFO L225 Difference]: With dead ends: 4955 [2021-07-09 17:51:24,167 INFO L226 Difference]: Without dead ends: 4857 [2021-07-09 17:51:24,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4857 states. [2021-07-09 17:51:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4857 to 3479. [2021-07-09 17:51:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 4.4399079930994825) internal successors, (15442), 3478 states have internal predecessors, (15442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 15442 transitions. [2021-07-09 17:51:24,238 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 15442 transitions. Word has length 28 [2021-07-09 17:51:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:24,238 INFO L482 AbstractCegarLoop]: Abstraction has 3479 states and 15442 transitions. [2021-07-09 17:51:24,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 15442 transitions. [2021-07-09 17:51:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:24,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:24,244 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:24,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:24,445 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:24,445 INFO L82 PathProgramCache]: Analyzing trace with hash -121098667, now seen corresponding path program 34 times [2021-07-09 17:51:24,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:24,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927196660] [2021-07-09 17:51:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:24,466 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 17:51:24,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:24,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927196660] [2021-07-09 17:51:24,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927196660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:24,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225696764] [2021-07-09 17:51:24,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:24,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:24,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:24,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:24,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:24,556 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 17:51:24,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225696764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:24,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:24,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:51:24,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482440841] [2021-07-09 17:51:24,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:24,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:24,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:24,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:24,557 INFO L87 Difference]: Start difference. First operand 3479 states and 15442 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:24,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:24,730 INFO L93 Difference]: Finished difference Result 5688 states and 23360 transitions. [2021-07-09 17:51:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:51:24,730 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:24,744 INFO L225 Difference]: With dead ends: 5688 [2021-07-09 17:51:24,745 INFO L226 Difference]: Without dead ends: 5374 [2021-07-09 17:51:24,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:51:24,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5374 states. [2021-07-09 17:51:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5374 to 3228. [2021-07-09 17:51:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 4.4465447784319805) internal successors, (14349), 3227 states have internal predecessors, (14349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 14349 transitions. [2021-07-09 17:51:24,825 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 14349 transitions. Word has length 28 [2021-07-09 17:51:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:24,825 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 14349 transitions. [2021-07-09 17:51:24,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 14349 transitions. [2021-07-09 17:51:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:24,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:24,833 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:25,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:25,033 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:25,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:25,033 INFO L82 PathProgramCache]: Analyzing trace with hash 73354585, now seen corresponding path program 35 times [2021-07-09 17:51:25,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:25,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017820903] [2021-07-09 17:51:25,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:25,054 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 17:51:25,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:25,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017820903] [2021-07-09 17:51:25,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017820903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:25,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344302470] [2021-07-09 17:51:25,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:25,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:51:25,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:25,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:25,145 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 17:51:25,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344302470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:25,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:25,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:51:25,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659031850] [2021-07-09 17:51:25,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:51:25,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:25,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:51:25,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:51:25,146 INFO L87 Difference]: Start difference. First operand 3228 states and 14349 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:25,287 INFO L93 Difference]: Finished difference Result 3905 states and 17063 transitions. [2021-07-09 17:51:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:51:25,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:25,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:25,297 INFO L225 Difference]: With dead ends: 3905 [2021-07-09 17:51:25,297 INFO L226 Difference]: Without dead ends: 3862 [2021-07-09 17:51:25,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:51:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-07-09 17:51:25,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3217. [2021-07-09 17:51:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 3216 states have (on average 4.453980099502488) internal successors, (14324), 3216 states have internal predecessors, (14324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 14324 transitions. [2021-07-09 17:51:25,354 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 14324 transitions. Word has length 28 [2021-07-09 17:51:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:25,354 INFO L482 AbstractCegarLoop]: Abstraction has 3217 states and 14324 transitions. [2021-07-09 17:51:25,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 14324 transitions. [2021-07-09 17:51:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:25,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:25,361 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:25,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:25,561 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:25,561 INFO L82 PathProgramCache]: Analyzing trace with hash -161141625, now seen corresponding path program 36 times [2021-07-09 17:51:25,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:25,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918576593] [2021-07-09 17:51:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:25,584 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 17:51:25,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:25,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918576593] [2021-07-09 17:51:25,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918576593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:25,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219510333] [2021-07-09 17:51:25,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:25,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:51:25,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:25,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:25,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:25,669 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 17:51:25,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219510333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:25,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:25,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:51:25,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135011802] [2021-07-09 17:51:25,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:51:25,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:25,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:51:25,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:51:25,670 INFO L87 Difference]: Start difference. First operand 3217 states and 14324 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:25,765 INFO L93 Difference]: Finished difference Result 4261 states and 18540 transitions. [2021-07-09 17:51:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:51:25,765 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:25,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:25,776 INFO L225 Difference]: With dead ends: 4261 [2021-07-09 17:51:25,776 INFO L226 Difference]: Without dead ends: 4261 [2021-07-09 17:51:25,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:51:25,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-07-09 17:51:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3247. [2021-07-09 17:51:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3246 states have (on average 4.457486136783734) internal successors, (14469), 3246 states have internal predecessors, (14469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 14469 transitions. [2021-07-09 17:51:25,834 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 14469 transitions. Word has length 28 [2021-07-09 17:51:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:25,835 INFO L482 AbstractCegarLoop]: Abstraction has 3247 states and 14469 transitions. [2021-07-09 17:51:25,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 14469 transitions. [2021-07-09 17:51:25,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:25,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:25,841 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:26,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-07-09 17:51:26,041 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:26,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:26,042 INFO L82 PathProgramCache]: Analyzing trace with hash -544432577, now seen corresponding path program 37 times [2021-07-09 17:51:26,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:26,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408475763] [2021-07-09 17:51:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:26,063 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 17:51:26,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:26,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408475763] [2021-07-09 17:51:26,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408475763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:26,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218664004] [2021-07-09 17:51:26,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:26,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:26,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:26,160 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 17:51:26,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218664004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:26,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:26,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:51:26,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926417994] [2021-07-09 17:51:26,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:51:26,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:26,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:51:26,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:51:26,161 INFO L87 Difference]: Start difference. First operand 3247 states and 14469 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:26,425 INFO L93 Difference]: Finished difference Result 5371 states and 22050 transitions. [2021-07-09 17:51:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:26,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:26,440 INFO L225 Difference]: With dead ends: 5371 [2021-07-09 17:51:26,440 INFO L226 Difference]: Without dead ends: 5194 [2021-07-09 17:51:26,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:51:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-07-09 17:51:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 3332. [2021-07-09 17:51:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 4.473431401981387) internal successors, (14901), 3331 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 14901 transitions. [2021-07-09 17:51:26,542 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 14901 transitions. Word has length 28 [2021-07-09 17:51:26,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:26,542 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 14901 transitions. [2021-07-09 17:51:26,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:26,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 14901 transitions. [2021-07-09 17:51:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:26,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:26,549 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:26,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-09 17:51:26,751 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:26,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1703546305, now seen corresponding path program 38 times [2021-07-09 17:51:26,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:26,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773559442] [2021-07-09 17:51:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:26,801 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 17:51:26,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:26,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773559442] [2021-07-09 17:51:26,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773559442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:26,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986350707] [2021-07-09 17:51:26,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:26,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:26,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:26,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:26,918 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 17:51:26,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986350707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:26,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:26,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:51:26,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454824369] [2021-07-09 17:51:26,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:51:26,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:26,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:51:26,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:51:26,919 INFO L87 Difference]: Start difference. First operand 3332 states and 14901 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:27,102 INFO L93 Difference]: Finished difference Result 4983 states and 20920 transitions. [2021-07-09 17:51:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:51:27,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:27,113 INFO L225 Difference]: With dead ends: 4983 [2021-07-09 17:51:27,113 INFO L226 Difference]: Without dead ends: 4684 [2021-07-09 17:51:27,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:51:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2021-07-09 17:51:27,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 3540. [2021-07-09 17:51:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 4.495620231703871) internal successors, (15910), 3539 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 15910 transitions. [2021-07-09 17:51:27,189 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 15910 transitions. Word has length 28 [2021-07-09 17:51:27,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:27,189 INFO L482 AbstractCegarLoop]: Abstraction has 3540 states and 15910 transitions. [2021-07-09 17:51:27,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 15910 transitions. [2021-07-09 17:51:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:27,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:27,196 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:27,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-09 17:51:27,397 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1340354023, now seen corresponding path program 39 times [2021-07-09 17:51:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:27,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924104812] [2021-07-09 17:51:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:27,414 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 17:51:27,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:27,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924104812] [2021-07-09 17:51:27,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924104812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:27,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478361552] [2021-07-09 17:51:27,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:27,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:51:27,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:27,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:27,510 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 17:51:27,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478361552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:27,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:27,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:51:27,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739944984] [2021-07-09 17:51:27,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:27,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:27,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:27,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:27,511 INFO L87 Difference]: Start difference. First operand 3540 states and 15910 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:27,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:27,727 INFO L93 Difference]: Finished difference Result 4609 states and 19684 transitions. [2021-07-09 17:51:27,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:51:27,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:27,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:27,738 INFO L225 Difference]: With dead ends: 4609 [2021-07-09 17:51:27,738 INFO L226 Difference]: Without dead ends: 4511 [2021-07-09 17:51:27,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:51:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-07-09 17:51:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3315. [2021-07-09 17:51:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 4.492757996378998) internal successors, (14889), 3314 states have internal predecessors, (14889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 14889 transitions. [2021-07-09 17:51:27,802 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 14889 transitions. Word has length 28 [2021-07-09 17:51:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:27,802 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 14889 transitions. [2021-07-09 17:51:27,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 14889 transitions. [2021-07-09 17:51:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:27,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:27,809 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:28,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-09 17:51:28,010 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash -508581397, now seen corresponding path program 40 times [2021-07-09 17:51:28,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:28,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171100604] [2021-07-09 17:51:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:28,027 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 17:51:28,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:28,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171100604] [2021-07-09 17:51:28,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171100604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:28,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726857134] [2021-07-09 17:51:28,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:28,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:28,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:28,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:28,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:28,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726857134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:28,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:28,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:51:28,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683316999] [2021-07-09 17:51:28,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:28,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:28,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:28,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:28,123 INFO L87 Difference]: Start difference. First operand 3315 states and 14889 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:28,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:28,317 INFO L93 Difference]: Finished difference Result 6217 states and 25682 transitions. [2021-07-09 17:51:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:51:28,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:28,331 INFO L225 Difference]: With dead ends: 6217 [2021-07-09 17:51:28,332 INFO L226 Difference]: Without dead ends: 5965 [2021-07-09 17:51:28,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:51:28,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2021-07-09 17:51:28,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 3606. [2021-07-09 17:51:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 4.471844660194175) internal successors, (16121), 3605 states have internal predecessors, (16121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 16121 transitions. [2021-07-09 17:51:28,418 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 16121 transitions. Word has length 28 [2021-07-09 17:51:28,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:28,418 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 16121 transitions. [2021-07-09 17:51:28,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 16121 transitions. [2021-07-09 17:51:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:28,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:28,425 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:28,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-09 17:51:28,625 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:28,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:28,626 INFO L82 PathProgramCache]: Analyzing trace with hash 436881771, now seen corresponding path program 41 times [2021-07-09 17:51:28,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:28,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441435515] [2021-07-09 17:51:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:28,657 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 17:51:28,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:28,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441435515] [2021-07-09 17:51:28,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441435515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:28,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028828663] [2021-07-09 17:51:28,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:28,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:51:28,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:28,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:28,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:28,754 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 17:51:28,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028828663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:28,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:28,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:51:28,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535118953] [2021-07-09 17:51:28,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:28,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:28,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:28,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:28,755 INFO L87 Difference]: Start difference. First operand 3606 states and 16121 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:28,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:28,983 INFO L93 Difference]: Finished difference Result 5105 states and 21497 transitions. [2021-07-09 17:51:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:51:28,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:28,995 INFO L225 Difference]: With dead ends: 5105 [2021-07-09 17:51:28,995 INFO L226 Difference]: Without dead ends: 5016 [2021-07-09 17:51:28,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:29,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5016 states. [2021-07-09 17:51:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5016 to 3555. [2021-07-09 17:51:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 4.498030388294879) internal successors, (15986), 3554 states have internal predecessors, (15986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 15986 transitions. [2021-07-09 17:51:29,066 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 15986 transitions. Word has length 28 [2021-07-09 17:51:29,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:29,066 INFO L482 AbstractCegarLoop]: Abstraction has 3555 states and 15986 transitions. [2021-07-09 17:51:29,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 15986 transitions. [2021-07-09 17:51:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:29,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:29,073 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:29,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-07-09 17:51:29,275 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:29,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:29,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1415772727, now seen corresponding path program 42 times [2021-07-09 17:51:29,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:29,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740197247] [2021-07-09 17:51:29,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:29,293 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 17:51:29,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:29,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740197247] [2021-07-09 17:51:29,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740197247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:29,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121351039] [2021-07-09 17:51:29,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:29,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:51:29,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:29,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:29,398 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 17:51:29,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121351039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:29,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:29,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:51:29,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459305707] [2021-07-09 17:51:29,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:29,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:29,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:29,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:29,399 INFO L87 Difference]: Start difference. First operand 3555 states and 15986 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:29,566 INFO L93 Difference]: Finished difference Result 6625 states and 28035 transitions. [2021-07-09 17:51:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:51:29,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:29,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:29,582 INFO L225 Difference]: With dead ends: 6625 [2021-07-09 17:51:29,582 INFO L226 Difference]: Without dead ends: 6387 [2021-07-09 17:51:29,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:51:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2021-07-09 17:51:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 4277. [2021-07-09 17:51:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4277 states, 4276 states have (on average 4.543966323666979) internal successors, (19430), 4276 states have internal predecessors, (19430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4277 states to 4277 states and 19430 transitions. [2021-07-09 17:51:29,723 INFO L78 Accepts]: Start accepts. Automaton has 4277 states and 19430 transitions. Word has length 28 [2021-07-09 17:51:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:29,723 INFO L482 AbstractCegarLoop]: Abstraction has 4277 states and 19430 transitions. [2021-07-09 17:51:29,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states and 19430 transitions. [2021-07-09 17:51:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:29,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:29,732 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:29,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:29,944 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:29,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:29,945 INFO L82 PathProgramCache]: Analyzing trace with hash 524050295, now seen corresponding path program 43 times [2021-07-09 17:51:29,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:29,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132941777] [2021-07-09 17:51:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:29,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:29,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132941777] [2021-07-09 17:51:29,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132941777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:29,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656206492] [2021-07-09 17:51:29,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:30,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:30,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:30,099 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 17:51:30,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656206492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:30,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:30,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:51:30,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452494515] [2021-07-09 17:51:30,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:30,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:30,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:30,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:30,100 INFO L87 Difference]: Start difference. First operand 4277 states and 19430 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:30,341 INFO L93 Difference]: Finished difference Result 6394 states and 27162 transitions. [2021-07-09 17:51:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:51:30,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:30,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:30,358 INFO L225 Difference]: With dead ends: 6394 [2021-07-09 17:51:30,358 INFO L226 Difference]: Without dead ends: 6243 [2021-07-09 17:51:30,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:51:30,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2021-07-09 17:51:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 3807. [2021-07-09 17:51:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3806 states have (on average 4.512348922753547) internal successors, (17174), 3806 states have internal predecessors, (17174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 17174 transitions. [2021-07-09 17:51:30,446 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 17174 transitions. Word has length 28 [2021-07-09 17:51:30,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:30,446 INFO L482 AbstractCegarLoop]: Abstraction has 3807 states and 17174 transitions. [2021-07-09 17:51:30,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:30,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 17174 transitions. [2021-07-09 17:51:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:30,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:30,454 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:30,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:30,654 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:30,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1936655961, now seen corresponding path program 44 times [2021-07-09 17:51:30,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:30,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337531146] [2021-07-09 17:51:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:30,676 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 17:51:30,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:30,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337531146] [2021-07-09 17:51:30,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337531146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:30,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557576732] [2021-07-09 17:51:30,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:30,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:30,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:30,779 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 17:51:30,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557576732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:30,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:30,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:51:30,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57189840] [2021-07-09 17:51:30,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:51:30,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:30,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:51:30,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:51:30,780 INFO L87 Difference]: Start difference. First operand 3807 states and 17174 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:31,001 INFO L93 Difference]: Finished difference Result 5996 states and 25523 transitions. [2021-07-09 17:51:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:51:31,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:31,015 INFO L225 Difference]: With dead ends: 5996 [2021-07-09 17:51:31,015 INFO L226 Difference]: Without dead ends: 5915 [2021-07-09 17:51:31,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-07-09 17:51:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 3582. [2021-07-09 17:51:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 3581 states have (on average 4.499301870985758) internal successors, (16112), 3581 states have internal predecessors, (16112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 16112 transitions. [2021-07-09 17:51:31,093 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 16112 transitions. Word has length 28 [2021-07-09 17:51:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:31,093 INFO L482 AbstractCegarLoop]: Abstraction has 3582 states and 16112 transitions. [2021-07-09 17:51:31,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:31,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 16112 transitions. [2021-07-09 17:51:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:31,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:31,099 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:31,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:31,300 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1708748389, now seen corresponding path program 45 times [2021-07-09 17:51:31,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:31,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148813782] [2021-07-09 17:51:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:31,321 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 17:51:31,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:31,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148813782] [2021-07-09 17:51:31,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148813782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:31,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423539327] [2021-07-09 17:51:31,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:31,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:51:31,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:31,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:31,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:31,412 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 17:51:31,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423539327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:31,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:31,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:51:31,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735998755] [2021-07-09 17:51:31,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:31,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:31,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:31,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:31,413 INFO L87 Difference]: Start difference. First operand 3582 states and 16112 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:31,665 INFO L93 Difference]: Finished difference Result 6117 states and 25799 transitions. [2021-07-09 17:51:31,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:51:31,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:31,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:31,681 INFO L225 Difference]: With dead ends: 6117 [2021-07-09 17:51:31,681 INFO L226 Difference]: Without dead ends: 6028 [2021-07-09 17:51:31,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:51:31,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2021-07-09 17:51:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 3578. [2021-07-09 17:51:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 4.48616158792284) internal successors, (16047), 3577 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 16047 transitions. [2021-07-09 17:51:31,763 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 16047 transitions. Word has length 28 [2021-07-09 17:51:31,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:31,763 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 16047 transitions. [2021-07-09 17:51:31,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 16047 transitions. [2021-07-09 17:51:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:31,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:31,770 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:31,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:31,970 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:31,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:31,971 INFO L82 PathProgramCache]: Analyzing trace with hash 733564409, now seen corresponding path program 46 times [2021-07-09 17:51:31,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:31,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063209936] [2021-07-09 17:51:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:31,992 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 17:51:31,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:31,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063209936] [2021-07-09 17:51:31,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063209936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:31,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996145235] [2021-07-09 17:51:31,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:51:32,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:32,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:32,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:32,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:32,083 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 17:51:32,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996145235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:32,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:32,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:51:32,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571428346] [2021-07-09 17:51:32,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:32,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:32,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:32,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:32,084 INFO L87 Difference]: Start difference. First operand 3578 states and 16047 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:32,269 INFO L93 Difference]: Finished difference Result 7695 states and 32562 transitions. [2021-07-09 17:51:32,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:51:32,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:32,288 INFO L225 Difference]: With dead ends: 7695 [2021-07-09 17:51:32,289 INFO L226 Difference]: Without dead ends: 7457 [2021-07-09 17:51:32,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:51:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7457 states. [2021-07-09 17:51:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7457 to 3898. [2021-07-09 17:51:32,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3898 states, 3897 states have (on average 4.497818835001283) internal successors, (17528), 3897 states have internal predecessors, (17528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3898 states to 3898 states and 17528 transitions. [2021-07-09 17:51:32,388 INFO L78 Accepts]: Start accepts. Automaton has 3898 states and 17528 transitions. Word has length 28 [2021-07-09 17:51:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:32,388 INFO L482 AbstractCegarLoop]: Abstraction has 3898 states and 17528 transitions. [2021-07-09 17:51:32,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3898 states and 17528 transitions. [2021-07-09 17:51:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:32,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:32,396 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] [2021-07-09 17:51:32,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:32,596 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:32,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1621579865, now seen corresponding path program 47 times [2021-07-09 17:51:32,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:32,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377811188] [2021-07-09 17:51:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:32,618 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 17:51:32,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:32,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377811188] [2021-07-09 17:51:32,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377811188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:32,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933383223] [2021-07-09 17:51:32,618 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 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 17:51:32,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:32,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:32,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:32,707 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 17:51:32,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933383223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:32,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:32,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:51:32,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458066466] [2021-07-09 17:51:32,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:32,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:32,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:32,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:32,708 INFO L87 Difference]: Start difference. First operand 3898 states and 17528 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:32,961 INFO L93 Difference]: Finished difference Result 7529 states and 31905 transitions. [2021-07-09 17:51:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:32,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:32,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:32,980 INFO L225 Difference]: With dead ends: 7529 [2021-07-09 17:51:32,980 INFO L226 Difference]: Without dead ends: 7378 [2021-07-09 17:51:32,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-07-09 17:51:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 3667. [2021-07-09 17:51:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3667 states, 3666 states have (on average 4.480087288597927) internal successors, (16424), 3666 states have internal predecessors, (16424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3667 states to 3667 states and 16424 transitions. [2021-07-09 17:51:33,110 INFO L78 Accepts]: Start accepts. Automaton has 3667 states and 16424 transitions. Word has length 28 [2021-07-09 17:51:33,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:33,110 INFO L482 AbstractCegarLoop]: Abstraction has 3667 states and 16424 transitions. [2021-07-09 17:51:33,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:33,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3667 states and 16424 transitions. [2021-07-09 17:51:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:33,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:33,117 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:33,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:33,318 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash -789807239, now seen corresponding path program 48 times [2021-07-09 17:51:33,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:33,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386505438] [2021-07-09 17:51:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:33,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:33,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386505438] [2021-07-09 17:51:33,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386505438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:33,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788956087] [2021-07-09 17:51:33,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:33,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:51:33,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:33,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:33,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788956087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:33,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:33,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:51:33,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817424316] [2021-07-09 17:51:33,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:33,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:33,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:33,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:33,435 INFO L87 Difference]: Start difference. First operand 3667 states and 16424 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:33,620 INFO L93 Difference]: Finished difference Result 5684 states and 23777 transitions. [2021-07-09 17:51:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:51:33,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:33,634 INFO L225 Difference]: With dead ends: 5684 [2021-07-09 17:51:33,635 INFO L226 Difference]: Without dead ends: 5684 [2021-07-09 17:51:33,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:51:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2021-07-09 17:51:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 3830. [2021-07-09 17:51:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3829 states have (on average 4.469051971794202) internal successors, (17112), 3829 states have internal predecessors, (17112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:33,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 17112 transitions. [2021-07-09 17:51:33,719 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 17112 transitions. Word has length 28 [2021-07-09 17:51:33,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:33,719 INFO L482 AbstractCegarLoop]: Abstraction has 3830 states and 17112 transitions. [2021-07-09 17:51:33,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 17112 transitions. [2021-07-09 17:51:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:33,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:33,727 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:33,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-07-09 17:51:33,928 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:33,928 INFO L82 PathProgramCache]: Analyzing trace with hash -208974199, now seen corresponding path program 49 times [2021-07-09 17:51:33,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:33,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672198537] [2021-07-09 17:51:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:33,949 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 17:51:33,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:33,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672198537] [2021-07-09 17:51:33,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672198537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:33,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869029721] [2021-07-09 17:51:33,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:33,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:33,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:34,037 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 17:51:34,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869029721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:34,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:34,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:51:34,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251600157] [2021-07-09 17:51:34,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:34,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:34,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:34,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:34,038 INFO L87 Difference]: Start difference. First operand 3830 states and 17112 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:34,240 INFO L93 Difference]: Finished difference Result 5383 states and 22901 transitions. [2021-07-09 17:51:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:51:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:34,253 INFO L225 Difference]: With dead ends: 5383 [2021-07-09 17:51:34,253 INFO L226 Difference]: Without dead ends: 5301 [2021-07-09 17:51:34,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:51:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-07-09 17:51:34,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 3809. [2021-07-09 17:51:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3809 states, 3808 states have (on average 4.473214285714286) internal successors, (17034), 3808 states have internal predecessors, (17034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:34,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3809 states to 3809 states and 17034 transitions. [2021-07-09 17:51:34,329 INFO L78 Accepts]: Start accepts. Automaton has 3809 states and 17034 transitions. Word has length 28 [2021-07-09 17:51:34,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:34,330 INFO L482 AbstractCegarLoop]: Abstraction has 3809 states and 17034 transitions. [2021-07-09 17:51:34,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:34,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3809 states and 17034 transitions. [2021-07-09 17:51:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:34,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:34,337 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:34,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-09 17:51:34,538 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash 23729685, now seen corresponding path program 50 times [2021-07-09 17:51:34,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:34,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196199792] [2021-07-09 17:51:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:34,559 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 17:51:34,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:34,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196199792] [2021-07-09 17:51:34,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196199792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:34,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893090273] [2021-07-09 17:51:34,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:34,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:34,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:34,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:34,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:34,650 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 17:51:34,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893090273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:34,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:34,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:51:34,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444520336] [2021-07-09 17:51:34,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:51:34,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:34,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:51:34,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:51:34,651 INFO L87 Difference]: Start difference. First operand 3809 states and 17034 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:34,750 INFO L93 Difference]: Finished difference Result 4345 states and 19174 transitions. [2021-07-09 17:51:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:51:34,750 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:34,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:34,760 INFO L225 Difference]: With dead ends: 4345 [2021-07-09 17:51:34,761 INFO L226 Difference]: Without dead ends: 4282 [2021-07-09 17:51:34,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:51:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2021-07-09 17:51:34,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3786. [2021-07-09 17:51:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3785 states have (on average 4.484808454425363) internal successors, (16975), 3785 states have internal predecessors, (16975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 16975 transitions. [2021-07-09 17:51:34,850 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 16975 transitions. Word has length 28 [2021-07-09 17:51:34,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:34,850 INFO L482 AbstractCegarLoop]: Abstraction has 3786 states and 16975 transitions. [2021-07-09 17:51:34,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:34,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 16975 transitions. [2021-07-09 17:51:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:51:34,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:34,858 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:35,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-09 17:51:35,073 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash 881575195, now seen corresponding path program 51 times [2021-07-09 17:51:35,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:35,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913944389] [2021-07-09 17:51:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:35,096 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 17:51:35,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:35,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913944389] [2021-07-09 17:51:35,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913944389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:35,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360995947] [2021-07-09 17:51:35,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:35,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:51:35,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:35,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:51:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:35,177 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 17:51:35,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360995947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:35,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:35,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:51:35,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013734939] [2021-07-09 17:51:35,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:51:35,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:35,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:51:35,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:51:35,178 INFO L87 Difference]: Start difference. First operand 3786 states and 16975 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:35,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:35,281 INFO L93 Difference]: Finished difference Result 4570 states and 20136 transitions. [2021-07-09 17:51:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:51:35,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:51:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:35,292 INFO L225 Difference]: With dead ends: 4570 [2021-07-09 17:51:35,292 INFO L226 Difference]: Without dead ends: 4570 [2021-07-09 17:51:35,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:51:35,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2021-07-09 17:51:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 3804. [2021-07-09 17:51:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.494083618196161) internal successors, (17091), 3803 states have internal predecessors, (17091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:35,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 17091 transitions. [2021-07-09 17:51:35,361 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 17091 transitions. Word has length 28 [2021-07-09 17:51:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:35,362 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 17091 transitions. [2021-07-09 17:51:35,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:35,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 17091 transitions. [2021-07-09 17:51:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:51:35,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:35,369 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:35,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:35,571 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:35,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:35,571 INFO L82 PathProgramCache]: Analyzing trace with hash -125713404, now seen corresponding path program 52 times [2021-07-09 17:51:35,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:35,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550776298] [2021-07-09 17:51:35,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:35,791 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 17:51:35,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:35,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550776298] [2021-07-09 17:51:35,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550776298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:35,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355750513] [2021-07-09 17:51:35,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:35,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:35,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:51:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:36,021 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 17:51:36,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:36,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:36,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:36,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-09 17:51:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:36,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355750513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:36,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:36,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:51:36,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765640639] [2021-07-09 17:51:36,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:36,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:36,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:36,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:36,069 INFO L87 Difference]: Start difference. First operand 3804 states and 17091 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:37,361 INFO L93 Difference]: Finished difference Result 5745 states and 25057 transitions. [2021-07-09 17:51:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:51:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:51:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:37,376 INFO L225 Difference]: With dead ends: 5745 [2021-07-09 17:51:37,376 INFO L226 Difference]: Without dead ends: 5664 [2021-07-09 17:51:37,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 858.5ms TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:51:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5664 states. [2021-07-09 17:51:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5664 to 3903. [2021-07-09 17:51:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.478728856996412) internal successors, (17476), 3902 states have internal predecessors, (17476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 17476 transitions. [2021-07-09 17:51:37,453 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 17476 transitions. Word has length 30 [2021-07-09 17:51:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:37,454 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 17476 transitions. [2021-07-09 17:51:37,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:37,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 17476 transitions. [2021-07-09 17:51:37,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:51:37,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:37,461 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:37,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-07-09 17:51:37,665 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:37,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1179025990, now seen corresponding path program 1 times [2021-07-09 17:51:37,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:37,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012582027] [2021-07-09 17:51:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:37,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:37,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012582027] [2021-07-09 17:51:37,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012582027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:37,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272167383] [2021-07-09 17:51:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:37,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:51:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:38,064 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 17:51:38,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:38,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:38,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:38,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:51:38,102 INFO 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 17:51:38,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272167383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:38,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:38,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:51:38,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619267035] [2021-07-09 17:51:38,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:38,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:38,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:38,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:38,103 INFO L87 Difference]: Start difference. First operand 3903 states and 17476 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:39,396 INFO L93 Difference]: Finished difference Result 5395 states and 23651 transitions. [2021-07-09 17:51:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:51:39,397 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:51:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:39,410 INFO L225 Difference]: With dead ends: 5395 [2021-07-09 17:51:39,411 INFO L226 Difference]: Without dead ends: 5314 [2021-07-09 17:51:39,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 850.7ms TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:51:39,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2021-07-09 17:51:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 3889. [2021-07-09 17:51:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3888 states have (on average 4.484310699588478) internal successors, (17435), 3888 states have internal predecessors, (17435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:39,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 17435 transitions. [2021-07-09 17:51:39,490 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 17435 transitions. Word has length 30 [2021-07-09 17:51:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:39,490 INFO L482 AbstractCegarLoop]: Abstraction has 3889 states and 17435 transitions. [2021-07-09 17:51:39,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:39,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 17435 transitions. [2021-07-09 17:51:39,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:51:39,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:39,498 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:39,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:39,698 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:39,699 INFO L82 PathProgramCache]: Analyzing trace with hash 523971232, now seen corresponding path program 2 times [2021-07-09 17:51:39,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:39,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616668282] [2021-07-09 17:51:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:39,874 INFO 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 17:51:39,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:39,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616668282] [2021-07-09 17:51:39,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616668282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:39,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136122929] [2021-07-09 17:51:39,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:39,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:39,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:39,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:51:39,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:51:40,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,127 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-09 17:51:40,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:40,135 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 17:51:40,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-07-09 17:51:40,193 INFO 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 17:51:40,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136122929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:40,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:40,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 17:51:40,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364472815] [2021-07-09 17:51:40,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:51:40,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:40,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:51:40,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:51:40,194 INFO L87 Difference]: Start difference. First operand 3889 states and 17435 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:41,524 INFO L93 Difference]: Finished difference Result 5211 states and 22782 transitions. [2021-07-09 17:51:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:51:41,524 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:51:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:41,536 INFO L225 Difference]: With dead ends: 5211 [2021-07-09 17:51:41,537 INFO L226 Difference]: Without dead ends: 5130 [2021-07-09 17:51:41,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 911.3ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:51:41,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5130 states. [2021-07-09 17:51:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5130 to 3899. [2021-07-09 17:51:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.482555156490508) internal successors, (17473), 3898 states have internal predecessors, (17473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:41,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 17473 transitions. [2021-07-09 17:51:41,613 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 17473 transitions. Word has length 30 [2021-07-09 17:51:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:41,614 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 17473 transitions. [2021-07-09 17:51:41,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 17473 transitions. [2021-07-09 17:51:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:51:41,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:41,621 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:41,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:41,822 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:41,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:41,822 INFO L82 PathProgramCache]: Analyzing trace with hash 17624966, now seen corresponding path program 3 times [2021-07-09 17:51:41,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:41,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813843505] [2021-07-09 17:51:41,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:42,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:42,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813843505] [2021-07-09 17:51:42,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813843505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:42,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234939107] [2021-07-09 17:51:42,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:42,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:51:42,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:42,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:51:42,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:42,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:51:42,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:42,245 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 17:51:42,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:42,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:42,252 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 17:51:42,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-07-09 17:51:42,310 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 17:51:42,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234939107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:42,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:42,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 17:51:42,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789110551] [2021-07-09 17:51:42,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:51:42,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:42,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:51:42,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:51:42,311 INFO L87 Difference]: Start difference. First operand 3899 states and 17473 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:43,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:43,729 INFO L93 Difference]: Finished difference Result 5249 states and 22919 transitions. [2021-07-09 17:51:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:51:43,729 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:51:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:43,742 INFO L225 Difference]: With dead ends: 5249 [2021-07-09 17:51:43,742 INFO L226 Difference]: Without dead ends: 5176 [2021-07-09 17:51:43,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 937.8ms TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:51:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-07-09 17:51:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3875. [2021-07-09 17:51:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 4.489416623644812) internal successors, (17392), 3874 states have internal predecessors, (17392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 17392 transitions. [2021-07-09 17:51:43,819 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 17392 transitions. Word has length 30 [2021-07-09 17:51:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:43,819 INFO L482 AbstractCegarLoop]: Abstraction has 3875 states and 17392 transitions. [2021-07-09 17:51:43,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 17392 transitions. [2021-07-09 17:51:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:51:43,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:43,826 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:44,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:44,027 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:44,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2020102972, now seen corresponding path program 21 times [2021-07-09 17:51:44,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:44,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039460960] [2021-07-09 17:51:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:44,238 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 17:51:44,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:44,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039460960] [2021-07-09 17:51:44,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039460960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:44,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828297588] [2021-07-09 17:51:44,238 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 17:51:44,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:51:44,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:44,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:51:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:44,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:51:44,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:51:44,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:44,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:44,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-09 17:51:44,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:44,636 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-09 17:51:44,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:44,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-09 17:51:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:44,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828297588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:44,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:44,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-07-09 17:51:44,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139262493] [2021-07-09 17:51:44,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:51:44,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:44,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:51:44,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:51:44,695 INFO L87 Difference]: Start difference. First operand 3875 states and 17392 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:46,102 INFO L93 Difference]: Finished difference Result 4957 states and 21263 transitions. [2021-07-09 17:51:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:51:46,102 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:51:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:46,114 INFO L225 Difference]: With dead ends: 4957 [2021-07-09 17:51:46,115 INFO L226 Difference]: Without dead ends: 4795 [2021-07-09 17:51:46,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 896.4ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:51:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2021-07-09 17:51:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 3949. [2021-07-09 17:51:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3949 states, 3948 states have (on average 4.4693515704154) internal successors, (17645), 3948 states have internal predecessors, (17645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3949 states to 3949 states and 17645 transitions. [2021-07-09 17:51:46,189 INFO L78 Accepts]: Start accepts. Automaton has 3949 states and 17645 transitions. Word has length 30 [2021-07-09 17:51:46,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:46,189 INFO L482 AbstractCegarLoop]: Abstraction has 3949 states and 17645 transitions. [2021-07-09 17:51:46,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:46,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3949 states and 17645 transitions. [2021-07-09 17:51:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:51:46,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:46,197 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:46,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:46,397 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:46,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:46,398 INFO L82 PathProgramCache]: Analyzing trace with hash -334675676, now seen corresponding path program 4 times [2021-07-09 17:51:46,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:46,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940371569] [2021-07-09 17:51:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:46,592 INFO 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 17:51:46,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:46,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940371569] [2021-07-09 17:51:46,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940371569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:46,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30078586] [2021-07-09 17:51:46,593 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 17:51:46,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:46,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:46,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:51:46,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:46,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:51:46,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:46,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:46,871 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 17:51:46,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:46,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:46,880 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 17:51:46,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-09 17:51:46,929 INFO 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 17:51:46,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30078586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:46,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:46,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 17:51:46,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267515004] [2021-07-09 17:51:46,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:46,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:46,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:46,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:46,930 INFO L87 Difference]: Start difference. First operand 3949 states and 17645 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:48,046 INFO L93 Difference]: Finished difference Result 4626 states and 20349 transitions. [2021-07-09 17:51:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:51:48,046 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:51:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:48,057 INFO L225 Difference]: With dead ends: 4626 [2021-07-09 17:51:48,057 INFO L226 Difference]: Without dead ends: 4553 [2021-07-09 17:51:48,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:51:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4553 states. [2021-07-09 17:51:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4553 to 3969. [2021-07-09 17:51:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3969 states, 3968 states have (on average 4.465977822580645) internal successors, (17721), 3968 states have internal predecessors, (17721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3969 states to 3969 states and 17721 transitions. [2021-07-09 17:51:48,129 INFO L78 Accepts]: Start accepts. Automaton has 3969 states and 17721 transitions. Word has length 30 [2021-07-09 17:51:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:48,129 INFO L482 AbstractCegarLoop]: Abstraction has 3969 states and 17721 transitions. [2021-07-09 17:51:48,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3969 states and 17721 transitions. [2021-07-09 17:51:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:51:48,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:48,137 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] [2021-07-09 17:51:48,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:48,337 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1057468870, now seen corresponding path program 5 times [2021-07-09 17:51:48,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:48,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475310883] [2021-07-09 17:51:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:48,558 INFO 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 17:51:48,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:48,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475310883] [2021-07-09 17:51:48,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475310883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:48,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264312097] [2021-07-09 17:51:48,559 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 17:51:48,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:51:48,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:48,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:51:48,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:48,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:51:48,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:48,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:48,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 17:51:48,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:48,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:48,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:48,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-09 17:51:48,892 INFO 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 17:51:48,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264312097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:48,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:48,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 17:51:48,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131515123] [2021-07-09 17:51:48,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:48,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:48,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:48,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:48,893 INFO L87 Difference]: Start difference. First operand 3969 states and 17721 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:49,945 INFO L93 Difference]: Finished difference Result 4613 states and 20313 transitions. [2021-07-09 17:51:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:49,945 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:51:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:49,957 INFO L225 Difference]: With dead ends: 4613 [2021-07-09 17:51:49,957 INFO L226 Difference]: Without dead ends: 4532 [2021-07-09 17:51:49,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:51:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2021-07-09 17:51:50,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 3979. [2021-07-09 17:51:50,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 3978 states have (on average 4.464303670186023) internal successors, (17759), 3978 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 17759 transitions. [2021-07-09 17:51:50,056 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 17759 transitions. Word has length 30 [2021-07-09 17:51:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:50,056 INFO L482 AbstractCegarLoop]: Abstraction has 3979 states and 17759 transitions. [2021-07-09 17:51:50,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 17759 transitions. [2021-07-09 17:51:50,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:51:50,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:50,064 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:50,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:50,264 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:50,265 INFO L82 PathProgramCache]: Analyzing trace with hash 551122604, now seen corresponding path program 6 times [2021-07-09 17:51:50,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:50,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851414967] [2021-07-09 17:51:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:50,498 INFO 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 17:51:50,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:50,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851414967] [2021-07-09 17:51:50,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851414967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:50,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698783495] [2021-07-09 17:51:50,498 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 17:51:50,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:51:50,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:50,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:51:50,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:50,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:51:50,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:51:50,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:51:50,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:50,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-07-09 17:51:50,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:51:50,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:50,821 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 17:51:50,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:24 [2021-07-09 17:51:50,944 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 17:51:50,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698783495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:50,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:50,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-09 17:51:50,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321485257] [2021-07-09 17:51:50,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:51:50,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:50,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:51:50,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:51:50,945 INFO L87 Difference]: Start difference. First operand 3979 states and 17759 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:52,445 INFO L93 Difference]: Finished difference Result 4720 states and 20746 transitions. [2021-07-09 17:51:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:51:52,446 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:51:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:52,458 INFO L225 Difference]: With dead ends: 4720 [2021-07-09 17:51:52,458 INFO L226 Difference]: Without dead ends: 4639 [2021-07-09 17:51:52,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 986.3ms TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:51:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-07-09 17:51:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 3979. [2021-07-09 17:51:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 3978 states have (on average 4.464303670186023) internal successors, (17759), 3978 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 17759 transitions. [2021-07-09 17:51:52,528 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 17759 transitions. Word has length 30 [2021-07-09 17:51:52,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:52,528 INFO L482 AbstractCegarLoop]: Abstraction has 3979 states and 17759 transitions. [2021-07-09 17:51:52,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 17759 transitions. [2021-07-09 17:51:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:51:52,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:52,536 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:52,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:52,737 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:52,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:52,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1727284940, now seen corresponding path program 22 times [2021-07-09 17:51:52,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:52,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215576359] [2021-07-09 17:51:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:52,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:52,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215576359] [2021-07-09 17:51:52,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215576359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:52,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958428033] [2021-07-09 17:51:52,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:53,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:53,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:53,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:51:53,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:53,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:51:53,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 17:51:53,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:53,218 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 17:51:53,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-09 17:51:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:53,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958428033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:53,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:53,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:51:53,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820256083] [2021-07-09 17:51:53,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:51:53,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:53,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:51:53,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:53,267 INFO L87 Difference]: Start difference. First operand 3979 states and 17759 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:55,400 INFO L93 Difference]: Finished difference Result 5261 states and 22917 transitions. [2021-07-09 17:51:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:51:55,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:51:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:55,413 INFO L225 Difference]: With dead ends: 5261 [2021-07-09 17:51:55,414 INFO L226 Difference]: Without dead ends: 5069 [2021-07-09 17:51:55,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1274.0ms TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:51:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-07-09 17:51:55,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 4014. [2021-07-09 17:51:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4013 states have (on average 4.46922501868926) internal successors, (17935), 4013 states have internal predecessors, (17935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 17935 transitions. [2021-07-09 17:51:55,493 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 17935 transitions. Word has length 30 [2021-07-09 17:51:55,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:55,493 INFO L482 AbstractCegarLoop]: Abstraction has 4014 states and 17935 transitions. [2021-07-09 17:51:55,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 17935 transitions. [2021-07-09 17:51:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:51:55,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:55,501 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:55,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:55,701 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:55,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash 300371958, now seen corresponding path program 7 times [2021-07-09 17:51:55,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:55,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068291114] [2021-07-09 17:51:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:55,909 INFO 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 17:51:55,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:55,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068291114] [2021-07-09 17:51:55,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068291114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:55,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619393358] [2021-07-09 17:51:55,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:55,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:51:55,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:56,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:51:56,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:56,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:56,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 17:51:56,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:56,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:56,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:56,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-09 17:51:56,221 INFO 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 17:51:56,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619393358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:56,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:56,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:51:56,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839844903] [2021-07-09 17:51:56,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:51:56,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:56,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:51:56,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:51:56,222 INFO L87 Difference]: Start difference. First operand 4014 states and 17935 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:57,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:57,390 INFO L93 Difference]: Finished difference Result 4912 states and 21474 transitions. [2021-07-09 17:51:57,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:51:57,390 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:51:57,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:57,403 INFO L225 Difference]: With dead ends: 4912 [2021-07-09 17:51:57,404 INFO L226 Difference]: Without dead ends: 4839 [2021-07-09 17:51:57,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 752.5ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:51:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2021-07-09 17:51:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 3996. [2021-07-09 17:51:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3995 states have (on average 4.473091364205256) internal successors, (17870), 3995 states have internal predecessors, (17870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 17870 transitions. [2021-07-09 17:51:57,482 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 17870 transitions. Word has length 30 [2021-07-09 17:51:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:57,482 INFO L482 AbstractCegarLoop]: Abstraction has 3996 states and 17870 transitions. [2021-07-09 17:51:57,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 17870 transitions. [2021-07-09 17:51:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:51:57,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:57,490 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:57,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:57,690 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:57,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2133407234, now seen corresponding path program 53 times [2021-07-09 17:51:57,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:57,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174921626] [2021-07-09 17:51:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:57,870 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 17:51:57,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:57,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174921626] [2021-07-09 17:51:57,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174921626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:57,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810266081] [2021-07-09 17:51:57,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:57,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:51:57,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:57,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:51:57,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:58,084 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 17:51:58,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:58,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:58,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:58,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:51:58,127 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 17:51:58,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810266081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:58,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:58,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:51:58,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840861545] [2021-07-09 17:51:58,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:58,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:58,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:58,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:58,128 INFO L87 Difference]: Start difference. First operand 3996 states and 17870 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:59,618 INFO L93 Difference]: Finished difference Result 6208 states and 26833 transitions. [2021-07-09 17:51:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:51:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:51:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:59,633 INFO L225 Difference]: With dead ends: 6208 [2021-07-09 17:51:59,634 INFO L226 Difference]: Without dead ends: 6026 [2021-07-09 17:51:59,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1001.9ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:51:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6026 states. [2021-07-09 17:51:59,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6026 to 4094. [2021-07-09 17:51:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4093 states have (on average 4.472269728805277) internal successors, (18305), 4093 states have internal predecessors, (18305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 18305 transitions. [2021-07-09 17:51:59,724 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 18305 transitions. Word has length 30 [2021-07-09 17:51:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:59,724 INFO L482 AbstractCegarLoop]: Abstraction has 4094 states and 18305 transitions. [2021-07-09 17:51:59,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 18305 transitions. [2021-07-09 17:51:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:51:59,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:59,732 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:59,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-07-09 17:51:59,932 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:59,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:59,933 INFO L82 PathProgramCache]: Analyzing trace with hash -856820668, now seen corresponding path program 8 times [2021-07-09 17:51:59,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:59,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654663401] [2021-07-09 17:51:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:00,136 INFO 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 17:52:00,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:00,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654663401] [2021-07-09 17:52:00,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654663401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:00,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009165893] [2021-07-09 17:52:00,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:00,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:00,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:00,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:00,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:00,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:00,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:00,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:00,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-07-09 17:52:00,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:00,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:00,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:00,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-07-09 17:52:00,492 INFO 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 17:52:00,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009165893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:00,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:00,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:52:00,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400623518] [2021-07-09 17:52:00,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:52:00,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:52:00,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:52:00,493 INFO L87 Difference]: Start difference. First operand 4094 states and 18305 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:02,681 INFO L93 Difference]: Finished difference Result 5912 states and 25340 transitions. [2021-07-09 17:52:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 17:52:02,681 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:02,696 INFO L225 Difference]: With dead ends: 5912 [2021-07-09 17:52:02,696 INFO L226 Difference]: Without dead ends: 5564 [2021-07-09 17:52:02,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1585.2ms TimeCoverageRelationStatistics Valid=412, Invalid=3010, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:52:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-07-09 17:52:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 4100. [2021-07-09 17:52:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4100 states, 4099 states have (on average 4.47011466211271) internal successors, (18323), 4099 states have internal predecessors, (18323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4100 states to 4100 states and 18323 transitions. [2021-07-09 17:52:02,777 INFO L78 Accepts]: Start accepts. Automaton has 4100 states and 18323 transitions. Word has length 30 [2021-07-09 17:52:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:02,777 INFO L482 AbstractCegarLoop]: Abstraction has 4100 states and 18323 transitions. [2021-07-09 17:52:02,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4100 states and 18323 transitions. [2021-07-09 17:52:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:02,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:02,785 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:02,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:02,986 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:02,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:02,986 INFO L82 PathProgramCache]: Analyzing trace with hash 950991776, now seen corresponding path program 54 times [2021-07-09 17:52:02,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:02,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141249239] [2021-07-09 17:52:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:03,196 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 17:52:03,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:03,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141249239] [2021-07-09 17:52:03,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141249239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:03,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509443691] [2021-07-09 17:52:03,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:03,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:52:03,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:03,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:52:03,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:03,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:03,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 17:52:03,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:03,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:03,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:03,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:52:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:03,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509443691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:03,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:03,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:52:03,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448417351] [2021-07-09 17:52:03,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:03,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:03,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:03,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:03,571 INFO L87 Difference]: Start difference. First operand 4100 states and 18323 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:05,418 INFO L93 Difference]: Finished difference Result 6189 states and 26443 transitions. [2021-07-09 17:52:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:52:05,418 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:05,434 INFO L225 Difference]: With dead ends: 6189 [2021-07-09 17:52:05,434 INFO L226 Difference]: Without dead ends: 5993 [2021-07-09 17:52:05,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1405.4ms TimeCoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:52:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5993 states. [2021-07-09 17:52:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5993 to 4143. [2021-07-09 17:52:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4143 states, 4142 states have (on average 4.466441332689522) internal successors, (18500), 4142 states have internal predecessors, (18500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 18500 transitions. [2021-07-09 17:52:05,543 INFO L78 Accepts]: Start accepts. Automaton has 4143 states and 18500 transitions. Word has length 30 [2021-07-09 17:52:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:05,543 INFO L482 AbstractCegarLoop]: Abstraction has 4143 states and 18500 transitions. [2021-07-09 17:52:05,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4143 states and 18500 transitions. [2021-07-09 17:52:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:05,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:05,551 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:05,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-09 17:52:05,752 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1791203576, now seen corresponding path program 55 times [2021-07-09 17:52:05,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:05,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337152919] [2021-07-09 17:52:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:05,950 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 17:52:05,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:05,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337152919] [2021-07-09 17:52:05,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337152919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:05,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828031066] [2021-07-09 17:52:05,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:05,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:05,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:06,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:52:06,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:06,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:06,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:06,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:52:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:06,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828031066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:06,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:06,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:52:06,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812412626] [2021-07-09 17:52:06,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:52:06,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:06,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:52:06,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:52:06,176 INFO L87 Difference]: Start difference. First operand 4143 states and 18500 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:07,721 INFO L93 Difference]: Finished difference Result 6154 states and 26681 transitions. [2021-07-09 17:52:07,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:52:07,722 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:07,736 INFO L225 Difference]: With dead ends: 6154 [2021-07-09 17:52:07,736 INFO L226 Difference]: Without dead ends: 6072 [2021-07-09 17:52:07,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1222.1ms TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:52:07,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2021-07-09 17:52:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 4139. [2021-07-09 17:52:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 4.467133881101982) internal successors, (18485), 4138 states have internal predecessors, (18485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 18485 transitions. [2021-07-09 17:52:07,817 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 18485 transitions. Word has length 30 [2021-07-09 17:52:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:07,817 INFO L482 AbstractCegarLoop]: Abstraction has 4139 states and 18485 transitions. [2021-07-09 17:52:07,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 18485 transitions. [2021-07-09 17:52:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:07,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:07,825 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:08,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-09 17:52:08,026 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:08,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:08,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1215498078, now seen corresponding path program 9 times [2021-07-09 17:52:08,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:08,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293707144] [2021-07-09 17:52:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:08,267 INFO 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 17:52:08,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:08,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293707144] [2021-07-09 17:52:08,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293707144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:08,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225413685] [2021-07-09 17:52:08,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:08,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:52:08,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:08,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:52:08,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:08,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:08,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 17:52:08,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:08,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:08,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:08,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:52:08,598 INFO 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 17:52:08,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225413685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:08,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:08,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:52:08,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449729667] [2021-07-09 17:52:08,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:08,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:08,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:08,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:08,599 INFO L87 Difference]: Start difference. First operand 4139 states and 18485 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:10,866 INFO L93 Difference]: Finished difference Result 5882 states and 25230 transitions. [2021-07-09 17:52:10,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:52:10,867 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:10,881 INFO L225 Difference]: With dead ends: 5882 [2021-07-09 17:52:10,881 INFO L226 Difference]: Without dead ends: 5569 [2021-07-09 17:52:10,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1684.7ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:52:10,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5569 states. [2021-07-09 17:52:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5569 to 4166. [2021-07-09 17:52:10,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4165 states have (on average 4.465546218487395) internal successors, (18599), 4165 states have internal predecessors, (18599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 18599 transitions. [2021-07-09 17:52:10,963 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 18599 transitions. Word has length 30 [2021-07-09 17:52:10,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:10,963 INFO L482 AbstractCegarLoop]: Abstraction has 4166 states and 18599 transitions. [2021-07-09 17:52:10,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:10,963 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 18599 transitions. [2021-07-09 17:52:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:10,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:10,971 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:11,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-07-09 17:52:11,172 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:11,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1683882142, now seen corresponding path program 10 times [2021-07-09 17:52:11,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:11,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489433393] [2021-07-09 17:52:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:11,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:11,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489433393] [2021-07-09 17:52:11,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489433393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:11,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655765301] [2021-07-09 17:52:11,388 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 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 17:52:11,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:11,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:11,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:11,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:11,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:52:11,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:11,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:11,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:11,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:52:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:11,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655765301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:11,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:11,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:52:11,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843601478] [2021-07-09 17:52:11,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:52:11,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:11,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:52:11,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:52:11,636 INFO L87 Difference]: Start difference. First operand 4166 states and 18599 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:13,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:13,789 INFO L93 Difference]: Finished difference Result 5721 states and 24904 transitions. [2021-07-09 17:52:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:52:13,790 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:13,805 INFO L225 Difference]: With dead ends: 5721 [2021-07-09 17:52:13,805 INFO L226 Difference]: Without dead ends: 5638 [2021-07-09 17:52:13,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1622.0ms TimeCoverageRelationStatistics Valid=489, Invalid=2703, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:52:13,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-07-09 17:52:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4157. [2021-07-09 17:52:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4157 states, 4156 states have (on average 4.467516843118383) internal successors, (18567), 4156 states have internal predecessors, (18567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4157 states to 4157 states and 18567 transitions. [2021-07-09 17:52:13,932 INFO L78 Accepts]: Start accepts. Automaton has 4157 states and 18567 transitions. Word has length 30 [2021-07-09 17:52:13,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:13,932 INFO L482 AbstractCegarLoop]: Abstraction has 4157 states and 18567 transitions. [2021-07-09 17:52:13,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4157 states and 18567 transitions. [2021-07-09 17:52:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:13,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:13,940 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:14,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:14,140 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:14,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:14,141 INFO L82 PathProgramCache]: Analyzing trace with hash -301373590, now seen corresponding path program 56 times [2021-07-09 17:52:14,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:14,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362464762] [2021-07-09 17:52:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:14,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:14,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362464762] [2021-07-09 17:52:14,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362464762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:14,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032663323] [2021-07-09 17:52:14,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:14,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:14,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:14,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:14,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:14,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:14,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:14,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:14,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-07-09 17:52:14,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:14,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:14,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:14,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-07-09 17:52:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:14,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032663323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:14,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:14,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:52:14,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064334037] [2021-07-09 17:52:14,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:52:14,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:14,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:52:14,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:52:14,635 INFO L87 Difference]: Start difference. First operand 4157 states and 18567 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:16,753 INFO L93 Difference]: Finished difference Result 6423 states and 27371 transitions. [2021-07-09 17:52:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 17:52:16,753 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:16,769 INFO L225 Difference]: With dead ends: 6423 [2021-07-09 17:52:16,769 INFO L226 Difference]: Without dead ends: 6097 [2021-07-09 17:52:16,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1302.9ms TimeCoverageRelationStatistics Valid=386, Invalid=2694, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:52:16,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6097 states. [2021-07-09 17:52:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6097 to 4207. [2021-07-09 17:52:16,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 4.46528768426058) internal successors, (18781), 4206 states have internal predecessors, (18781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 18781 transitions. [2021-07-09 17:52:16,857 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 18781 transitions. Word has length 30 [2021-07-09 17:52:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:16,857 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 18781 transitions. [2021-07-09 17:52:16,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:16,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 18781 transitions. [2021-07-09 17:52:16,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:16,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:16,865 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:17,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:17,065 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1003365804, now seen corresponding path program 11 times [2021-07-09 17:52:17,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:17,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361570766] [2021-07-09 17:52:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:17,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:17,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361570766] [2021-07-09 17:52:17,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361570766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:17,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023972017] [2021-07-09 17:52:17,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:17,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:52:17,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:17,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:17,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:17,466 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 17:52:17,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:17,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:17,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:17,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:52:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:17,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023972017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:17,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:17,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:52:17,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42011619] [2021-07-09 17:52:17,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:17,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:17,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:17,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:17,504 INFO L87 Difference]: Start difference. First operand 4207 states and 18781 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:19,167 INFO L93 Difference]: Finished difference Result 6015 states and 26020 transitions. [2021-07-09 17:52:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:52:19,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:19,182 INFO L225 Difference]: With dead ends: 6015 [2021-07-09 17:52:19,182 INFO L226 Difference]: Without dead ends: 5833 [2021-07-09 17:52:19,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1093.8ms TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:52:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2021-07-09 17:52:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 4239. [2021-07-09 17:52:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 4238 states have (on average 4.460830580462482) internal successors, (18905), 4238 states have internal predecessors, (18905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 18905 transitions. [2021-07-09 17:52:19,266 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 18905 transitions. Word has length 30 [2021-07-09 17:52:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:19,267 INFO L482 AbstractCegarLoop]: Abstraction has 4239 states and 18905 transitions. [2021-07-09 17:52:19,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 18905 transitions. [2021-07-09 17:52:19,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:19,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:19,275 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:19,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-09 17:52:19,475 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash -620043988, now seen corresponding path program 12 times [2021-07-09 17:52:19,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:19,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688830648] [2021-07-09 17:52:19,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:19,657 INFO 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 17:52:19,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:19,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688830648] [2021-07-09 17:52:19,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688830648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:19,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981298518] [2021-07-09 17:52:19,657 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 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 17:52:19,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:52:19,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:19,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:19,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:19,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:19,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:19,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:19,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-07-09 17:52:19,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:19,919 INFO L628 ElimStorePlain]: treesize reduction 27, result has 52.6 percent of original size [2021-07-09 17:52:19,921 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 17:52:19,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:24 [2021-07-09 17:52:20,020 INFO 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 17:52:20,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981298518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:20,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:20,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:52:20,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444661732] [2021-07-09 17:52:20,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:52:20,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:20,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:52:20,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:52:20,021 INFO L87 Difference]: Start difference. First operand 4239 states and 18905 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:21,737 INFO L93 Difference]: Finished difference Result 5775 states and 24871 transitions. [2021-07-09 17:52:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:52:21,737 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:21,751 INFO L225 Difference]: With dead ends: 5775 [2021-07-09 17:52:21,751 INFO L226 Difference]: Without dead ends: 5492 [2021-07-09 17:52:21,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1115.6ms TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:52:21,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5492 states. [2021-07-09 17:52:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5492 to 4251. [2021-07-09 17:52:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4251 states, 4250 states have (on average 4.459764705882353) internal successors, (18954), 4250 states have internal predecessors, (18954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4251 states to 4251 states and 18954 transitions. [2021-07-09 17:52:21,837 INFO L78 Accepts]: Start accepts. Automaton has 4251 states and 18954 transitions. Word has length 30 [2021-07-09 17:52:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:21,838 INFO L482 AbstractCegarLoop]: Abstraction has 4251 states and 18954 transitions. [2021-07-09 17:52:21,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4251 states and 18954 transitions. [2021-07-09 17:52:21,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:21,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:21,846 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:22,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-09 17:52:22,047 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:22,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1126390254, now seen corresponding path program 13 times [2021-07-09 17:52:22,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:22,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577041955] [2021-07-09 17:52:22,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:22,229 INFO 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 17:52:22,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:22,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577041955] [2021-07-09 17:52:22,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577041955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:22,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368849142] [2021-07-09 17:52:22,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:22,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:22,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:52:22,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:22,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:22,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:22,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-09 17:52:22,457 INFO 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 17:52:22,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368849142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:22,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:22,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:52:22,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417120016] [2021-07-09 17:52:22,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:22,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:22,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:22,458 INFO L87 Difference]: Start difference. First operand 4251 states and 18954 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:24,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:24,016 INFO L93 Difference]: Finished difference Result 5808 states and 25286 transitions. [2021-07-09 17:52:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:52:24,016 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:24,036 INFO L225 Difference]: With dead ends: 5808 [2021-07-09 17:52:24,036 INFO L226 Difference]: Without dead ends: 5709 [2021-07-09 17:52:24,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1028.0ms TimeCoverageRelationStatistics Valid=328, Invalid=1742, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:52:24,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5709 states. [2021-07-09 17:52:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5709 to 4219. [2021-07-09 17:52:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4219 states, 4218 states have (on average 4.463963963963964) internal successors, (18829), 4218 states have internal predecessors, (18829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4219 states to 4219 states and 18829 transitions. [2021-07-09 17:52:24,139 INFO L78 Accepts]: Start accepts. Automaton has 4219 states and 18829 transitions. Word has length 30 [2021-07-09 17:52:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:24,140 INFO L482 AbstractCegarLoop]: Abstraction has 4219 states and 18829 transitions. [2021-07-09 17:52:24,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4219 states and 18829 transitions. [2021-07-09 17:52:24,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:24,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:24,148 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:24,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:24,348 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:24,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1630177144, now seen corresponding path program 14 times [2021-07-09 17:52:24,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:24,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727849971] [2021-07-09 17:52:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:24,540 INFO 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 17:52:24,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:24,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727849971] [2021-07-09 17:52:24,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727849971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:24,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236028466] [2021-07-09 17:52:24,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:24,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:24,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:24,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:52:24,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:24,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:24,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 17:52:24,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:24,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:24,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:24,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:52:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:24,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236028466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:24,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:24,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:52:24,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372009610] [2021-07-09 17:52:24,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:24,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:24,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:24,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:24,877 INFO L87 Difference]: Start difference. First operand 4219 states and 18829 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:27,366 INFO L93 Difference]: Finished difference Result 5840 states and 25153 transitions. [2021-07-09 17:52:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 17:52:27,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:27,381 INFO L225 Difference]: With dead ends: 5840 [2021-07-09 17:52:27,381 INFO L226 Difference]: Without dead ends: 5684 [2021-07-09 17:52:27,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1789.3ms TimeCoverageRelationStatistics Valid=423, Invalid=2999, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:52:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2021-07-09 17:52:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 4234. [2021-07-09 17:52:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 4.462556106780061) internal successors, (18890), 4233 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 18890 transitions. [2021-07-09 17:52:27,465 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 18890 transitions. Word has length 30 [2021-07-09 17:52:27,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:27,465 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 18890 transitions. [2021-07-09 17:52:27,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:27,465 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 18890 transitions. [2021-07-09 17:52:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:27,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:27,473 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:27,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-07-09 17:52:27,673 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:27,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:27,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1269203076, now seen corresponding path program 15 times [2021-07-09 17:52:27,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:27,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368922158] [2021-07-09 17:52:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:27,933 INFO 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 17:52:27,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:27,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368922158] [2021-07-09 17:52:27,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368922158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:27,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673894908] [2021-07-09 17:52:27,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:27,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:52:27,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:27,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:52:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:28,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:28,105 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 17:52:28,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:28,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:28,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:28,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:52:28,253 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 17:52:28,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673894908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:28,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:28,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:52:28,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032334306] [2021-07-09 17:52:28,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:28,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:28,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:28,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:28,253 INFO L87 Difference]: Start difference. First operand 4234 states and 18890 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:30,704 INFO L93 Difference]: Finished difference Result 6056 states and 26106 transitions. [2021-07-09 17:52:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 17:52:30,704 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:30,719 INFO L225 Difference]: With dead ends: 6056 [2021-07-09 17:52:30,719 INFO L226 Difference]: Without dead ends: 5858 [2021-07-09 17:52:30,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1945.4ms TimeCoverageRelationStatistics Valid=517, Invalid=3143, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 17:52:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5858 states. [2021-07-09 17:52:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5858 to 4234. [2021-07-09 17:52:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 4.462556106780061) internal successors, (18890), 4233 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 18890 transitions. [2021-07-09 17:52:30,810 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 18890 transitions. Word has length 30 [2021-07-09 17:52:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:30,810 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 18890 transitions. [2021-07-09 17:52:30,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 18890 transitions. [2021-07-09 17:52:30,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:30,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:30,818 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:31,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:31,018 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:31,019 INFO L82 PathProgramCache]: Analyzing trace with hash 905499490, now seen corresponding path program 16 times [2021-07-09 17:52:31,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:31,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142052617] [2021-07-09 17:52:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:31,231 INFO 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 17:52:31,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:31,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142052617] [2021-07-09 17:52:31,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142052617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:31,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693688555] [2021-07-09 17:52:31,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:31,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:31,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:31,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:31,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:31,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:52:31,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:31,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:31,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:31,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:52:31,471 INFO 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 17:52:31,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693688555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:31,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:31,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:52:31,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950290542] [2021-07-09 17:52:31,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:52:31,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:31,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:52:31,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:52:31,472 INFO L87 Difference]: Start difference. First operand 4234 states and 18890 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:32,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:32,984 INFO L93 Difference]: Finished difference Result 5452 states and 23785 transitions. [2021-07-09 17:52:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:52:32,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:32,998 INFO L225 Difference]: With dead ends: 5452 [2021-07-09 17:52:32,998 INFO L226 Difference]: Without dead ends: 5379 [2021-07-09 17:52:32,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1118.9ms TimeCoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:52:33,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5379 states. [2021-07-09 17:52:33,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5379 to 4239. [2021-07-09 17:52:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 4238 states have (on average 4.4624823029731004) internal successors, (18912), 4238 states have internal predecessors, (18912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 18912 transitions. [2021-07-09 17:52:33,119 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 18912 transitions. Word has length 30 [2021-07-09 17:52:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:33,119 INFO L482 AbstractCegarLoop]: Abstraction has 4239 states and 18912 transitions. [2021-07-09 17:52:33,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 18912 transitions. [2021-07-09 17:52:33,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:33,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:33,127 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:33,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-09 17:52:33,328 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:33,328 INFO L82 PathProgramCache]: Analyzing trace with hash 372742508, now seen corresponding path program 17 times [2021-07-09 17:52:33,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:33,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983213641] [2021-07-09 17:52:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:33,505 INFO 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 17:52:33,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:33,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983213641] [2021-07-09 17:52:33,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983213641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:33,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716722450] [2021-07-09 17:52:33,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:33,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:52:33,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:33,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:33,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:33,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:33,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:33,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:33,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-09 17:52:33,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:33,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:33,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:33,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:94 [2021-07-09 17:52:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:33,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716722450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:33,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:33,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 17:52:33,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97386484] [2021-07-09 17:52:33,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:33,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:33,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:33,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:33,943 INFO L87 Difference]: Start difference. First operand 4239 states and 18912 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:35,288 INFO L93 Difference]: Finished difference Result 5163 states and 22549 transitions. [2021-07-09 17:52:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:52:35,289 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:35,302 INFO L225 Difference]: With dead ends: 5163 [2021-07-09 17:52:35,302 INFO L226 Difference]: Without dead ends: 5104 [2021-07-09 17:52:35,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1069.5ms TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:52:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2021-07-09 17:52:35,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4237. [2021-07-09 17:52:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4236 states have (on average 4.4627006610009445) internal successors, (18904), 4236 states have internal predecessors, (18904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 18904 transitions. [2021-07-09 17:52:35,408 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 18904 transitions. Word has length 30 [2021-07-09 17:52:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:35,408 INFO L482 AbstractCegarLoop]: Abstraction has 4237 states and 18904 transitions. [2021-07-09 17:52:35,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 18904 transitions. [2021-07-09 17:52:35,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:35,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:35,417 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:35,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-07-09 17:52:35,617 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:35,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:35,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1254276420, now seen corresponding path program 18 times [2021-07-09 17:52:35,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:35,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204946564] [2021-07-09 17:52:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:35,775 INFO 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 17:52:35,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:35,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204946564] [2021-07-09 17:52:35,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204946564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:35,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742723671] [2021-07-09 17:52:35,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:35,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:52:35,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:35,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:35,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:35,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:35,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:35,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:35,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 17:52:35,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:35,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:35,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:35,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-07-09 17:52:36,159 INFO 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 17:52:36,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742723671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:36,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:36,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:52:36,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127429402] [2021-07-09 17:52:36,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:52:36,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:36,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:52:36,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:52:36,161 INFO L87 Difference]: Start difference. First operand 4237 states and 18904 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:37,871 INFO L93 Difference]: Finished difference Result 5671 states and 24419 transitions. [2021-07-09 17:52:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:52:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:37,886 INFO L225 Difference]: With dead ends: 5671 [2021-07-09 17:52:37,886 INFO L226 Difference]: Without dead ends: 5525 [2021-07-09 17:52:37,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1232.1ms TimeCoverageRelationStatistics Valid=321, Invalid=2031, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:52:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-07-09 17:52:37,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 4234. [2021-07-09 17:52:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 4.462556106780061) internal successors, (18890), 4233 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 18890 transitions. [2021-07-09 17:52:37,971 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 18890 transitions. Word has length 30 [2021-07-09 17:52:37,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:37,971 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 18890 transitions. [2021-07-09 17:52:37,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:37,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 18890 transitions. [2021-07-09 17:52:37,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:37,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:37,979 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:38,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:38,180 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:38,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1472992276, now seen corresponding path program 19 times [2021-07-09 17:52:38,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:38,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843393902] [2021-07-09 17:52:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:38,365 INFO 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 17:52:38,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:38,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843393902] [2021-07-09 17:52:38,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843393902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:38,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674145194] [2021-07-09 17:52:38,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:38,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:38,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:38,507 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 17:52:38,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:38,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:38,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:38,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:52:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:38,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674145194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:38,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:38,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:52:38,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70075542] [2021-07-09 17:52:38,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:52:38,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:38,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:52:38,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:52:38,583 INFO L87 Difference]: Start difference. First operand 4234 states and 18890 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:40,293 INFO L93 Difference]: Finished difference Result 5602 states and 24458 transitions. [2021-07-09 17:52:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:52:40,293 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:40,307 INFO L225 Difference]: With dead ends: 5602 [2021-07-09 17:52:40,307 INFO L226 Difference]: Without dead ends: 5521 [2021-07-09 17:52:40,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1281.2ms TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:52:40,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2021-07-09 17:52:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 4244. [2021-07-09 17:52:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4244 states, 4243 states have (on average 4.460994579307094) internal successors, (18928), 4243 states have internal predecessors, (18928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4244 states to 4244 states and 18928 transitions. [2021-07-09 17:52:40,390 INFO L78 Accepts]: Start accepts. Automaton has 4244 states and 18928 transitions. Word has length 30 [2021-07-09 17:52:40,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:40,390 INFO L482 AbstractCegarLoop]: Abstraction has 4244 states and 18928 transitions. [2021-07-09 17:52:40,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4244 states and 18928 transitions. [2021-07-09 17:52:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:40,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:40,398 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:40,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-09 17:52:40,599 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:40,599 INFO L82 PathProgramCache]: Analyzing trace with hash 271371730, now seen corresponding path program 20 times [2021-07-09 17:52:40,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:40,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108784684] [2021-07-09 17:52:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:40,770 INFO 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 17:52:40,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:40,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108784684] [2021-07-09 17:52:40,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108784684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:40,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883674322] [2021-07-09 17:52:40,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:40,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:40,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:40,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:52:40,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:40,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:40,963 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 17:52:40,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:40,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:40,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:40,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:52:41,141 INFO 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 17:52:41,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883674322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:41,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:41,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:52:41,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323738679] [2021-07-09 17:52:41,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:41,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:41,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:41,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:41,142 INFO L87 Difference]: Start difference. First operand 4244 states and 18928 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:42,881 INFO L93 Difference]: Finished difference Result 5552 states and 24126 transitions. [2021-07-09 17:52:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:52:42,881 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:42,895 INFO L225 Difference]: With dead ends: 5552 [2021-07-09 17:52:42,895 INFO L226 Difference]: Without dead ends: 5471 [2021-07-09 17:52:42,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1220.2ms TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:52:42,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-07-09 17:52:42,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 4231. [2021-07-09 17:52:42,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 4.4635933806146575) internal successors, (18881), 4230 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 18881 transitions. [2021-07-09 17:52:42,977 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 18881 transitions. Word has length 30 [2021-07-09 17:52:42,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:42,977 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 18881 transitions. [2021-07-09 17:52:42,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 18881 transitions. [2021-07-09 17:52:42,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:42,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:42,985 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:43,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-07-09 17:52:43,185 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:43,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:43,186 INFO L82 PathProgramCache]: Analyzing trace with hash 594062564, now seen corresponding path program 23 times [2021-07-09 17:52:43,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:43,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695167021] [2021-07-09 17:52:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:43,433 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 17:52:43,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:43,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695167021] [2021-07-09 17:52:43,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695167021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:43,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320549837] [2021-07-09 17:52:43,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:52:43,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:52:43,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:43,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:43,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:43,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:43,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:43,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:43,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-07-09 17:52:43,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:43,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:43,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:43,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:241 [2021-07-09 17:52:43,992 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-07-09 17:52:44,137 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 17:52:44,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320549837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:44,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:44,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:52:44,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048683560] [2021-07-09 17:52:44,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:52:44,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:44,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:52:44,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:52:44,138 INFO L87 Difference]: Start difference. First operand 4231 states and 18881 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:44,900 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-09 17:52:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:45,989 INFO L93 Difference]: Finished difference Result 5055 states and 22181 transitions. [2021-07-09 17:52:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:52:45,990 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:46,002 INFO L225 Difference]: With dead ends: 5055 [2021-07-09 17:52:46,002 INFO L226 Difference]: Without dead ends: 5006 [2021-07-09 17:52:46,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1723.9ms TimeCoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:52:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-07-09 17:52:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4233. [2021-07-09 17:52:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4232 states have (on average 4.4629017013232515) internal successors, (18887), 4232 states have internal predecessors, (18887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 18887 transitions. [2021-07-09 17:52:46,109 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 18887 transitions. Word has length 30 [2021-07-09 17:52:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:46,109 INFO L482 AbstractCegarLoop]: Abstraction has 4233 states and 18887 transitions. [2021-07-09 17:52:46,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 18887 transitions. [2021-07-09 17:52:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:46,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:46,116 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:46,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-09 17:52:46,321 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:46,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1739649234, now seen corresponding path program 24 times [2021-07-09 17:52:46,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:46,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123013753] [2021-07-09 17:52:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:46,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:46,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123013753] [2021-07-09 17:52:46,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123013753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:46,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618562799] [2021-07-09 17:52:46,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:46,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:52:46,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:46,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:52:46,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:46,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:46,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:46,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 17:52:46,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:46,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:46,844 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 17:52:46,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-07-09 17:52:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:47,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618562799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:47,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:47,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 17:52:47,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484481845] [2021-07-09 17:52:47,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:47,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:47,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:47,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:47,119 INFO L87 Difference]: Start difference. First operand 4233 states and 18887 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:49,941 INFO L93 Difference]: Finished difference Result 4928 states and 21374 transitions. [2021-07-09 17:52:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:52:49,941 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:49,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:49,953 INFO L225 Difference]: With dead ends: 4928 [2021-07-09 17:52:49,953 INFO L226 Difference]: Without dead ends: 4797 [2021-07-09 17:52:49,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2014.4ms TimeCoverageRelationStatistics Valid=335, Invalid=2115, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:52:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-07-09 17:52:50,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 4246. [2021-07-09 17:52:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4246 states, 4245 states have (on average 4.4621908127208485) internal successors, (18942), 4245 states have internal predecessors, (18942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4246 states to 4246 states and 18942 transitions. [2021-07-09 17:52:50,027 INFO L78 Accepts]: Start accepts. Automaton has 4246 states and 18942 transitions. Word has length 30 [2021-07-09 17:52:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:50,028 INFO L482 AbstractCegarLoop]: Abstraction has 4246 states and 18942 transitions. [2021-07-09 17:52:50,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 4246 states and 18942 transitions. [2021-07-09 17:52:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:50,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:50,036 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] [2021-07-09 17:52:50,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:50,241 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:50,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash -801524512, now seen corresponding path program 25 times [2021-07-09 17:52:50,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:50,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489020801] [2021-07-09 17:52:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:50,529 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 17:52:50,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:50,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489020801] [2021-07-09 17:52:50,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489020801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:50,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070741062] [2021-07-09 17:52:50,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:50,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:50,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:50,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:50,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:50,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:50,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:52:50,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:50,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:50,798 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 17:52:50,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 17:52:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:50,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070741062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:50,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:50,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:52:50,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354693580] [2021-07-09 17:52:50,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:52:50,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:50,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:52:50,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:52:50,867 INFO L87 Difference]: Start difference. First operand 4246 states and 18942 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:51,367 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-07-09 17:52:51,720 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-07-09 17:52:51,845 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-07-09 17:52:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:52,612 INFO L93 Difference]: Finished difference Result 5065 states and 22182 transitions. [2021-07-09 17:52:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:52:52,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:52,625 INFO L225 Difference]: With dead ends: 5065 [2021-07-09 17:52:52,625 INFO L226 Difference]: Without dead ends: 4982 [2021-07-09 17:52:52,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1472.5ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:52:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2021-07-09 17:52:52,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 4237. [2021-07-09 17:52:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4236 states have (on average 4.462936732766761) internal successors, (18905), 4236 states have internal predecessors, (18905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 18905 transitions. [2021-07-09 17:52:52,747 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 18905 transitions. Word has length 30 [2021-07-09 17:52:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:52,747 INFO L482 AbstractCegarLoop]: Abstraction has 4237 states and 18905 transitions. [2021-07-09 17:52:52,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 18905 transitions. [2021-07-09 17:52:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:52,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:52,756 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:52,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-09 17:52:52,957 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:52,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:52,957 INFO L82 PathProgramCache]: Analyzing trace with hash 492452108, now seen corresponding path program 26 times [2021-07-09 17:52:52,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:52,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266689694] [2021-07-09 17:52:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:53,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:53,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266689694] [2021-07-09 17:52:53,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266689694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:53,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191626801] [2021-07-09 17:52:53,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:53,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:53,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:53,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:52:53,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:53,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:53,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:53,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-07-09 17:52:53,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:53,531 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-07-09 17:52:53,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:52:53,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:111 [2021-07-09 17:52:53,727 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 17:52:53,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191626801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:53,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:53,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 17:52:53,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566103] [2021-07-09 17:52:53,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:52:53,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:53,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:52:53,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:52:53,729 INFO L87 Difference]: Start difference. First operand 4237 states and 18905 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:55,556 INFO L93 Difference]: Finished difference Result 5335 states and 23067 transitions. [2021-07-09 17:52:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:52:55,557 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:55,569 INFO L225 Difference]: With dead ends: 5335 [2021-07-09 17:52:55,569 INFO L226 Difference]: Without dead ends: 5117 [2021-07-09 17:52:55,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1403.7ms TimeCoverageRelationStatistics Valid=268, Invalid=1624, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:52:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-07-09 17:52:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4259. [2021-07-09 17:52:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 4258 states have (on average 4.4678252700798495) internal successors, (19024), 4258 states have internal predecessors, (19024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 19024 transitions. [2021-07-09 17:52:55,651 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 19024 transitions. Word has length 30 [2021-07-09 17:52:55,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:55,651 INFO L482 AbstractCegarLoop]: Abstraction has 4259 states and 19024 transitions. [2021-07-09 17:52:55,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:55,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 19024 transitions. [2021-07-09 17:52:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:55,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:55,659 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:55,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:55,860 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:55,860 INFO L82 PathProgramCache]: Analyzing trace with hash -172480814, now seen corresponding path program 21 times [2021-07-09 17:52:55,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:55,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137706609] [2021-07-09 17:52:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:56,063 INFO 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 17:52:56,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:56,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137706609] [2021-07-09 17:52:56,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137706609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:56,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615227580] [2021-07-09 17:52:56,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:56,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:52:56,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:52:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:56,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:56,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:56,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:56,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2021-07-09 17:52:56,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:52:56,465 INFO L628 ElimStorePlain]: treesize reduction 33, result has 54.2 percent of original size [2021-07-09 17:52:56,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:56,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:41 [2021-07-09 17:52:56,572 INFO 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 17:52:56,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615227580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:56,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:56,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:52:56,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853323696] [2021-07-09 17:52:56,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:52:56,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:56,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:52:56,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:52:56,573 INFO L87 Difference]: Start difference. First operand 4259 states and 19024 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:58,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:58,438 INFO L93 Difference]: Finished difference Result 5095 states and 22084 transitions. [2021-07-09 17:52:58,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:52:58,438 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:52:58,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:58,450 INFO L225 Difference]: With dead ends: 5095 [2021-07-09 17:52:58,451 INFO L226 Difference]: Without dead ends: 4933 [2021-07-09 17:52:58,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1339.3ms TimeCoverageRelationStatistics Valid=283, Invalid=1973, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:52:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2021-07-09 17:52:58,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4259. [2021-07-09 17:52:58,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 4258 states have (on average 4.4678252700798495) internal successors, (19024), 4258 states have internal predecessors, (19024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 19024 transitions. [2021-07-09 17:52:58,529 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 19024 transitions. Word has length 30 [2021-07-09 17:52:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:58,529 INFO L482 AbstractCegarLoop]: Abstraction has 4259 states and 19024 transitions. [2021-07-09 17:52:58,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 19024 transitions. [2021-07-09 17:52:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:52:58,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:58,537 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:58,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-07-09 17:52:58,738 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:58,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:58,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1897976964, now seen corresponding path program 22 times [2021-07-09 17:52:58,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:58,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487260921] [2021-07-09 17:52:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:58,984 INFO 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 17:52:58,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:58,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487260921] [2021-07-09 17:52:58,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487260921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:58,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660033105] [2021-07-09 17:52:58,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:59,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:59,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:59,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:59,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:59,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:52:59,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:59,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:59,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:52:59,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:59,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:59,209 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 17:52:59,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 17:52:59,261 INFO 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 17:52:59,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660033105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:59,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:59,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-09 17:52:59,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607591218] [2021-07-09 17:52:59,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:52:59,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:59,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:52:59,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:52:59,262 INFO L87 Difference]: Start difference. First operand 4259 states and 19024 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:00,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:00,463 INFO L93 Difference]: Finished difference Result 4880 states and 21466 transitions. [2021-07-09 17:53:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:53:00,463 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:00,475 INFO L225 Difference]: With dead ends: 4880 [2021-07-09 17:53:00,475 INFO L226 Difference]: Without dead ends: 4807 [2021-07-09 17:53:00,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 876.5ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:53:00,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-07-09 17:53:00,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 4264. [2021-07-09 17:53:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 4263 states have (on average 4.4677457189772465) internal successors, (19046), 4263 states have internal predecessors, (19046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 19046 transitions. [2021-07-09 17:53:00,555 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 19046 transitions. Word has length 30 [2021-07-09 17:53:00,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:00,555 INFO L482 AbstractCegarLoop]: Abstraction has 4264 states and 19046 transitions. [2021-07-09 17:53:00,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:00,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 19046 transitions. [2021-07-09 17:53:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:00,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:00,563 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:00,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:00,763 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:00,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1365219982, now seen corresponding path program 23 times [2021-07-09 17:53:00,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:00,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118719608] [2021-07-09 17:53:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:00,988 INFO 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 17:53:00,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:00,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118719608] [2021-07-09 17:53:00,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118719608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:00,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077581309] [2021-07-09 17:53:00,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:01,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:53:01,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:01,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:01,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:01,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:01,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:01,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:01,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-07-09 17:53:01,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:01,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:01,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:01,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:239 [2021-07-09 17:53:01,551 INFO 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 17:53:01,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077581309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:01,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:01,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:53:01,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187982151] [2021-07-09 17:53:01,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:01,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:01,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:01,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:01,552 INFO L87 Difference]: Start difference. First operand 4264 states and 19046 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:02,813 INFO L93 Difference]: Finished difference Result 5027 states and 22179 transitions. [2021-07-09 17:53:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:53:02,813 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:02,826 INFO L225 Difference]: With dead ends: 5027 [2021-07-09 17:53:02,826 INFO L226 Difference]: Without dead ends: 4990 [2021-07-09 17:53:02,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1085.5ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:53:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4990 states. [2021-07-09 17:53:02,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4990 to 4267. [2021-07-09 17:53:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4267 states, 4266 states have (on average 4.46671354899203) internal successors, (19055), 4266 states have internal predecessors, (19055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:02,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 19055 transitions. [2021-07-09 17:53:02,903 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 19055 transitions. Word has length 30 [2021-07-09 17:53:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:02,903 INFO L482 AbstractCegarLoop]: Abstraction has 4267 states and 19055 transitions. [2021-07-09 17:53:02,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 19055 transitions. [2021-07-09 17:53:02,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:02,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:02,911 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:03,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:03,111 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:03,112 INFO L82 PathProgramCache]: Analyzing trace with hash -2048213402, now seen corresponding path program 24 times [2021-07-09 17:53:03,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:03,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944475105] [2021-07-09 17:53:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:03,385 INFO 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 17:53:03,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:03,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944475105] [2021-07-09 17:53:03,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944475105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:03,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283781493] [2021-07-09 17:53:03,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:03,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:53:03,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:03,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:03,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:03,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:03,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:03,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:03,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 17:53:03,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:03,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:03,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:03,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-07-09 17:53:03,841 INFO 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 17:53:03,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283781493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:03,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:03,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:53:03,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028189013] [2021-07-09 17:53:03,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:53:03,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:03,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:53:03,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:53:03,842 INFO L87 Difference]: Start difference. First operand 4267 states and 19055 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:06,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:06,035 INFO L93 Difference]: Finished difference Result 5190 states and 22713 transitions. [2021-07-09 17:53:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:53:06,035 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:06,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:06,049 INFO L225 Difference]: With dead ends: 5190 [2021-07-09 17:53:06,049 INFO L226 Difference]: Without dead ends: 5093 [2021-07-09 17:53:06,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1614.3ms TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:53:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5093 states. [2021-07-09 17:53:06,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5093 to 4284. [2021-07-09 17:53:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4284 states, 4283 states have (on average 4.46439411627364) internal successors, (19121), 4283 states have internal predecessors, (19121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 19121 transitions. [2021-07-09 17:53:06,123 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 19121 transitions. Word has length 30 [2021-07-09 17:53:06,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:06,124 INFO L482 AbstractCegarLoop]: Abstraction has 4284 states and 19121 transitions. [2021-07-09 17:53:06,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:06,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 19121 transitions. [2021-07-09 17:53:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:06,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:06,132 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:06,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2021-07-09 17:53:06,332 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:06,333 INFO L82 PathProgramCache]: Analyzing trace with hash 87177790, now seen corresponding path program 27 times [2021-07-09 17:53:06,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:06,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251319216] [2021-07-09 17:53:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:06,592 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 17:53:06,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:06,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251319216] [2021-07-09 17:53:06,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251319216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:06,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752622236] [2021-07-09 17:53:06,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:06,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:53:06,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:06,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:53:06,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:06,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:06,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:06,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-07-09 17:53:06,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:06,907 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-07-09 17:53:06,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:53:06,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:111 [2021-07-09 17:53:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:07,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752622236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:07,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:07,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 17:53:07,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687124293] [2021-07-09 17:53:07,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:53:07,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:07,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:53:07,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:53:07,115 INFO L87 Difference]: Start difference. First operand 4284 states and 19121 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:09,178 INFO L93 Difference]: Finished difference Result 5631 states and 24074 transitions. [2021-07-09 17:53:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:53:09,178 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:09,192 INFO L225 Difference]: With dead ends: 5631 [2021-07-09 17:53:09,192 INFO L226 Difference]: Without dead ends: 5413 [2021-07-09 17:53:09,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1661.2ms TimeCoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:53:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-07-09 17:53:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 4304. [2021-07-09 17:53:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 4303 states have (on average 4.466186381594237) internal successors, (19218), 4303 states have internal predecessors, (19218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 19218 transitions. [2021-07-09 17:53:09,279 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 19218 transitions. Word has length 30 [2021-07-09 17:53:09,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:09,279 INFO L482 AbstractCegarLoop]: Abstraction has 4304 states and 19218 transitions. [2021-07-09 17:53:09,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:09,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 19218 transitions. [2021-07-09 17:53:09,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:09,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:09,288 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:09,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:09,488 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:09,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:09,489 INFO L82 PathProgramCache]: Analyzing trace with hash -577755132, now seen corresponding path program 25 times [2021-07-09 17:53:09,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:09,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869084089] [2021-07-09 17:53:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:09,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:09,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869084089] [2021-07-09 17:53:09,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869084089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:09,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087344248] [2021-07-09 17:53:09,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:09,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:09,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:09,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:09,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:09,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:09,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 17:53:09,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:09,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:09,971 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 17:53:09,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-09 17:53:10,015 INFO 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 17:53:10,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087344248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:10,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:10,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:53:10,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944447788] [2021-07-09 17:53:10,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:53:10,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:10,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:53:10,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:53:10,016 INFO L87 Difference]: Start difference. First operand 4304 states and 19218 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:11,305 INFO L93 Difference]: Finished difference Result 5375 states and 23515 transitions. [2021-07-09 17:53:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:53:11,305 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:11,319 INFO L225 Difference]: With dead ends: 5375 [2021-07-09 17:53:11,319 INFO L226 Difference]: Without dead ends: 5284 [2021-07-09 17:53:11,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 815.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:53:11,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-07-09 17:53:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4316. [2021-07-09 17:53:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4316 states, 4315 states have (on average 4.464426419466975) internal successors, (19264), 4315 states have internal predecessors, (19264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4316 states to 4316 states and 19264 transitions. [2021-07-09 17:53:11,408 INFO L78 Accepts]: Start accepts. Automaton has 4316 states and 19264 transitions. Word has length 30 [2021-07-09 17:53:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:11,408 INFO L482 AbstractCegarLoop]: Abstraction has 4316 states and 19264 transitions. [2021-07-09 17:53:11,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4316 states and 19264 transitions. [2021-07-09 17:53:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:11,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:11,417 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:11,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-07-09 17:53:11,618 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:11,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:11,618 INFO L82 PathProgramCache]: Analyzing trace with hash -346038464, now seen corresponding path program 26 times [2021-07-09 17:53:11,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:11,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285272441] [2021-07-09 17:53:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:11,811 INFO 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 17:53:11,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:11,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285272441] [2021-07-09 17:53:11,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285272441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:11,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085166810] [2021-07-09 17:53:11,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:11,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:11,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:11,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:53:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:12,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:12,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:12,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:12,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:12,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-07-09 17:53:12,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:12,124 INFO L628 ElimStorePlain]: treesize reduction 29, result has 52.5 percent of original size [2021-07-09 17:53:12,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:12,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-07-09 17:53:12,230 INFO 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 17:53:12,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085166810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:12,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:12,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:53:12,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849912817] [2021-07-09 17:53:12,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:53:12,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:12,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:53:12,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:53:12,231 INFO L87 Difference]: Start difference. First operand 4316 states and 19264 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:13,785 INFO L93 Difference]: Finished difference Result 5842 states and 25410 transitions. [2021-07-09 17:53:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:53:13,786 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:13,800 INFO L225 Difference]: With dead ends: 5842 [2021-07-09 17:53:13,800 INFO L226 Difference]: Without dead ends: 5705 [2021-07-09 17:53:13,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1194.1ms TimeCoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:53:13,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5705 states. [2021-07-09 17:53:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5705 to 4349. [2021-07-09 17:53:13,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4349 states, 4348 states have (on average 4.459521619135234) internal successors, (19390), 4348 states have internal predecessors, (19390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 19390 transitions. [2021-07-09 17:53:13,891 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 19390 transitions. Word has length 30 [2021-07-09 17:53:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:13,891 INFO L482 AbstractCegarLoop]: Abstraction has 4349 states and 19390 transitions. [2021-07-09 17:53:13,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 19390 transitions. [2021-07-09 17:53:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:13,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:13,900 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:14,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-07-09 17:53:14,100 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:14,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash -852384730, now seen corresponding path program 27 times [2021-07-09 17:53:14,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:14,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893956646] [2021-07-09 17:53:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:14,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:14,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893956646] [2021-07-09 17:53:14,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893956646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:14,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087564905] [2021-07-09 17:53:14,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:14,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:53:14,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:14,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:53:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:14,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:14,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:14,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:14,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:14,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2021-07-09 17:53:14,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:14,724 INFO L628 ElimStorePlain]: treesize reduction 37, result has 54.3 percent of original size [2021-07-09 17:53:14,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:14,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:53 [2021-07-09 17:53:14,887 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 17:53:14,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087564905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:14,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:14,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:53:14,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664682676] [2021-07-09 17:53:14,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:53:14,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:14,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:53:14,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:53:14,888 INFO L87 Difference]: Start difference. First operand 4349 states and 19390 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:16,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:16,905 INFO L93 Difference]: Finished difference Result 5104 states and 22142 transitions. [2021-07-09 17:53:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:53:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:16,918 INFO L225 Difference]: With dead ends: 5104 [2021-07-09 17:53:16,918 INFO L226 Difference]: Without dead ends: 4942 [2021-07-09 17:53:16,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1407.4ms TimeCoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:53:16,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-07-09 17:53:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 4339. [2021-07-09 17:53:16,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4339 states, 4338 states have (on average 4.461041954817889) internal successors, (19352), 4338 states have internal predecessors, (19352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 19352 transitions. [2021-07-09 17:53:16,997 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 19352 transitions. Word has length 30 [2021-07-09 17:53:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:16,997 INFO L482 AbstractCegarLoop]: Abstraction has 4339 states and 19352 transitions. [2021-07-09 17:53:16,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:16,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 19352 transitions. [2021-07-09 17:53:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:17,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:17,006 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:17,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:17,207 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:17,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:17,207 INFO L82 PathProgramCache]: Analyzing trace with hash 496859426, now seen corresponding path program 28 times [2021-07-09 17:53:17,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:17,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061353421] [2021-07-09 17:53:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:17,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:17,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061353421] [2021-07-09 17:53:17,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061353421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:17,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696453280] [2021-07-09 17:53:17,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:17,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:17,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:17,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:17,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:17,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:17,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:17,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:53:17,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:17,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:17,645 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 17:53:17,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 17:53:17,718 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 17:53:17,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696453280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:17,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:17,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-09 17:53:17,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210117228] [2021-07-09 17:53:17,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:53:17,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:17,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:53:17,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:53:17,719 INFO L87 Difference]: Start difference. First operand 4339 states and 19352 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:18,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:18,893 INFO L93 Difference]: Finished difference Result 4835 states and 21285 transitions. [2021-07-09 17:53:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:53:18,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:18,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:18,905 INFO L225 Difference]: With dead ends: 4835 [2021-07-09 17:53:18,905 INFO L226 Difference]: Without dead ends: 4762 [2021-07-09 17:53:18,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 887.1ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:53:18,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4762 states. [2021-07-09 17:53:18,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4762 to 4351. [2021-07-09 17:53:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4351 states, 4350 states have (on average 4.46) internal successors, (19401), 4350 states have internal predecessors, (19401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4351 states to 4351 states and 19401 transitions. [2021-07-09 17:53:19,011 INFO L78 Accepts]: Start accepts. Automaton has 4351 states and 19401 transitions. Word has length 30 [2021-07-09 17:53:19,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:19,012 INFO L482 AbstractCegarLoop]: Abstraction has 4351 states and 19401 transitions. [2021-07-09 17:53:19,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:19,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4351 states and 19401 transitions. [2021-07-09 17:53:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:19,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:19,020 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:19,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-07-09 17:53:19,221 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:19,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:19,221 INFO L82 PathProgramCache]: Analyzing trace with hash -898727650, now seen corresponding path program 29 times [2021-07-09 17:53:19,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:19,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869803178] [2021-07-09 17:53:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:19,456 INFO 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 17:53:19,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:19,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869803178] [2021-07-09 17:53:19,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869803178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:19,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128755267] [2021-07-09 17:53:19,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:19,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:53:19,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:19,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:19,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:19,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:19,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:19,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-09 17:53:19,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:19,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:19,708 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 17:53:19,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:220 [2021-07-09 17:53:19,891 INFO 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 17:53:19,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128755267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:19,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:19,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:53:19,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927896526] [2021-07-09 17:53:19,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:53:19,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:53:19,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:53:19,892 INFO L87 Difference]: Start difference. First operand 4351 states and 19401 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:21,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:21,375 INFO L93 Difference]: Finished difference Result 5039 states and 22207 transitions. [2021-07-09 17:53:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:53:21,375 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:21,388 INFO L225 Difference]: With dead ends: 5039 [2021-07-09 17:53:21,388 INFO L226 Difference]: Without dead ends: 4976 [2021-07-09 17:53:21,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1199.5ms TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:53:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-07-09 17:53:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4352. [2021-07-09 17:53:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 4.459664444955183) internal successors, (19404), 4351 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 19404 transitions. [2021-07-09 17:53:21,465 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 19404 transitions. Word has length 30 [2021-07-09 17:53:21,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:21,465 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 19404 transitions. [2021-07-09 17:53:21,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:21,465 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 19404 transitions. [2021-07-09 17:53:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:21,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:21,474 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:21,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-07-09 17:53:21,674 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:21,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1262431236, now seen corresponding path program 30 times [2021-07-09 17:53:21,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:21,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281294114] [2021-07-09 17:53:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:21,936 INFO 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 17:53:21,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:21,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281294114] [2021-07-09 17:53:21,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281294114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:21,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859555989] [2021-07-09 17:53:21,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:21,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:53:21,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:21,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:53:21,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:22,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:22,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:22,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 17:53:22,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:22,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:22,174 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 17:53:22,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-07-09 17:53:22,399 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 17:53:22,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859555989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:22,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:22,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 17:53:22,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602567313] [2021-07-09 17:53:22,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:22,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:22,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:22,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:22,400 INFO L87 Difference]: Start difference. First operand 4352 states and 19404 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:24,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:24,410 INFO L93 Difference]: Finished difference Result 4881 states and 21439 transitions. [2021-07-09 17:53:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:53:24,410 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:24,423 INFO L225 Difference]: With dead ends: 4881 [2021-07-09 17:53:24,423 INFO L226 Difference]: Without dead ends: 4791 [2021-07-09 17:53:24,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1473.4ms TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:53:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-07-09 17:53:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 4357. [2021-07-09 17:53:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4357 states, 4356 states have (on average 4.459595959595959) internal successors, (19426), 4356 states have internal predecessors, (19426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4357 states to 4357 states and 19426 transitions. [2021-07-09 17:53:24,503 INFO L78 Accepts]: Start accepts. Automaton has 4357 states and 19426 transitions. Word has length 30 [2021-07-09 17:53:24,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:24,503 INFO L482 AbstractCegarLoop]: Abstraction has 4357 states and 19426 transitions. [2021-07-09 17:53:24,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:24,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4357 states and 19426 transitions. [2021-07-09 17:53:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:24,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:24,512 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:24,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-07-09 17:53:24,712 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:24,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1795188218, now seen corresponding path program 31 times [2021-07-09 17:53:24,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:24,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421259939] [2021-07-09 17:53:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:24,985 INFO 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 17:53:24,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:24,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421259939] [2021-07-09 17:53:24,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421259939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:24,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479365284] [2021-07-09 17:53:24,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:25,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:25,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:25,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:25,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:25,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:25,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:53:25,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:25,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:25,190 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 17:53:25,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 17:53:25,245 INFO 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 17:53:25,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479365284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:25,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:25,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-07-09 17:53:25,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389976583] [2021-07-09 17:53:25,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:53:25,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:25,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:53:25,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:53:25,246 INFO L87 Difference]: Start difference. First operand 4357 states and 19426 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:26,073 INFO L93 Difference]: Finished difference Result 4973 states and 21853 transitions. [2021-07-09 17:53:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:53:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:26,086 INFO L225 Difference]: With dead ends: 4973 [2021-07-09 17:53:26,086 INFO L226 Difference]: Without dead ends: 4899 [2021-07-09 17:53:26,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 601.8ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:53:26,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-07-09 17:53:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4352. [2021-07-09 17:53:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 4.459664444955183) internal successors, (19404), 4351 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 19404 transitions. [2021-07-09 17:53:26,171 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 19404 transitions. Word has length 30 [2021-07-09 17:53:26,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:26,171 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 19404 transitions. [2021-07-09 17:53:26,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 19404 transitions. [2021-07-09 17:53:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:26,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:26,180 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:26,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-07-09 17:53:26,380 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash 654044294, now seen corresponding path program 32 times [2021-07-09 17:53:26,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:26,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728053528] [2021-07-09 17:53:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:26,609 INFO 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 17:53:26,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:26,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728053528] [2021-07-09 17:53:26,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728053528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:26,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570767157] [2021-07-09 17:53:26,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:26,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:26,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:26,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:53:26,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:26,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:26,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:26,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 17:53:26,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:26,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:26,835 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 17:53:26,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-07-09 17:53:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:27,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570767157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:27,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:27,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 17:53:27,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94825442] [2021-07-09 17:53:27,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:27,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:27,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:27,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:27,097 INFO L87 Difference]: Start difference. First operand 4352 states and 19404 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:29,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:29,200 INFO L93 Difference]: Finished difference Result 4883 states and 21378 transitions. [2021-07-09 17:53:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:53:29,200 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:29,213 INFO L225 Difference]: With dead ends: 4883 [2021-07-09 17:53:29,213 INFO L226 Difference]: Without dead ends: 4786 [2021-07-09 17:53:29,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1637.1ms TimeCoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:53:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-07-09 17:53:29,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4354. [2021-07-09 17:53:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 4353 states have (on average 4.4601424305076955) internal successors, (19415), 4353 states have internal predecessors, (19415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 19415 transitions. [2021-07-09 17:53:29,294 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 19415 transitions. Word has length 30 [2021-07-09 17:53:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:29,294 INFO L482 AbstractCegarLoop]: Abstraction has 4354 states and 19415 transitions. [2021-07-09 17:53:29,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:29,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 19415 transitions. [2021-07-09 17:53:29,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:29,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:29,302 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:29,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-09 17:53:29,503 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:29,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:29,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1896558996, now seen corresponding path program 33 times [2021-07-09 17:53:29,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:29,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535115187] [2021-07-09 17:53:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:29,803 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 17:53:29,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:29,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535115187] [2021-07-09 17:53:29,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535115187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:29,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455517669] [2021-07-09 17:53:29,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:29,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:53:29,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:29,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:53:29,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:30,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:30,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:30,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 17:53:30,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:30,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:30,040 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 17:53:30,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-07-09 17:53:30,317 INFO 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 17:53:30,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455517669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:30,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:30,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 17:53:30,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126007698] [2021-07-09 17:53:30,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:30,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:30,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:30,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:30,318 INFO L87 Difference]: Start difference. First operand 4354 states and 19415 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:32,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:32,473 INFO L93 Difference]: Finished difference Result 4807 states and 21085 transitions. [2021-07-09 17:53:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:53:32,474 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:32,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:32,485 INFO L225 Difference]: With dead ends: 4807 [2021-07-09 17:53:32,485 INFO L226 Difference]: Without dead ends: 4726 [2021-07-09 17:53:32,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1731.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:53:32,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2021-07-09 17:53:32,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 4350. [2021-07-09 17:53:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4349 states have (on average 4.460335709358473) internal successors, (19398), 4349 states have internal predecessors, (19398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 19398 transitions. [2021-07-09 17:53:32,565 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 19398 transitions. Word has length 30 [2021-07-09 17:53:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:32,565 INFO L482 AbstractCegarLoop]: Abstraction has 4350 states and 19398 transitions. [2021-07-09 17:53:32,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 19398 transitions. [2021-07-09 17:53:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:32,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:32,573 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:32,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-07-09 17:53:32,774 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:32,774 INFO L82 PathProgramCache]: Analyzing trace with hash 254880366, now seen corresponding path program 34 times [2021-07-09 17:53:32,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:32,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778082736] [2021-07-09 17:53:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:33,003 INFO 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 17:53:33,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:33,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778082736] [2021-07-09 17:53:33,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778082736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:33,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236106850] [2021-07-09 17:53:33,004 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 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 17:53:33,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:33,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:33,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:33,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:33,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:33,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:33,235 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:53:33,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:33,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:33,243 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 17:53:33,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 17:53:33,274 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 17:53:33,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236106850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:33,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:33,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-07-09 17:53:33,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477061131] [2021-07-09 17:53:33,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:53:33,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:33,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:53:33,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:53:33,275 INFO L87 Difference]: Start difference. First operand 4350 states and 19398 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:34,433 INFO L93 Difference]: Finished difference Result 5100 states and 22309 transitions. [2021-07-09 17:53:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:53:34,433 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:34,445 INFO L225 Difference]: With dead ends: 5100 [2021-07-09 17:53:34,446 INFO L226 Difference]: Without dead ends: 5043 [2021-07-09 17:53:34,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 753.2ms TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:53:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2021-07-09 17:53:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 4351. [2021-07-09 17:53:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4351 states, 4350 states have (on average 4.465287356321839) internal successors, (19424), 4350 states have internal predecessors, (19424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4351 states to 4351 states and 19424 transitions. [2021-07-09 17:53:34,538 INFO L78 Accepts]: Start accepts. Automaton has 4351 states and 19424 transitions. Word has length 30 [2021-07-09 17:53:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:34,538 INFO L482 AbstractCegarLoop]: Abstraction has 4351 states and 19424 transitions. [2021-07-09 17:53:34,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4351 states and 19424 transitions. [2021-07-09 17:53:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:34,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:34,547 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:34,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:34,748 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:34,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:34,748 INFO L82 PathProgramCache]: Analyzing trace with hash 969357380, now seen corresponding path program 35 times [2021-07-09 17:53:34,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:34,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355989644] [2021-07-09 17:53:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:34,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:34,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355989644] [2021-07-09 17:53:34,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355989644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:34,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101852421] [2021-07-09 17:53:34,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:35,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:53:35,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:35,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:35,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:35,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:35,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:35,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-09 17:53:35,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:35,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:35,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:35,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:220 [2021-07-09 17:53:35,405 INFO 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 17:53:35,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101852421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:35,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:35,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:53:35,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595616029] [2021-07-09 17:53:35,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:53:35,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:35,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:53:35,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:53:35,406 INFO L87 Difference]: Start difference. First operand 4351 states and 19424 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:36,378 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-07-09 17:53:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:37,302 INFO L93 Difference]: Finished difference Result 5082 states and 22380 transitions. [2021-07-09 17:53:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:53:37,302 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:37,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:37,315 INFO L225 Difference]: With dead ends: 5082 [2021-07-09 17:53:37,315 INFO L226 Difference]: Without dead ends: 5019 [2021-07-09 17:53:37,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1359.3ms TimeCoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:53:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5019 states. [2021-07-09 17:53:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5019 to 4350. [2021-07-09 17:53:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4349 states have (on average 4.46562428144401) internal successors, (19421), 4349 states have internal predecessors, (19421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 19421 transitions. [2021-07-09 17:53:37,396 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 19421 transitions. Word has length 30 [2021-07-09 17:53:37,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:37,396 INFO L482 AbstractCegarLoop]: Abstraction has 4350 states and 19421 transitions. [2021-07-09 17:53:37,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:37,396 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 19421 transitions. [2021-07-09 17:53:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:37,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:37,405 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:37,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:37,606 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:37,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:37,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2111173892, now seen corresponding path program 36 times [2021-07-09 17:53:37,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:37,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934491067] [2021-07-09 17:53:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:37,823 INFO 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 17:53:37,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:37,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934491067] [2021-07-09 17:53:37,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934491067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:37,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85218873] [2021-07-09 17:53:37,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:37,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:53:37,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:37,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:37,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:37,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:37,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:37,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:37,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 17:53:37,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:38,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:38,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:38,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-07-09 17:53:38,197 INFO 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 17:53:38,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85218873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:38,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:38,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:53:38,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958086037] [2021-07-09 17:53:38,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:53:38,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:38,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:53:38,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:53:38,198 INFO L87 Difference]: Start difference. First operand 4350 states and 19421 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:39,881 INFO L93 Difference]: Finished difference Result 5611 states and 24398 transitions. [2021-07-09 17:53:39,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:53:39,881 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:39,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:39,895 INFO L225 Difference]: With dead ends: 5611 [2021-07-09 17:53:39,895 INFO L226 Difference]: Without dead ends: 5512 [2021-07-09 17:53:39,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1137.5ms TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:53:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5512 states. [2021-07-09 17:53:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5512 to 4338. [2021-07-09 17:53:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 4.466682038275305) internal successors, (19372), 4337 states have internal predecessors, (19372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 19372 transitions. [2021-07-09 17:53:39,982 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 19372 transitions. Word has length 30 [2021-07-09 17:53:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:39,982 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 19372 transitions. [2021-07-09 17:53:39,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 19372 transitions. [2021-07-09 17:53:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:39,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:39,991 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:40,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-07-09 17:53:40,192 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:40,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1847516932, now seen corresponding path program 1 times [2021-07-09 17:53:40,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:40,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448230668] [2021-07-09 17:53:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:40,346 INFO 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 17:53:40,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:40,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448230668] [2021-07-09 17:53:40,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448230668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:40,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638009008] [2021-07-09 17:53:40,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:40,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:40,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:40,540 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 17:53:40,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:40,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:40,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:40,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:53:40,593 INFO 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 17:53:40,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638009008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:40,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:40,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:53:40,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293777546] [2021-07-09 17:53:40,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:53:40,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:40,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:53:40,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:53:40,594 INFO L87 Difference]: Start difference. First operand 4338 states and 19372 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:42,052 INFO L93 Difference]: Finished difference Result 5698 states and 24891 transitions. [2021-07-09 17:53:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:53:42,053 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:42,068 INFO L225 Difference]: With dead ends: 5698 [2021-07-09 17:53:42,069 INFO L226 Difference]: Without dead ends: 5616 [2021-07-09 17:53:42,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 971.4ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:53:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5616 states. [2021-07-09 17:53:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5616 to 4370. [2021-07-09 17:53:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4370 states, 4369 states have (on average 4.465552758068208) internal successors, (19510), 4369 states have internal predecessors, (19510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:42,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 19510 transitions. [2021-07-09 17:53:42,164 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 19510 transitions. Word has length 30 [2021-07-09 17:53:42,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:42,164 INFO L482 AbstractCegarLoop]: Abstraction has 4370 states and 19510 transitions. [2021-07-09 17:53:42,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 19510 transitions. [2021-07-09 17:53:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:42,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:42,173 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:42,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-07-09 17:53:42,374 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:42,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:42,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1371190464, now seen corresponding path program 2 times [2021-07-09 17:53:42,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:42,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703925885] [2021-07-09 17:53:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:42,562 INFO 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 17:53:42,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:42,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703925885] [2021-07-09 17:53:42,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703925885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:42,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907735514] [2021-07-09 17:53:42,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:42,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:42,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:42,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:53:42,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:42,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:42,747 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 17:53:42,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:42,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:42,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:42,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:53:42,884 INFO 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 17:53:42,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907735514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:42,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:42,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:53:42,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949509792] [2021-07-09 17:53:42,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:42,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:42,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:42,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:42,885 INFO L87 Difference]: Start difference. First operand 4370 states and 19510 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:44,932 INFO L93 Difference]: Finished difference Result 5896 states and 25629 transitions. [2021-07-09 17:53:44,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:53:44,933 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:44,949 INFO L225 Difference]: With dead ends: 5896 [2021-07-09 17:53:44,950 INFO L226 Difference]: Without dead ends: 5757 [2021-07-09 17:53:44,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1378.8ms TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:53:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5757 states. [2021-07-09 17:53:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5757 to 4363. [2021-07-09 17:53:45,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 4362 states have (on average 4.466758367721229) internal successors, (19484), 4362 states have internal predecessors, (19484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 19484 transitions. [2021-07-09 17:53:45,038 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 19484 transitions. Word has length 30 [2021-07-09 17:53:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:45,038 INFO L482 AbstractCegarLoop]: Abstraction has 4363 states and 19484 transitions. [2021-07-09 17:53:45,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:45,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 19484 transitions. [2021-07-09 17:53:45,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:45,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:45,046 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:45,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-07-09 17:53:45,247 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:45,247 INFO L82 PathProgramCache]: Analyzing trace with hash -692523458, now seen corresponding path program 1 times [2021-07-09 17:53:45,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:45,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926836500] [2021-07-09 17:53:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:45,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:45,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926836500] [2021-07-09 17:53:45,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926836500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:45,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389182517] [2021-07-09 17:53:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:45,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:45,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:45,545 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 17:53:45,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:45,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:45,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:45,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:53:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:45,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389182517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:45,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:45,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:53:45,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327821381] [2021-07-09 17:53:45,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:53:45,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:45,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:53:45,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:53:45,599 INFO L87 Difference]: Start difference. First operand 4363 states and 19484 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:47,228 INFO L93 Difference]: Finished difference Result 5490 states and 24056 transitions. [2021-07-09 17:53:47,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:53:47,229 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:47,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:47,243 INFO L225 Difference]: With dead ends: 5490 [2021-07-09 17:53:47,243 INFO L226 Difference]: Without dead ends: 5417 [2021-07-09 17:53:47,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1134.6ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:53:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2021-07-09 17:53:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 4372. [2021-07-09 17:53:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.466254861587737) internal successors, (19522), 4371 states have internal predecessors, (19522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:47,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 19522 transitions. [2021-07-09 17:53:47,345 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 19522 transitions. Word has length 30 [2021-07-09 17:53:47,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:47,345 INFO L482 AbstractCegarLoop]: Abstraction has 4372 states and 19522 transitions. [2021-07-09 17:53:47,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:47,345 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 19522 transitions. [2021-07-09 17:53:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:47,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:47,355 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:47,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:47,555 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:47,555 INFO L82 PathProgramCache]: Analyzing trace with hash 833547620, now seen corresponding path program 2 times [2021-07-09 17:53:47,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:47,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618948417] [2021-07-09 17:53:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:47,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:47,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618948417] [2021-07-09 17:53:47,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618948417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:47,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265752234] [2021-07-09 17:53:47,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:53:47,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:47,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:47,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:53:47,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:47,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:47,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-09 17:53:47,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:47,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:47,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:47,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:53:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:47,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265752234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:47,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:47,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:53:47,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229422124] [2021-07-09 17:53:47,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:53:47,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:47,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:53:47,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:53:47,951 INFO L87 Difference]: Start difference. First operand 4372 states and 19522 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:49,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:49,506 INFO L93 Difference]: Finished difference Result 5529 states and 24268 transitions. [2021-07-09 17:53:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:53:49,507 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:49,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:49,522 INFO L225 Difference]: With dead ends: 5529 [2021-07-09 17:53:49,522 INFO L226 Difference]: Without dead ends: 5450 [2021-07-09 17:53:49,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 987.8ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:53:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-07-09 17:53:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 4364. [2021-07-09 17:53:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4364 states, 4363 states have (on average 4.467109786843915) internal successors, (19490), 4363 states have internal predecessors, (19490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:49,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4364 states to 4364 states and 19490 transitions. [2021-07-09 17:53:49,612 INFO L78 Accepts]: Start accepts. Automaton has 4364 states and 19490 transitions. Word has length 30 [2021-07-09 17:53:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:49,612 INFO L482 AbstractCegarLoop]: Abstraction has 4364 states and 19490 transitions. [2021-07-09 17:53:49,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 4364 states and 19490 transitions. [2021-07-09 17:53:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:49,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:49,621 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, 1] [2021-07-09 17:53:49,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-07-09 17:53:49,822 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:49,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:49,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1582633598, now seen corresponding path program 3 times [2021-07-09 17:53:49,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:49,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110023441] [2021-07-09 17:53:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:49,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:49,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110023441] [2021-07-09 17:53:49,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110023441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:49,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086497600] [2021-07-09 17:53:49,958 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 17:53:49,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:53:49,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:49,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:53:49,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:50,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:50,162 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 17:53:50,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:50,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:50,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:50,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-07-09 17:53:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:50,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086497600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:50,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:50,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:53:50,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309883688] [2021-07-09 17:53:50,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:50,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:50,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:50,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:50,268 INFO L87 Difference]: Start difference. First operand 4364 states and 19490 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:52,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:52,580 INFO L93 Difference]: Finished difference Result 5977 states and 25770 transitions. [2021-07-09 17:53:52,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:53:52,580 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:52,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:52,597 INFO L225 Difference]: With dead ends: 5977 [2021-07-09 17:53:52,597 INFO L226 Difference]: Without dead ends: 5738 [2021-07-09 17:53:52,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1608.3ms TimeCoverageRelationStatistics Valid=456, Invalid=2514, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:53:52,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5738 states. [2021-07-09 17:53:52,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5738 to 4377. [2021-07-09 17:53:52,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 4376 states have (on average 4.466407678244972) internal successors, (19545), 4376 states have internal predecessors, (19545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 19545 transitions. [2021-07-09 17:53:52,702 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 19545 transitions. Word has length 30 [2021-07-09 17:53:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:52,702 INFO L482 AbstractCegarLoop]: Abstraction has 4377 states and 19545 transitions. [2021-07-09 17:53:52,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 19545 transitions. [2021-07-09 17:53:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:52,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:52,710 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:52,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:52,911 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:52,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:52,911 INFO L82 PathProgramCache]: Analyzing trace with hash -716978146, now seen corresponding path program 3 times [2021-07-09 17:53:52,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:52,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891832592] [2021-07-09 17:53:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:53,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:53,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891832592] [2021-07-09 17:53:53,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891832592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:53,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810597639] [2021-07-09 17:53:53,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:53,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:53:53,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:53:53,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:53,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:53,365 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 17:53:53,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:53,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:53,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:53,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-07-09 17:53:53,447 INFO 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 17:53:53,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810597639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:53,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:53,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 17:53:53,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293053809] [2021-07-09 17:53:53,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:53:53,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:53,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:53:53,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:53:53,448 INFO L87 Difference]: Start difference. First operand 4377 states and 19545 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:55,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:55,839 INFO L93 Difference]: Finished difference Result 6249 states and 26802 transitions. [2021-07-09 17:53:55,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:53:55,839 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:55,854 INFO L225 Difference]: With dead ends: 6249 [2021-07-09 17:53:55,854 INFO L226 Difference]: Without dead ends: 6018 [2021-07-09 17:53:55,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1796.1ms TimeCoverageRelationStatistics Valid=511, Invalid=2681, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:53:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2021-07-09 17:53:55,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 4368. [2021-07-09 17:53:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4368 states, 4367 states have (on average 4.468055873597435) internal successors, (19512), 4367 states have internal predecessors, (19512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4368 states to 4368 states and 19512 transitions. [2021-07-09 17:53:55,942 INFO L78 Accepts]: Start accepts. Automaton has 4368 states and 19512 transitions. Word has length 30 [2021-07-09 17:53:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:55,942 INFO L482 AbstractCegarLoop]: Abstraction has 4368 states and 19512 transitions. [2021-07-09 17:53:55,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 4368 states and 19512 transitions. [2021-07-09 17:53:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:55,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:55,951 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:56,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:56,152 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:56,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1510857112, now seen corresponding path program 4 times [2021-07-09 17:53:56,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:56,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577906101] [2021-07-09 17:53:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:56,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:56,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577906101] [2021-07-09 17:53:56,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577906101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:56,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090904409] [2021-07-09 17:53:56,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:56,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:56,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:56,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:56,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:56,434 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 17:53:56,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:56,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:56,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:56,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:53:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:56,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090904409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:56,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:56,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:53:56,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554364166] [2021-07-09 17:53:56,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:53:56,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:56,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:53:56,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:53:56,505 INFO L87 Difference]: Start difference. First operand 4368 states and 19512 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:57,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:57,674 INFO L93 Difference]: Finished difference Result 5470 states and 23988 transitions. [2021-07-09 17:53:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:53:57,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:57,691 INFO L225 Difference]: With dead ends: 5470 [2021-07-09 17:53:57,691 INFO L226 Difference]: Without dead ends: 5397 [2021-07-09 17:53:57,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 872.8ms TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:53:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-07-09 17:53:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 4380. [2021-07-09 17:53:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 4.4674583238182235) internal successors, (19563), 4379 states have internal predecessors, (19563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 19563 transitions. [2021-07-09 17:53:57,780 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 19563 transitions. Word has length 30 [2021-07-09 17:53:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:57,780 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 19563 transitions. [2021-07-09 17:53:57,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 19563 transitions. [2021-07-09 17:53:57,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:57,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:57,789 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:57,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-07-09 17:53:57,989 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:57,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1258039106, now seen corresponding path program 5 times [2021-07-09 17:53:57,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:57,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664033892] [2021-07-09 17:53:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:58,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:58,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664033892] [2021-07-09 17:53:58,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664033892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:58,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489787012] [2021-07-09 17:53:58,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:58,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:58,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:58,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:58,269 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 17:53:58,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:58,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:58,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:58,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:53:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:58,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489787012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:58,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:58,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:53:58,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890825956] [2021-07-09 17:53:58,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:53:58,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:53:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:53:58,327 INFO L87 Difference]: Start difference. First operand 4380 states and 19563 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:59,380 INFO L93 Difference]: Finished difference Result 5476 states and 24063 transitions. [2021-07-09 17:53:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:53:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:53:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:59,394 INFO L225 Difference]: With dead ends: 5476 [2021-07-09 17:53:59,394 INFO L226 Difference]: Without dead ends: 5401 [2021-07-09 17:53:59,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 776.5ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:53:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-07-09 17:53:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4371. [2021-07-09 17:53:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 4.467963386727689) internal successors, (19525), 4370 states have internal predecessors, (19525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 19525 transitions. [2021-07-09 17:53:59,527 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 19525 transitions. Word has length 30 [2021-07-09 17:53:59,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:59,527 INFO L482 AbstractCegarLoop]: Abstraction has 4371 states and 19525 transitions. [2021-07-09 17:53:59,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:59,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 19525 transitions. [2021-07-09 17:53:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:53:59,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:59,536 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:59,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-07-09 17:53:59,736 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:59,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1039746178, now seen corresponding path program 6 times [2021-07-09 17:53:59,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:59,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989626825] [2021-07-09 17:53:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:59,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:59,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989626825] [2021-07-09 17:53:59,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989626825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:59,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971236051] [2021-07-09 17:53:59,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:53:59,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:53:59,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:59,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:59,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:00,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:00,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:00,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:00,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:00,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-09 17:54:00,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:00,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:00,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:00,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:91 [2021-07-09 17:54:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:00,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971236051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:00,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:00,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 17:54:00,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511003762] [2021-07-09 17:54:00,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:00,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:00,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:00,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:00,226 INFO L87 Difference]: Start difference. First operand 4371 states and 19525 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:02,287 INFO L93 Difference]: Finished difference Result 5542 states and 24211 transitions. [2021-07-09 17:54:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:54:02,287 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:02,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:02,301 INFO L225 Difference]: With dead ends: 5542 [2021-07-09 17:54:02,302 INFO L226 Difference]: Without dead ends: 5453 [2021-07-09 17:54:02,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1574.6ms TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:54:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2021-07-09 17:54:02,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4383. [2021-07-09 17:54:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4383 states, 4382 states have (on average 4.466910086718394) internal successors, (19574), 4382 states have internal predecessors, (19574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4383 states to 4383 states and 19574 transitions. [2021-07-09 17:54:02,389 INFO L78 Accepts]: Start accepts. Automaton has 4383 states and 19574 transitions. Word has length 30 [2021-07-09 17:54:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:02,389 INFO L482 AbstractCegarLoop]: Abstraction has 4383 states and 19574 transitions. [2021-07-09 17:54:02,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4383 states and 19574 transitions. [2021-07-09 17:54:02,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:02,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:02,398 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:02,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:02,599 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:02,599 INFO L82 PathProgramCache]: Analyzing trace with hash 215379232, now seen corresponding path program 7 times [2021-07-09 17:54:02,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:02,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441856166] [2021-07-09 17:54:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:02,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:02,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441856166] [2021-07-09 17:54:02,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441856166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:02,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198527596] [2021-07-09 17:54:02,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:02,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:02,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:54:02,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:02,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:02,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:02,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:54:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:02,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198527596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:02,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:02,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:54:02,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159049246] [2021-07-09 17:54:02,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:54:02,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:03,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:54:03,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:03,000 INFO L87 Difference]: Start difference. First operand 4383 states and 19574 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:04,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:04,359 INFO L93 Difference]: Finished difference Result 5522 states and 24182 transitions. [2021-07-09 17:54:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:54:04,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:04,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:04,374 INFO L225 Difference]: With dead ends: 5522 [2021-07-09 17:54:04,374 INFO L226 Difference]: Without dead ends: 5463 [2021-07-09 17:54:04,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 957.5ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:54:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-07-09 17:54:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4377. [2021-07-09 17:54:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 4376 states have (on average 4.467321755027422) internal successors, (19549), 4376 states have internal predecessors, (19549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 19549 transitions. [2021-07-09 17:54:04,464 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 19549 transitions. Word has length 30 [2021-07-09 17:54:04,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:04,464 INFO L482 AbstractCegarLoop]: Abstraction has 4377 states and 19549 transitions. [2021-07-09 17:54:04,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:04,464 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 19549 transitions. [2021-07-09 17:54:04,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:04,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:04,473 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:04,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:04,674 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:04,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:04,674 INFO L82 PathProgramCache]: Analyzing trace with hash -419262112, now seen corresponding path program 8 times [2021-07-09 17:54:04,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:04,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189531316] [2021-07-09 17:54:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:04,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:04,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189531316] [2021-07-09 17:54:04,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189531316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:04,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289220711] [2021-07-09 17:54:04,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:04,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:04,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:04,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:54:04,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:04,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:04,979 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 17:54:04,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:04,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:04,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:04,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:54:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:05,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289220711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:05,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:05,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:54:05,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33170867] [2021-07-09 17:54:05,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:05,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:05,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:05,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:05,124 INFO L87 Difference]: Start difference. First operand 4377 states and 19549 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:06,723 INFO L93 Difference]: Finished difference Result 5674 states and 24710 transitions. [2021-07-09 17:54:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:54:06,723 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:06,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:06,740 INFO L225 Difference]: With dead ends: 5674 [2021-07-09 17:54:06,740 INFO L226 Difference]: Without dead ends: 5551 [2021-07-09 17:54:06,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1170.5ms TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:54:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-07-09 17:54:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4371. [2021-07-09 17:54:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 4.467963386727689) internal successors, (19525), 4370 states have internal predecessors, (19525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 19525 transitions. [2021-07-09 17:54:06,834 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 19525 transitions. Word has length 30 [2021-07-09 17:54:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:06,834 INFO L482 AbstractCegarLoop]: Abstraction has 4371 states and 19525 transitions. [2021-07-09 17:54:06,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 19525 transitions. [2021-07-09 17:54:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:06,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:06,843 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:07,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:07,044 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:07,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:07,044 INFO L82 PathProgramCache]: Analyzing trace with hash 352000544, now seen corresponding path program 9 times [2021-07-09 17:54:07,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:07,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074769357] [2021-07-09 17:54:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:07,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:07,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074769357] [2021-07-09 17:54:07,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074769357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:07,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313121533] [2021-07-09 17:54:07,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:07,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:54:07,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:54:07,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:07,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:07,331 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 17:54:07,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:07,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:07,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:07,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:54:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:07,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313121533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:07,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:07,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:54:07,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839072743] [2021-07-09 17:54:07,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:07,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:07,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:07,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:07,472 INFO L87 Difference]: Start difference. First operand 4371 states and 19525 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:09,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:09,163 INFO L93 Difference]: Finished difference Result 5665 states and 24676 transitions. [2021-07-09 17:54:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:54:09,163 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:09,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:09,177 INFO L225 Difference]: With dead ends: 5665 [2021-07-09 17:54:09,177 INFO L226 Difference]: Without dead ends: 5523 [2021-07-09 17:54:09,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1293.7ms TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:54:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2021-07-09 17:54:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 4372. [2021-07-09 17:54:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.468313886982384) internal successors, (19531), 4371 states have internal predecessors, (19531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 19531 transitions. [2021-07-09 17:54:09,263 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 19531 transitions. Word has length 30 [2021-07-09 17:54:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:09,263 INFO L482 AbstractCegarLoop]: Abstraction has 4372 states and 19531 transitions. [2021-07-09 17:54:09,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 19531 transitions. [2021-07-09 17:54:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:09,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:09,272 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:09,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-07-09 17:54:09,473 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:09,473 INFO L82 PathProgramCache]: Analyzing trace with hash -284466310, now seen corresponding path program 10 times [2021-07-09 17:54:09,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:09,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171493334] [2021-07-09 17:54:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:09,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:09,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171493334] [2021-07-09 17:54:09,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171493334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:09,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046817260] [2021-07-09 17:54:09,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:09,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:09,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:09,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:09,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:09,755 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 21 treesize of output 13 [2021-07-09 17:54:09,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:09,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:09,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:09,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:54:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:09,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046817260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:09,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:09,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:54:09,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133197532] [2021-07-09 17:54:09,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:54:09,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:09,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:54:09,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:09,831 INFO L87 Difference]: Start difference. First operand 4372 states and 19531 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:11,023 INFO L93 Difference]: Finished difference Result 5650 states and 24728 transitions. [2021-07-09 17:54:11,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:54:11,024 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:11,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:11,040 INFO L225 Difference]: With dead ends: 5650 [2021-07-09 17:54:11,040 INFO L226 Difference]: Without dead ends: 5586 [2021-07-09 17:54:11,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 721.2ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:54:11,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2021-07-09 17:54:11,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 4369. [2021-07-09 17:54:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4368 states have (on average 4.468177655677656) internal successors, (19517), 4368 states have internal predecessors, (19517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 19517 transitions. [2021-07-09 17:54:11,138 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 19517 transitions. Word has length 30 [2021-07-09 17:54:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:11,138 INFO L482 AbstractCegarLoop]: Abstraction has 4369 states and 19517 transitions. [2021-07-09 17:54:11,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 19517 transitions. [2021-07-09 17:54:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:11,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:11,147 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:11,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-09 17:54:11,347 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:11,348 INFO L82 PathProgramCache]: Analyzing trace with hash 155432930, now seen corresponding path program 11 times [2021-07-09 17:54:11,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:11,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407472609] [2021-07-09 17:54:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:11,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:11,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407472609] [2021-07-09 17:54:11,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407472609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:11,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684298405] [2021-07-09 17:54:11,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:11,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:54:11,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:11,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:11,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:11,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:11,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:11,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-07-09 17:54:11,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:54:11,734 INFO L628 ElimStorePlain]: treesize reduction 55, result has 28.6 percent of original size [2021-07-09 17:54:11,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:11,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-07-09 17:54:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:11,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684298405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:11,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:11,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:54:11,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975800412] [2021-07-09 17:54:11,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:11,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:11,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:11,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:11,838 INFO L87 Difference]: Start difference. First operand 4369 states and 19517 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:14,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:14,188 INFO L93 Difference]: Finished difference Result 5952 states and 25747 transitions. [2021-07-09 17:54:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:54:14,188 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:14,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:14,204 INFO L225 Difference]: With dead ends: 5952 [2021-07-09 17:54:14,204 INFO L226 Difference]: Without dead ends: 5713 [2021-07-09 17:54:14,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1583.2ms TimeCoverageRelationStatistics Valid=404, Invalid=2676, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:54:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2021-07-09 17:54:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 4406. [2021-07-09 17:54:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 4405 states have (on average 4.465380249716231) internal successors, (19670), 4405 states have internal predecessors, (19670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 19670 transitions. [2021-07-09 17:54:14,308 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 19670 transitions. Word has length 30 [2021-07-09 17:54:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:14,308 INFO L482 AbstractCegarLoop]: Abstraction has 4406 states and 19670 transitions. [2021-07-09 17:54:14,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 19670 transitions. [2021-07-09 17:54:14,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:14,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:14,318 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:14,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-09 17:54:14,518 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:14,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1021088382, now seen corresponding path program 4 times [2021-07-09 17:54:14,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:14,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263609916] [2021-07-09 17:54:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:14,695 INFO 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 17:54:14,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:14,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263609916] [2021-07-09 17:54:14,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263609916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:14,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88574191] [2021-07-09 17:54:14,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:14,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:14,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:14,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:14,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:14,929 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 17:54:14,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:14,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:14,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:14,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:54:14,967 INFO 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 17:54:14,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88574191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:14,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:14,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:54:14,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800383906] [2021-07-09 17:54:14,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:14,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:14,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:14,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:14,968 INFO L87 Difference]: Start difference. First operand 4406 states and 19670 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:16,537 INFO L93 Difference]: Finished difference Result 6128 states and 26578 transitions. [2021-07-09 17:54:16,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:54:16,537 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:16,553 INFO L225 Difference]: With dead ends: 6128 [2021-07-09 17:54:16,554 INFO L226 Difference]: Without dead ends: 5976 [2021-07-09 17:54:16,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1012.5ms TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:54:16,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2021-07-09 17:54:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 4393. [2021-07-09 17:54:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4393 states, 4392 states have (on average 4.466074681238616) internal successors, (19615), 4392 states have internal predecessors, (19615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4393 states to 4393 states and 19615 transitions. [2021-07-09 17:54:16,708 INFO L78 Accepts]: Start accepts. Automaton has 4393 states and 19615 transitions. Word has length 30 [2021-07-09 17:54:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:16,708 INFO L482 AbstractCegarLoop]: Abstraction has 4393 states and 19615 transitions. [2021-07-09 17:54:16,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4393 states and 19615 transitions. [2021-07-09 17:54:16,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:16,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:16,717 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:16,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:16,918 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:16,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:16,918 INFO L82 PathProgramCache]: Analyzing trace with hash -113313498, now seen corresponding path program 12 times [2021-07-09 17:54:16,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:16,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161252501] [2021-07-09 17:54:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:17,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:17,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161252501] [2021-07-09 17:54:17,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161252501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:17,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474292565] [2021-07-09 17:54:17,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:17,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:54:17,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:54:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:17,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:17,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:17,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:17,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2021-07-09 17:54:17,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:17,403 INFO L628 ElimStorePlain]: treesize reduction 29, result has 58.6 percent of original size [2021-07-09 17:54:17,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:17,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:42 [2021-07-09 17:54:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:17,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474292565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:17,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:17,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:54:17,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36623070] [2021-07-09 17:54:17,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:17,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:17,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:17,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:17,511 INFO L87 Difference]: Start difference. First operand 4393 states and 19615 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:19,546 INFO L93 Difference]: Finished difference Result 5726 states and 24922 transitions. [2021-07-09 17:54:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:54:19,546 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:19,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:19,562 INFO L225 Difference]: With dead ends: 5726 [2021-07-09 17:54:19,562 INFO L226 Difference]: Without dead ends: 5572 [2021-07-09 17:54:19,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1396.2ms TimeCoverageRelationStatistics Valid=461, Invalid=2295, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:54:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5572 states. [2021-07-09 17:54:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5572 to 4394. [2021-07-09 17:54:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4394 states, 4393 states have (on average 4.46642385613476) internal successors, (19621), 4393 states have internal predecessors, (19621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 19621 transitions. [2021-07-09 17:54:19,657 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 19621 transitions. Word has length 30 [2021-07-09 17:54:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:19,657 INFO L482 AbstractCegarLoop]: Abstraction has 4394 states and 19621 transitions. [2021-07-09 17:54:19,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 19621 transitions. [2021-07-09 17:54:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:19,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:19,666 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:19,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:19,869 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash -749780352, now seen corresponding path program 13 times [2021-07-09 17:54:19,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:19,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235133670] [2021-07-09 17:54:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:20,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:20,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235133670] [2021-07-09 17:54:20,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235133670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:20,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317135827] [2021-07-09 17:54:20,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:20,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:20,168 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 17:54:20,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:20,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:20,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:20,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-09 17:54:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:20,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317135827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:20,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:20,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:54:20,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596768075] [2021-07-09 17:54:20,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:54:20,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:20,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:54:20,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:20,229 INFO L87 Difference]: Start difference. First operand 4394 states and 19621 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:21,716 INFO L93 Difference]: Finished difference Result 5770 states and 25242 transitions. [2021-07-09 17:54:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:54:21,717 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:21,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:21,732 INFO L225 Difference]: With dead ends: 5770 [2021-07-09 17:54:21,732 INFO L226 Difference]: Without dead ends: 5690 [2021-07-09 17:54:21,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 965.7ms TimeCoverageRelationStatistics Valid=302, Invalid=1590, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:54:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2021-07-09 17:54:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4373. [2021-07-09 17:54:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4373 states, 4372 states have (on average 4.469121683440073) internal successors, (19539), 4372 states have internal predecessors, (19539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:21,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4373 states to 4373 states and 19539 transitions. [2021-07-09 17:54:21,829 INFO L78 Accepts]: Start accepts. Automaton has 4373 states and 19539 transitions. Word has length 30 [2021-07-09 17:54:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:21,830 INFO L482 AbstractCegarLoop]: Abstraction has 4373 states and 19539 transitions. [2021-07-09 17:54:21,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 4373 states and 19539 transitions. [2021-07-09 17:54:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:21,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:21,840 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:22,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-07-09 17:54:22,045 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:22,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1582606780, now seen corresponding path program 1 times [2021-07-09 17:54:22,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:22,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905909520] [2021-07-09 17:54:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:22,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:22,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905909520] [2021-07-09 17:54:22,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905909520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:22,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894299165] [2021-07-09 17:54:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:22,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:22,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:22,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:22,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:22,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:22,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:54:22,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:22,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:22,451 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 17:54:22,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 17:54:22,480 INFO 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 17:54:22,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894299165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:22,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:22,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-09 17:54:22,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829686478] [2021-07-09 17:54:22,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:54:22,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:22,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:54:22,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:54:22,481 INFO L87 Difference]: Start difference. First operand 4373 states and 19539 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:23,390 INFO L93 Difference]: Finished difference Result 5093 states and 22395 transitions. [2021-07-09 17:54:23,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:54:23,391 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:23,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:23,405 INFO L225 Difference]: With dead ends: 5093 [2021-07-09 17:54:23,405 INFO L226 Difference]: Without dead ends: 5020 [2021-07-09 17:54:23,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:23,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2021-07-09 17:54:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 4418. [2021-07-09 17:54:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4418 states, 4417 states have (on average 4.470455059995472) internal successors, (19746), 4417 states have internal predecessors, (19746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4418 states to 4418 states and 19746 transitions. [2021-07-09 17:54:23,528 INFO L78 Accepts]: Start accepts. Automaton has 4418 states and 19746 transitions. Word has length 30 [2021-07-09 17:54:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:23,528 INFO L482 AbstractCegarLoop]: Abstraction has 4418 states and 19746 transitions. [2021-07-09 17:54:23,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4418 states and 19746 transitions. [2021-07-09 17:54:23,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:23,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:23,538 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:23,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:23,739 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:23,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:23,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1186289438, now seen corresponding path program 2 times [2021-07-09 17:54:23,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:23,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557993870] [2021-07-09 17:54:23,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:23,891 INFO 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 17:54:23,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:23,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557993870] [2021-07-09 17:54:23,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557993870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:23,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001800626] [2021-07-09 17:54:23,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:23,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:23,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:23,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:23,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:24,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:24,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:24,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:24,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:54:24,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:24,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:24,144 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 17:54:24,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 17:54:24,177 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 17:54:24,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001800626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:24,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:24,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-09 17:54:24,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800055626] [2021-07-09 17:54:24,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:54:24,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:24,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:54:24,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:54:24,179 INFO L87 Difference]: Start difference. First operand 4418 states and 19746 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:24,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:24,947 INFO L93 Difference]: Finished difference Result 5116 states and 22506 transitions. [2021-07-09 17:54:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:54:24,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:24,961 INFO L225 Difference]: With dead ends: 5116 [2021-07-09 17:54:24,962 INFO L226 Difference]: Without dead ends: 5041 [2021-07-09 17:54:24,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:24,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5041 states. [2021-07-09 17:54:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5041 to 4407. [2021-07-09 17:54:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 4406 states have (on average 4.470721743077622) internal successors, (19698), 4406 states have internal predecessors, (19698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 19698 transitions. [2021-07-09 17:54:25,055 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 19698 transitions. Word has length 30 [2021-07-09 17:54:25,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:25,055 INFO L482 AbstractCegarLoop]: Abstraction has 4407 states and 19698 transitions. [2021-07-09 17:54:25,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 19698 transitions. [2021-07-09 17:54:25,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:25,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:25,064 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:25,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:25,265 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:25,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:25,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1423372772, now seen corresponding path program 14 times [2021-07-09 17:54:25,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:25,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670147041] [2021-07-09 17:54:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:25,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:25,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670147041] [2021-07-09 17:54:25,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670147041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:25,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441183187] [2021-07-09 17:54:25,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:25,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:25,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:25,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:25,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:25,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:25,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:25,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:25,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:54:25,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:25,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:25,728 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 17:54:25,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 17:54:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:25,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441183187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:25,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:25,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:54:25,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102513458] [2021-07-09 17:54:25,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:54:25,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:25,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:54:25,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:54:25,778 INFO L87 Difference]: Start difference. First operand 4407 states and 19698 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:26,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:26,481 INFO L93 Difference]: Finished difference Result 4920 states and 21711 transitions. [2021-07-09 17:54:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:54:26,481 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:26,494 INFO L225 Difference]: With dead ends: 4920 [2021-07-09 17:54:26,494 INFO L226 Difference]: Without dead ends: 4847 [2021-07-09 17:54:26,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 523.7ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:54:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-07-09 17:54:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 4419. [2021-07-09 17:54:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4419 states, 4418 states have (on average 4.469895880488909) internal successors, (19748), 4418 states have internal predecessors, (19748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 19748 transitions. [2021-07-09 17:54:26,587 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 19748 transitions. Word has length 30 [2021-07-09 17:54:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:26,587 INFO L482 AbstractCegarLoop]: Abstraction has 4419 states and 19748 transitions. [2021-07-09 17:54:26,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:26,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 19748 transitions. [2021-07-09 17:54:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:26,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:26,596 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:26,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-07-09 17:54:26,797 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:26,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:26,797 INFO L82 PathProgramCache]: Analyzing trace with hash -802888706, now seen corresponding path program 15 times [2021-07-09 17:54:26,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:26,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374558516] [2021-07-09 17:54:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:26,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:26,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374558516] [2021-07-09 17:54:26,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374558516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:26,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387997248] [2021-07-09 17:54:26,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:27,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:54:27,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:27,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:27,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:27,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:27,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:27,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:54:27,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:27,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:27,194 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 17:54:27,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 17:54:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:27,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387997248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:27,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:27,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-09 17:54:27,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885862603] [2021-07-09 17:54:27,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:54:27,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:27,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:54:27,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:54:27,224 INFO L87 Difference]: Start difference. First operand 4419 states and 19748 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:27,974 INFO L93 Difference]: Finished difference Result 4939 states and 21819 transitions. [2021-07-09 17:54:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:54:27,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:27,988 INFO L225 Difference]: With dead ends: 4939 [2021-07-09 17:54:27,988 INFO L226 Difference]: Without dead ends: 4873 [2021-07-09 17:54:27,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4873 states. [2021-07-09 17:54:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4873 to 4413. [2021-07-09 17:54:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4412 states have (on average 4.470534904805077) internal successors, (19724), 4412 states have internal predecessors, (19724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 19724 transitions. [2021-07-09 17:54:28,084 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 19724 transitions. Word has length 30 [2021-07-09 17:54:28,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:28,084 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 19724 transitions. [2021-07-09 17:54:28,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:28,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 19724 transitions. [2021-07-09 17:54:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:28,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:28,093 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:28,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:28,294 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:28,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:28,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1558152092, now seen corresponding path program 16 times [2021-07-09 17:54:28,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:28,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528115389] [2021-07-09 17:54:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:28,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:28,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528115389] [2021-07-09 17:54:28,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528115389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:28,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562763441] [2021-07-09 17:54:28,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:28,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:28,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:28,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:28,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:28,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:28,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:28,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 17:54:28,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:28,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:28,751 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 17:54:28,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-09 17:54:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:28,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562763441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:28,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:28,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:54:28,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979234441] [2021-07-09 17:54:28,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:54:28,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:28,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:54:28,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:28,795 INFO L87 Difference]: Start difference. First operand 4413 states and 19724 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:30,062 INFO L93 Difference]: Finished difference Result 5287 states and 23188 transitions. [2021-07-09 17:54:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:54:30,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:30,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:30,077 INFO L225 Difference]: With dead ends: 5287 [2021-07-09 17:54:30,077 INFO L226 Difference]: Without dead ends: 5223 [2021-07-09 17:54:30,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 802.5ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:54:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-07-09 17:54:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 4412. [2021-07-09 17:54:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 4411 states have (on average 4.471094989798232) internal successors, (19722), 4411 states have internal predecessors, (19722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 19722 transitions. [2021-07-09 17:54:30,171 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 19722 transitions. Word has length 30 [2021-07-09 17:54:30,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:30,171 INFO L482 AbstractCegarLoop]: Abstraction has 4412 states and 19722 transitions. [2021-07-09 17:54:30,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 19722 transitions. [2021-07-09 17:54:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:30,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:30,180 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:30,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:30,381 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:30,381 INFO L82 PathProgramCache]: Analyzing trace with hash 609639870, now seen corresponding path program 17 times [2021-07-09 17:54:30,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:30,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347939724] [2021-07-09 17:54:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:30,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:30,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347939724] [2021-07-09 17:54:30,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347939724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:30,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092798845] [2021-07-09 17:54:30,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:30,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:30,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:30,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:30,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:30,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:30,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:30,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:54:30,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:30,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:30,800 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 17:54:30,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 17:54:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:30,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092798845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:30,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:30,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-09 17:54:30,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058171580] [2021-07-09 17:54:30,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:54:30,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:30,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:54:30,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:54:30,874 INFO L87 Difference]: Start difference. First operand 4412 states and 19722 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:32,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:32,010 INFO L93 Difference]: Finished difference Result 4868 states and 21508 transitions. [2021-07-09 17:54:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:54:32,010 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:32,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:32,023 INFO L225 Difference]: With dead ends: 4868 [2021-07-09 17:54:32,024 INFO L226 Difference]: Without dead ends: 4795 [2021-07-09 17:54:32,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 804.1ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:54:32,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2021-07-09 17:54:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 4424. [2021-07-09 17:54:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 4.470495139045896) internal successors, (19773), 4423 states have internal predecessors, (19773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:32,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 19773 transitions. [2021-07-09 17:54:32,113 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 19773 transitions. Word has length 30 [2021-07-09 17:54:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:32,113 INFO L482 AbstractCegarLoop]: Abstraction has 4424 states and 19773 transitions. [2021-07-09 17:54:32,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 19773 transitions. [2021-07-09 17:54:32,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:32,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:32,123 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:32,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:32,323 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:32,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2135710948, now seen corresponding path program 18 times [2021-07-09 17:54:32,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:32,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946926141] [2021-07-09 17:54:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:32,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:32,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946926141] [2021-07-09 17:54:32,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946926141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:32,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303450392] [2021-07-09 17:54:32,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:32,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:54:32,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:32,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:54:32,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:32,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:32,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:32,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 42 [2021-07-09 17:54:32,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:32,846 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.2 percent of original size [2021-07-09 17:54:32,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:32,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:307 [2021-07-09 17:54:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:33,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303450392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:33,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:33,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:54:33,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926873248] [2021-07-09 17:54:33,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:33,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:33,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:33,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:33,140 INFO L87 Difference]: Start difference. First operand 4424 states and 19773 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:35,197 INFO L93 Difference]: Finished difference Result 4777 states and 21139 transitions. [2021-07-09 17:54:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:54:35,197 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:35,210 INFO L225 Difference]: With dead ends: 4777 [2021-07-09 17:54:35,210 INFO L226 Difference]: Without dead ends: 4700 [2021-07-09 17:54:35,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1374.9ms TimeCoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:54:35,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4700 states. [2021-07-09 17:54:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4700 to 4441. [2021-07-09 17:54:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4441 states, 4440 states have (on average 4.467567567567568) internal successors, (19836), 4440 states have internal predecessors, (19836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4441 states to 4441 states and 19836 transitions. [2021-07-09 17:54:35,296 INFO L78 Accepts]: Start accepts. Automaton has 4441 states and 19836 transitions. Word has length 30 [2021-07-09 17:54:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:35,296 INFO L482 AbstractCegarLoop]: Abstraction has 4441 states and 19836 transitions. [2021-07-09 17:54:35,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 4441 states and 19836 transitions. [2021-07-09 17:54:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:35,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:35,306 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:35,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:35,506 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:35,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1940963420, now seen corresponding path program 19 times [2021-07-09 17:54:35,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:35,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88290482] [2021-07-09 17:54:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:35,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:35,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88290482] [2021-07-09 17:54:35,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88290482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:35,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033664720] [2021-07-09 17:54:35,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:35,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:35,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:35,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:35,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:35,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:35,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:54:35,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:35,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:35,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:35,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 17:54:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:36,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033664720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:36,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:36,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-09 17:54:36,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067445537] [2021-07-09 17:54:36,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:54:36,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:36,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:54:36,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:54:36,026 INFO L87 Difference]: Start difference. First operand 4441 states and 19836 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:36,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:36,962 INFO L93 Difference]: Finished difference Result 4857 states and 21469 transitions. [2021-07-09 17:54:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:54:36,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:36,975 INFO L225 Difference]: With dead ends: 4857 [2021-07-09 17:54:36,975 INFO L226 Difference]: Without dead ends: 4784 [2021-07-09 17:54:36,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 653.8ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:54:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4784 states. [2021-07-09 17:54:37,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4784 to 4447. [2021-07-09 17:54:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4446 states have (on average 4.46693657219973) internal successors, (19860), 4446 states have internal predecessors, (19860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 19860 transitions. [2021-07-09 17:54:37,063 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 19860 transitions. Word has length 30 [2021-07-09 17:54:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:37,063 INFO L482 AbstractCegarLoop]: Abstraction has 4447 states and 19860 transitions. [2021-07-09 17:54:37,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 19860 transitions. [2021-07-09 17:54:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:37,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:37,073 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:37,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:37,274 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:37,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1320479354, now seen corresponding path program 20 times [2021-07-09 17:54:37,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:37,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126345729] [2021-07-09 17:54:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:37,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:37,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126345729] [2021-07-09 17:54:37,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126345729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:37,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697885991] [2021-07-09 17:54:37,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:37,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:37,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:37,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:37,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:37,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:37,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:37,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:37,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:54:37,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:37,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:37,707 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 17:54:37,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 17:54:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:37,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697885991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:37,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:37,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-07-09 17:54:37,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178059395] [2021-07-09 17:54:37,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:54:37,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:37,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:54:37,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:54:37,761 INFO L87 Difference]: Start difference. First operand 4447 states and 19860 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:38,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:38,667 INFO L93 Difference]: Finished difference Result 4965 states and 21923 transitions. [2021-07-09 17:54:38,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:38,667 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:38,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:38,681 INFO L225 Difference]: With dead ends: 4965 [2021-07-09 17:54:38,681 INFO L226 Difference]: Without dead ends: 4899 [2021-07-09 17:54:38,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 529.7ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:54:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-07-09 17:54:38,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4441. [2021-07-09 17:54:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4441 states, 4440 states have (on average 4.467567567567568) internal successors, (19836), 4440 states have internal predecessors, (19836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4441 states to 4441 states and 19836 transitions. [2021-07-09 17:54:38,783 INFO L78 Accepts]: Start accepts. Automaton has 4441 states and 19836 transitions. Word has length 30 [2021-07-09 17:54:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:38,783 INFO L482 AbstractCegarLoop]: Abstraction has 4441 states and 19836 transitions. [2021-07-09 17:54:38,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4441 states and 19836 transitions. [2021-07-09 17:54:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:38,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:38,792 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:38,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:38,993 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:38,993 INFO L82 PathProgramCache]: Analyzing trace with hash -549216698, now seen corresponding path program 21 times [2021-07-09 17:54:38,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:38,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250923552] [2021-07-09 17:54:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:39,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:39,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250923552] [2021-07-09 17:54:39,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250923552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:39,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405768907] [2021-07-09 17:54:39,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:39,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:54:39,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:39,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:39,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:39,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:39,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:39,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:39,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:54:39,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:39,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:39,413 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 17:54:39,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 17:54:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:39,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405768907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:39,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:39,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:54:39,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364325272] [2021-07-09 17:54:39,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:54:39,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:39,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:54:39,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:39,502 INFO L87 Difference]: Start difference. First operand 4441 states and 19836 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:40,537 INFO L93 Difference]: Finished difference Result 4991 states and 22020 transitions. [2021-07-09 17:54:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:54:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:40,551 INFO L225 Difference]: With dead ends: 4991 [2021-07-09 17:54:40,551 INFO L226 Difference]: Without dead ends: 4920 [2021-07-09 17:54:40,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 786.3ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:54:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4920 states. [2021-07-09 17:54:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4920 to 4442. [2021-07-09 17:54:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4442 states, 4441 states have (on average 4.467912632290025) internal successors, (19842), 4441 states have internal predecessors, (19842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4442 states to 4442 states and 19842 transitions. [2021-07-09 17:54:40,671 INFO L78 Accepts]: Start accepts. Automaton has 4442 states and 19842 transitions. Word has length 30 [2021-07-09 17:54:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:40,671 INFO L482 AbstractCegarLoop]: Abstraction has 4442 states and 19842 transitions. [2021-07-09 17:54:40,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:40,671 INFO L276 IsEmpty]: Start isEmpty. Operand 4442 states and 19842 transitions. [2021-07-09 17:54:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:40,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:40,680 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:40,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-07-09 17:54:40,880 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:40,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1185683552, now seen corresponding path program 22 times [2021-07-09 17:54:40,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:40,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652616406] [2021-07-09 17:54:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:41,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:41,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652616406] [2021-07-09 17:54:41,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652616406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:41,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578385710] [2021-07-09 17:54:41,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:41,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:41,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:41,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:41,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:41,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:41,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:41,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:54:41,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:41,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:41,303 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 17:54:41,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 17:54:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:41,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578385710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:41,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:41,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:54:41,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749130751] [2021-07-09 17:54:41,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:54:41,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:41,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:54:41,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:41,395 INFO L87 Difference]: Start difference. First operand 4442 states and 19842 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:42,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:42,421 INFO L93 Difference]: Finished difference Result 4969 states and 21938 transitions. [2021-07-09 17:54:42,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:54:42,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:42,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:42,435 INFO L225 Difference]: With dead ends: 4969 [2021-07-09 17:54:42,435 INFO L226 Difference]: Without dead ends: 4905 [2021-07-09 17:54:42,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 696.8ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:54:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4905 states. [2021-07-09 17:54:42,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4905 to 4439. [2021-07-09 17:54:42,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4439 states, 4438 states have (on average 4.467778278503831) internal successors, (19828), 4438 states have internal predecessors, (19828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:42,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4439 states to 4439 states and 19828 transitions. [2021-07-09 17:54:42,569 INFO L78 Accepts]: Start accepts. Automaton has 4439 states and 19828 transitions. Word has length 30 [2021-07-09 17:54:42,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:42,569 INFO L482 AbstractCegarLoop]: Abstraction has 4439 states and 19828 transitions. [2021-07-09 17:54:42,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:42,569 INFO L276 IsEmpty]: Start isEmpty. Operand 4439 states and 19828 transitions. [2021-07-09 17:54:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:42,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:42,578 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:42,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:42,778 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:42,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2049698712, now seen corresponding path program 3 times [2021-07-09 17:54:42,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:42,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810205706] [2021-07-09 17:54:42,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:42,905 INFO 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 17:54:42,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:42,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810205706] [2021-07-09 17:54:42,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810205706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:42,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682844698] [2021-07-09 17:54:42,905 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 17:54:42,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:54:42,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:42,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:54:42,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:43,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:43,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:43,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:43,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 17:54:43,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:43,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:43,188 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 17:54:43,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:93 [2021-07-09 17:54:43,311 INFO 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 17:54:43,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682844698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:43,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:43,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-09 17:54:43,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586389864] [2021-07-09 17:54:43,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:54:43,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:54:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:54:43,312 INFO L87 Difference]: Start difference. First operand 4439 states and 19828 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:44,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:44,667 INFO L93 Difference]: Finished difference Result 5357 states and 23393 transitions. [2021-07-09 17:54:44,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:54:44,667 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:44,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:44,682 INFO L225 Difference]: With dead ends: 5357 [2021-07-09 17:54:44,682 INFO L226 Difference]: Without dead ends: 5215 [2021-07-09 17:54:44,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 857.6ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:54:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5215 states. [2021-07-09 17:54:44,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5215 to 4449. [2021-07-09 17:54:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4448 states have (on average 4.470323741007194) internal successors, (19884), 4448 states have internal predecessors, (19884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 19884 transitions. [2021-07-09 17:54:44,802 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 19884 transitions. Word has length 30 [2021-07-09 17:54:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:44,802 INFO L482 AbstractCegarLoop]: Abstraction has 4449 states and 19884 transitions. [2021-07-09 17:54:44,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:44,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 19884 transitions. [2021-07-09 17:54:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:44,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:44,810 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:45,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:45,011 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:45,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1184043260, now seen corresponding path program 23 times [2021-07-09 17:54:45,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:45,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081065340] [2021-07-09 17:54:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:45,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:45,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081065340] [2021-07-09 17:54:45,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081065340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:45,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423160421] [2021-07-09 17:54:45,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:45,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:45,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:45,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:45,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:45,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:45,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:45,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:45,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 17:54:45,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:45,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:45,517 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 17:54:45,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-09 17:54:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:45,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423160421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:45,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:45,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:54:45,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644783810] [2021-07-09 17:54:45,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:54:45,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:45,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:54:45,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:45,560 INFO L87 Difference]: Start difference. First operand 4449 states and 19884 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:46,976 INFO L93 Difference]: Finished difference Result 5246 states and 23038 transitions. [2021-07-09 17:54:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:54:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:46,990 INFO L225 Difference]: With dead ends: 5246 [2021-07-09 17:54:46,990 INFO L226 Difference]: Without dead ends: 5182 [2021-07-09 17:54:46,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:54:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5182 states. [2021-07-09 17:54:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5182 to 4449. [2021-07-09 17:54:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4448 states have (on average 4.470323741007194) internal successors, (19884), 4448 states have internal predecessors, (19884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 19884 transitions. [2021-07-09 17:54:47,116 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 19884 transitions. Word has length 30 [2021-07-09 17:54:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:47,116 INFO L482 AbstractCegarLoop]: Abstraction has 4449 states and 19884 transitions. [2021-07-09 17:54:47,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 19884 transitions. [2021-07-09 17:54:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:47,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:47,126 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:47,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:47,327 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:47,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1181268604, now seen corresponding path program 24 times [2021-07-09 17:54:47,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:47,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853016344] [2021-07-09 17:54:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:47,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:47,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853016344] [2021-07-09 17:54:47,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853016344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:47,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293761738] [2021-07-09 17:54:47,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:47,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:54:47,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:47,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:54:47,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:47,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:47,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-07-09 17:54:47,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:54:47,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:47,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:47,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-09 17:54:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:47,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293761738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:47,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:47,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:54:47,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576927728] [2021-07-09 17:54:47,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:47,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:47,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:47,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:47,882 INFO L87 Difference]: Start difference. First operand 4449 states and 19884 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:49,922 INFO L93 Difference]: Finished difference Result 5843 states and 25521 transitions. [2021-07-09 17:54:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:54:49,923 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:49,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:49,937 INFO L225 Difference]: With dead ends: 5843 [2021-07-09 17:54:49,938 INFO L226 Difference]: Without dead ends: 5732 [2021-07-09 17:54:49,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1573.7ms TimeCoverageRelationStatistics Valid=566, Invalid=2974, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:54:49,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5732 states. [2021-07-09 17:54:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5732 to 4460. [2021-07-09 17:54:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 4.468939224041264) internal successors, (19927), 4459 states have internal predecessors, (19927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 19927 transitions. [2021-07-09 17:54:50,022 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 19927 transitions. Word has length 30 [2021-07-09 17:54:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:50,022 INFO L482 AbstractCegarLoop]: Abstraction has 4460 states and 19927 transitions. [2021-07-09 17:54:50,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 19927 transitions. [2021-07-09 17:54:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:50,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:50,030 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:50,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:50,231 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:50,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:50,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1687614870, now seen corresponding path program 25 times [2021-07-09 17:54:50,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:50,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796039344] [2021-07-09 17:54:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:50,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:50,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796039344] [2021-07-09 17:54:50,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796039344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:50,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258767604] [2021-07-09 17:54:50,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:50,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:50,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:50,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:50,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:50,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 17:54:50,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:50,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:50,661 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 17:54:50,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-09 17:54:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:50,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258767604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:50,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:50,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:54:50,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638177058] [2021-07-09 17:54:50,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:54:50,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:50,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:54:50,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:50,724 INFO L87 Difference]: Start difference. First operand 4460 states and 19927 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:51,716 INFO L93 Difference]: Finished difference Result 5192 states and 22825 transitions. [2021-07-09 17:54:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:54:51,716 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:51,731 INFO L225 Difference]: With dead ends: 5192 [2021-07-09 17:54:51,732 INFO L226 Difference]: Without dead ends: 5128 [2021-07-09 17:54:51,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 683.8ms TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:54:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5128 states. [2021-07-09 17:54:51,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5128 to 4450. [2021-07-09 17:54:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4450 states, 4449 states have (on average 4.470442796133963) internal successors, (19889), 4449 states have internal predecessors, (19889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4450 states to 4450 states and 19889 transitions. [2021-07-09 17:54:51,829 INFO L78 Accepts]: Start accepts. Automaton has 4450 states and 19889 transitions. Word has length 30 [2021-07-09 17:54:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:51,829 INFO L482 AbstractCegarLoop]: Abstraction has 4450 states and 19889 transitions. [2021-07-09 17:54:51,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:51,829 INFO L276 IsEmpty]: Start isEmpty. Operand 4450 states and 19889 transitions. [2021-07-09 17:54:51,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:51,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:51,838 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:52,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-09 17:54:52,039 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:52,039 INFO L82 PathProgramCache]: Analyzing trace with hash 705435170, now seen corresponding path program 4 times [2021-07-09 17:54:52,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:52,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206956887] [2021-07-09 17:54:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:52,169 INFO 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 17:54:52,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:52,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206956887] [2021-07-09 17:54:52,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206956887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:52,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548348536] [2021-07-09 17:54:52,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:52,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:52,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:52,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:52,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:52,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:52,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:52,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:52,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 17:54:52,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:52,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:52,429 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 17:54:52,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-09 17:54:52,464 INFO 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 17:54:52,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548348536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:52,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:52,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-09 17:54:52,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670188648] [2021-07-09 17:54:52,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:54:52,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:52,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:54:52,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:54:52,465 INFO L87 Difference]: Start difference. First operand 4450 states and 19889 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:53,303 INFO L93 Difference]: Finished difference Result 5159 states and 22696 transitions. [2021-07-09 17:54:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:54:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:53,317 INFO L225 Difference]: With dead ends: 5159 [2021-07-09 17:54:53,317 INFO L226 Difference]: Without dead ends: 5088 [2021-07-09 17:54:53,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:53,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-07-09 17:54:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4482. [2021-07-09 17:54:53,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4482 states, 4481 states have (on average 4.467083240348137) internal successors, (20017), 4481 states have internal predecessors, (20017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 20017 transitions. [2021-07-09 17:54:53,436 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 20017 transitions. Word has length 30 [2021-07-09 17:54:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:53,436 INFO L482 AbstractCegarLoop]: Abstraction has 4482 states and 20017 transitions. [2021-07-09 17:54:53,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 20017 transitions. [2021-07-09 17:54:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:53,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:53,445 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, 1] [2021-07-09 17:54:53,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-09 17:54:53,646 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1571090622, now seen corresponding path program 26 times [2021-07-09 17:54:53,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:53,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340268481] [2021-07-09 17:54:53,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:53,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:53,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340268481] [2021-07-09 17:54:53,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340268481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:53,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971792729] [2021-07-09 17:54:53,892 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 17:54:53,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:53,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:53,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:53,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:54,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:54,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:54,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:54,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:54,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-07-09 17:54:54,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:54:54,290 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.0 percent of original size [2021-07-09 17:54:54,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:54,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2021-07-09 17:54:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:54,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971792729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:54,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:54,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:54:54,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586914965] [2021-07-09 17:54:54,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:54,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:54,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:54,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:54,403 INFO L87 Difference]: Start difference. First operand 4482 states and 20017 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:56,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:56,516 INFO L93 Difference]: Finished difference Result 5444 states and 23623 transitions. [2021-07-09 17:54:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:54:56,517 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:56,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:56,532 INFO L225 Difference]: With dead ends: 5444 [2021-07-09 17:54:56,532 INFO L226 Difference]: Without dead ends: 5312 [2021-07-09 17:54:56,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1556.6ms TimeCoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:54:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2021-07-09 17:54:56,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 4489. [2021-07-09 17:54:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4488 states have (on average 4.465463458110517) internal successors, (20041), 4488 states have internal predecessors, (20041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:56,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 20041 transitions. [2021-07-09 17:54:56,626 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 20041 transitions. Word has length 30 [2021-07-09 17:54:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:56,626 INFO L482 AbstractCegarLoop]: Abstraction has 4489 states and 20041 transitions. [2021-07-09 17:54:56,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:56,626 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 20041 transitions. [2021-07-09 17:54:56,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:56,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:56,635 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:56,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-07-09 17:54:56,836 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:56,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1573865278, now seen corresponding path program 27 times [2021-07-09 17:54:56,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:56,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147462727] [2021-07-09 17:54:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:57,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:57,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147462727] [2021-07-09 17:54:57,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147462727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:57,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428108831] [2021-07-09 17:54:57,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:54:57,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:54:57,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:57,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:54:57,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:57,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:57,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:57,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:57,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:57,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-07-09 17:54:57,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:54:57,341 INFO L628 ElimStorePlain]: treesize reduction 14, result has 73.6 percent of original size [2021-07-09 17:54:57,350 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 17:54:57,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:53 [2021-07-09 17:54:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:57,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428108831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:57,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:57,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:54:57,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14340378] [2021-07-09 17:54:57,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:57,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:57,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:57,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:57,527 INFO L87 Difference]: Start difference. First operand 4489 states and 20041 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:59,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:59,551 INFO L93 Difference]: Finished difference Result 5454 states and 23694 transitions. [2021-07-09 17:54:59,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:54:59,552 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:54:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:59,566 INFO L225 Difference]: With dead ends: 5454 [2021-07-09 17:54:59,566 INFO L226 Difference]: Without dead ends: 5296 [2021-07-09 17:54:59,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1550.5ms TimeCoverageRelationStatistics Valid=299, Invalid=1957, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:54:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2021-07-09 17:54:59,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 4531. [2021-07-09 17:54:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4531 states, 4530 states have (on average 4.458057395143488) internal successors, (20195), 4530 states have internal predecessors, (20195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4531 states to 4531 states and 20195 transitions. [2021-07-09 17:54:59,657 INFO L78 Accepts]: Start accepts. Automaton has 4531 states and 20195 transitions. Word has length 30 [2021-07-09 17:54:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:59,657 INFO L482 AbstractCegarLoop]: Abstraction has 4531 states and 20195 transitions. [2021-07-09 17:54:59,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:59,657 INFO L276 IsEmpty]: Start isEmpty. Operand 4531 states and 20195 transitions. [2021-07-09 17:54:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:54:59,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:59,666 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:59,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:59,866 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:59,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:59,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1067519012, now seen corresponding path program 28 times [2021-07-09 17:54:59,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:59,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782622469] [2021-07-09 17:54:59,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:00,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:00,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782622469] [2021-07-09 17:55:00,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782622469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:00,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806123087] [2021-07-09 17:55:00,057 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 17:55:00,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:00,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:00,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:00,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:00,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:00,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:00,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 17:55:00,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:00,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:00,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:00,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-09 17:55:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:00,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806123087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:00,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:00,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:55:00,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364058953] [2021-07-09 17:55:00,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:55:00,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:00,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:55:00,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:55:00,424 INFO L87 Difference]: Start difference. First operand 4531 states and 20195 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:01,423 INFO L93 Difference]: Finished difference Result 5414 states and 23685 transitions. [2021-07-09 17:55:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:55:01,424 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:01,438 INFO L225 Difference]: With dead ends: 5414 [2021-07-09 17:55:01,438 INFO L226 Difference]: Without dead ends: 5350 [2021-07-09 17:55:01,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 655.4ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:55:01,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5350 states. [2021-07-09 17:55:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5350 to 4524. [2021-07-09 17:55:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4524 states, 4523 states have (on average 4.459650674331196) internal successors, (20171), 4523 states have internal predecessors, (20171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4524 states to 4524 states and 20171 transitions. [2021-07-09 17:55:01,537 INFO L78 Accepts]: Start accepts. Automaton has 4524 states and 20171 transitions. Word has length 30 [2021-07-09 17:55:01,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:01,537 INFO L482 AbstractCegarLoop]: Abstraction has 4524 states and 20171 transitions. [2021-07-09 17:55:01,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:01,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4524 states and 20171 transitions. [2021-07-09 17:55:01,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:01,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:01,546 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:01,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:01,747 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:01,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1348670500, now seen corresponding path program 29 times [2021-07-09 17:55:01,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:01,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761535712] [2021-07-09 17:55:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:01,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:01,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761535712] [2021-07-09 17:55:01,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761535712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:01,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057736138] [2021-07-09 17:55:01,941 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 17:55:01,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:55:01,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:01,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:01,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:02,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:02,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:02,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:02,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 45 [2021-07-09 17:55:02,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:55:02,236 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-07-09 17:55:02,238 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 17:55:02,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-07-09 17:55:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:02,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057736138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:02,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:02,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 17:55:02,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969753105] [2021-07-09 17:55:02,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:02,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:02,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:02,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:02,354 INFO L87 Difference]: Start difference. First operand 4524 states and 20171 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:03,787 INFO L93 Difference]: Finished difference Result 6034 states and 26173 transitions. [2021-07-09 17:55:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:55:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:03,809 INFO L225 Difference]: With dead ends: 6034 [2021-07-09 17:55:03,810 INFO L226 Difference]: Without dead ends: 5807 [2021-07-09 17:55:03,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 904.8ms TimeCoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:55:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5807 states. [2021-07-09 17:55:03,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5807 to 4548. [2021-07-09 17:55:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 4.455904992302617) internal successors, (20261), 4547 states have internal predecessors, (20261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 20261 transitions. [2021-07-09 17:55:03,925 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 20261 transitions. Word has length 30 [2021-07-09 17:55:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:03,925 INFO L482 AbstractCegarLoop]: Abstraction has 4548 states and 20261 transitions. [2021-07-09 17:55:03,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 20261 transitions. [2021-07-09 17:55:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:03,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:03,935 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:04,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-07-09 17:55:04,137 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash 336756796, now seen corresponding path program 5 times [2021-07-09 17:55:04,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:04,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086677545] [2021-07-09 17:55:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:04,299 INFO 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 17:55:04,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:04,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086677545] [2021-07-09 17:55:04,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086677545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:04,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198613895] [2021-07-09 17:55:04,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:04,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:55:04,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:04,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:04,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:04,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-09 17:55:04,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:04,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:04,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:04,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:55:04,617 INFO 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 17:55:04,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198613895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:04,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:04,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:55:04,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988550340] [2021-07-09 17:55:04,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:04,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:04,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:04,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:04,618 INFO L87 Difference]: Start difference. First operand 4548 states and 20261 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:05,957 INFO L93 Difference]: Finished difference Result 6200 states and 27089 transitions. [2021-07-09 17:55:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:55:05,957 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:05,974 INFO L225 Difference]: With dead ends: 6200 [2021-07-09 17:55:05,975 INFO L226 Difference]: Without dead ends: 6129 [2021-07-09 17:55:05,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 925.5ms TimeCoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:55:05,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6129 states. [2021-07-09 17:55:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6129 to 4540. [2021-07-09 17:55:06,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4540 states, 4539 states have (on average 4.45714915179555) internal successors, (20231), 4539 states have internal predecessors, (20231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4540 states to 4540 states and 20231 transitions. [2021-07-09 17:55:06,080 INFO L78 Accepts]: Start accepts. Automaton has 4540 states and 20231 transitions. Word has length 30 [2021-07-09 17:55:06,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:06,080 INFO L482 AbstractCegarLoop]: Abstraction has 4540 states and 20231 transitions. [2021-07-09 17:55:06,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4540 states and 20231 transitions. [2021-07-09 17:55:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:06,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:06,090 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:06,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-07-09 17:55:06,290 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:06,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1791569640, now seen corresponding path program 30 times [2021-07-09 17:55:06,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:06,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463229306] [2021-07-09 17:55:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:06,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:06,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463229306] [2021-07-09 17:55:06,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463229306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:06,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537682184] [2021-07-09 17:55:06,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:06,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:55:06,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:06,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:55:06,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:06,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:06,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:06,715 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 17:55:06,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:06,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:06,723 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 17:55:06,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-07-09 17:55:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:06,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537682184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:06,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:06,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 17:55:06,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866384163] [2021-07-09 17:55:06,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:55:06,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:06,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:55:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:55:06,782 INFO L87 Difference]: Start difference. First operand 4540 states and 20231 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:08,143 INFO L93 Difference]: Finished difference Result 5726 states and 25059 transitions. [2021-07-09 17:55:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:55:08,144 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:08,159 INFO L225 Difference]: With dead ends: 5726 [2021-07-09 17:55:08,160 INFO L226 Difference]: Without dead ends: 5655 [2021-07-09 17:55:08,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 899.9ms TimeCoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:55:08,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2021-07-09 17:55:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 4540. [2021-07-09 17:55:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4540 states, 4539 states have (on average 4.45714915179555) internal successors, (20231), 4539 states have internal predecessors, (20231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:08,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4540 states to 4540 states and 20231 transitions. [2021-07-09 17:55:08,259 INFO L78 Accepts]: Start accepts. Automaton has 4540 states and 20231 transitions. Word has length 30 [2021-07-09 17:55:08,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:08,259 INFO L482 AbstractCegarLoop]: Abstraction has 4540 states and 20231 transitions. [2021-07-09 17:55:08,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:08,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4540 states and 20231 transitions. [2021-07-09 17:55:08,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:08,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:08,268 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, 1] [2021-07-09 17:55:08,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-09 17:55:08,469 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:08,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1997051390, now seen corresponding path program 31 times [2021-07-09 17:55:08,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:08,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118123874] [2021-07-09 17:55:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:08,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:08,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118123874] [2021-07-09 17:55:08,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118123874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:08,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129028461] [2021-07-09 17:55:08,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:08,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:08,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:08,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-09 17:55:08,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:08,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:08,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:08,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-09 17:55:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:08,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129028461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:08,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:08,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:55:08,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546994409] [2021-07-09 17:55:08,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:08,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:08,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:08,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:08,895 INFO L87 Difference]: Start difference. First operand 4540 states and 20231 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:10,364 INFO L93 Difference]: Finished difference Result 5913 states and 25914 transitions. [2021-07-09 17:55:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:55:10,365 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:10,381 INFO L225 Difference]: With dead ends: 5913 [2021-07-09 17:55:10,381 INFO L226 Difference]: Without dead ends: 5849 [2021-07-09 17:55:10,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 959.6ms TimeCoverageRelationStatistics Valid=331, Invalid=1739, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:55:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5849 states. [2021-07-09 17:55:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5849 to 4524. [2021-07-09 17:55:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4524 states, 4523 states have (on average 4.459650674331196) internal successors, (20171), 4523 states have internal predecessors, (20171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4524 states to 4524 states and 20171 transitions. [2021-07-09 17:55:10,470 INFO L78 Accepts]: Start accepts. Automaton has 4524 states and 20171 transitions. Word has length 30 [2021-07-09 17:55:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:10,470 INFO L482 AbstractCegarLoop]: Abstraction has 4524 states and 20171 transitions. [2021-07-09 17:55:10,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 4524 states and 20171 transitions. [2021-07-09 17:55:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:10,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:10,479 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, 1] [2021-07-09 17:55:10,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-09 17:55:10,681 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash -276647388, now seen corresponding path program 32 times [2021-07-09 17:55:10,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:10,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211356472] [2021-07-09 17:55:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:10,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:10,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211356472] [2021-07-09 17:55:10,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211356472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:10,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607012522] [2021-07-09 17:55:10,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:11,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:11,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:11,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:55:11,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:11,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:11,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:11,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:11,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-07-09 17:55:11,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:11,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:11,247 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 17:55:11,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 [2021-07-09 17:55:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:11,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607012522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:11,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:11,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-09 17:55:11,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052317513] [2021-07-09 17:55:11,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:55:11,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:11,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:55:11,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:55:11,400 INFO L87 Difference]: Start difference. First operand 4524 states and 20171 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:13,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:13,012 INFO L93 Difference]: Finished difference Result 5027 states and 22085 transitions. [2021-07-09 17:55:13,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:55:13,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:13,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:13,027 INFO L225 Difference]: With dead ends: 5027 [2021-07-09 17:55:13,027 INFO L226 Difference]: Without dead ends: 4959 [2021-07-09 17:55:13,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1316.3ms TimeCoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:55:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-07-09 17:55:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 4518. [2021-07-09 17:55:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4518 states, 4517 states have (on average 4.460261235333186) internal successors, (20147), 4517 states have internal predecessors, (20147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4518 states to 4518 states and 20147 transitions. [2021-07-09 17:55:13,147 INFO L78 Accepts]: Start accepts. Automaton has 4518 states and 20147 transitions. Word has length 30 [2021-07-09 17:55:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:13,147 INFO L482 AbstractCegarLoop]: Abstraction has 4518 states and 20147 transitions. [2021-07-09 17:55:13,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4518 states and 20147 transitions. [2021-07-09 17:55:13,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:13,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:13,157 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:13,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-07-09 17:55:13,358 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:13,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1201506824, now seen corresponding path program 33 times [2021-07-09 17:55:13,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:13,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814693901] [2021-07-09 17:55:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:13,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:13,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814693901] [2021-07-09 17:55:13,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814693901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:13,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77757860] [2021-07-09 17:55:13,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:13,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:55:13,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:13,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:55:13,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:13,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:13,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:13,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:13,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-07-09 17:55:13,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:13,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:13,816 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 17:55:13,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 [2021-07-09 17:55:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:14,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77757860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:14,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:14,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 17:55:14,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906000971] [2021-07-09 17:55:14,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:14,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:14,021 INFO L87 Difference]: Start difference. First operand 4518 states and 20147 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:14,355 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-07-09 17:55:15,034 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-09 17:55:15,337 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-07-09 17:55:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:16,355 INFO L93 Difference]: Finished difference Result 5135 states and 22523 transitions. [2021-07-09 17:55:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:55:16,355 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:16,369 INFO L225 Difference]: With dead ends: 5135 [2021-07-09 17:55:16,369 INFO L226 Difference]: Without dead ends: 5050 [2021-07-09 17:55:16,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1964.7ms TimeCoverageRelationStatistics Valid=380, Invalid=2070, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:55:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2021-07-09 17:55:16,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 4510. [2021-07-09 17:55:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 4.4604125083167) internal successors, (20112), 4509 states have internal predecessors, (20112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 20112 transitions. [2021-07-09 17:55:16,457 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 20112 transitions. Word has length 30 [2021-07-09 17:55:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:16,457 INFO L482 AbstractCegarLoop]: Abstraction has 4510 states and 20112 transitions. [2021-07-09 17:55:16,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 20112 transitions. [2021-07-09 17:55:16,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:16,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:16,467 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:16,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:16,667 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:16,667 INFO L82 PathProgramCache]: Analyzing trace with hash 855600944, now seen corresponding path program 57 times [2021-07-09 17:55:16,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:16,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666490553] [2021-07-09 17:55:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:16,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:16,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666490553] [2021-07-09 17:55:16,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666490553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:16,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090067518] [2021-07-09 17:55:16,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:16,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:55:16,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:16,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:16,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:17,090 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 20 treesize of output 12 [2021-07-09 17:55:17,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:17,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:17,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:17,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:55:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:17,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090067518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:17,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:17,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:55:17,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728478723] [2021-07-09 17:55:17,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:17,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:17,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:17,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:17,131 INFO L87 Difference]: Start difference. First operand 4510 states and 20112 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:18,694 INFO L93 Difference]: Finished difference Result 6552 states and 28211 transitions. [2021-07-09 17:55:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:55:18,694 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:18,713 INFO L225 Difference]: With dead ends: 6552 [2021-07-09 17:55:18,713 INFO L226 Difference]: Without dead ends: 6254 [2021-07-09 17:55:18,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1060.1ms TimeCoverageRelationStatistics Valid=500, Invalid=2256, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:55:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6254 states. [2021-07-09 17:55:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6254 to 4572. [2021-07-09 17:55:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 4.452854955152046) internal successors, (20354), 4571 states have internal predecessors, (20354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 20354 transitions. [2021-07-09 17:55:18,822 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 20354 transitions. Word has length 30 [2021-07-09 17:55:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:18,822 INFO L482 AbstractCegarLoop]: Abstraction has 4572 states and 20354 transitions. [2021-07-09 17:55:18,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 20354 transitions. [2021-07-09 17:55:18,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:18,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:18,832 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:19,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-07-09 17:55:19,033 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:19,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2134626958, now seen corresponding path program 37 times [2021-07-09 17:55:19,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:19,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409236697] [2021-07-09 17:55:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:19,253 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 17:55:19,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:19,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409236697] [2021-07-09 17:55:19,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409236697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:19,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285860348] [2021-07-09 17:55:19,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:19,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:19,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:19,462 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 17:55:19,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:19,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:19,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:19,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-09 17:55:19,502 INFO 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 17:55:19,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285860348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:19,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:19,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:55:19,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939025103] [2021-07-09 17:55:19,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:19,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:19,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:19,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:19,503 INFO L87 Difference]: Start difference. First operand 4572 states and 20354 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:21,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:21,375 INFO L93 Difference]: Finished difference Result 6118 states and 26556 transitions. [2021-07-09 17:55:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:55:21,376 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:21,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:21,392 INFO L225 Difference]: With dead ends: 6118 [2021-07-09 17:55:21,392 INFO L226 Difference]: Without dead ends: 5951 [2021-07-09 17:55:21,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1494.3ms TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:55:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-07-09 17:55:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 4576. [2021-07-09 17:55:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.4485245901639345) internal successors, (20352), 4575 states have internal predecessors, (20352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 20352 transitions. [2021-07-09 17:55:21,492 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 20352 transitions. Word has length 30 [2021-07-09 17:55:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:21,492 INFO L482 AbstractCegarLoop]: Abstraction has 4576 states and 20352 transitions. [2021-07-09 17:55:21,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 20352 transitions. [2021-07-09 17:55:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:21,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:21,501 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:21,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-07-09 17:55:21,702 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:21,703 INFO L82 PathProgramCache]: Analyzing trace with hash 274105212, now seen corresponding path program 58 times [2021-07-09 17:55:21,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:21,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123502642] [2021-07-09 17:55:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:21,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:21,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123502642] [2021-07-09 17:55:21,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123502642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:21,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951245044] [2021-07-09 17:55:21,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:22,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:22,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:22,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:22,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:22,123 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 17:55:22,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:22,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:22,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:22,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:55:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:22,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951245044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:22,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:22,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:55:22,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633131908] [2021-07-09 17:55:22,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:55:22,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:22,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:55:22,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:55:22,180 INFO L87 Difference]: Start difference. First operand 4576 states and 20352 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:23,681 INFO L93 Difference]: Finished difference Result 6260 states and 26996 transitions. [2021-07-09 17:55:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:55:23,681 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:23,699 INFO L225 Difference]: With dead ends: 6260 [2021-07-09 17:55:23,700 INFO L226 Difference]: Without dead ends: 6100 [2021-07-09 17:55:23,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1149.4ms TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:55:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2021-07-09 17:55:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 4622. [2021-07-09 17:55:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4622 states, 4621 states have (on average 4.449469811729063) internal successors, (20561), 4621 states have internal predecessors, (20561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 20561 transitions. [2021-07-09 17:55:23,806 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 20561 transitions. Word has length 30 [2021-07-09 17:55:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:23,806 INFO L482 AbstractCegarLoop]: Abstraction has 4622 states and 20561 transitions. [2021-07-09 17:55:23,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 20561 transitions. [2021-07-09 17:55:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:23,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:23,816 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:24,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:24,017 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:24,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:24,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1826877156, now seen corresponding path program 59 times [2021-07-09 17:55:24,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:24,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430121577] [2021-07-09 17:55:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:24,259 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 17:55:24,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:24,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430121577] [2021-07-09 17:55:24,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430121577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:24,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858448582] [2021-07-09 17:55:24,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:24,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:55:24,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:24,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:55:24,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:24,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:24,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:24,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:55:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:24,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858448582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:24,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:24,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:55:24,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448328105] [2021-07-09 17:55:24,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:55:24,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:24,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:55:24,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:55:24,469 INFO L87 Difference]: Start difference. First operand 4622 states and 20561 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:26,094 INFO L93 Difference]: Finished difference Result 6525 states and 27927 transitions. [2021-07-09 17:55:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:55:26,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:26,114 INFO L225 Difference]: With dead ends: 6525 [2021-07-09 17:55:26,114 INFO L226 Difference]: Without dead ends: 6213 [2021-07-09 17:55:26,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1247.8ms TimeCoverageRelationStatistics Valid=484, Invalid=2066, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:55:26,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2021-07-09 17:55:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 4650. [2021-07-09 17:55:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 4649 states have (on average 4.4491288449128845) internal successors, (20684), 4649 states have internal predecessors, (20684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 20684 transitions. [2021-07-09 17:55:26,242 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 20684 transitions. Word has length 30 [2021-07-09 17:55:26,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:26,242 INFO L482 AbstractCegarLoop]: Abstraction has 4650 states and 20684 transitions. [2021-07-09 17:55:26,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,243 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 20684 transitions. [2021-07-09 17:55:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:26,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:26,252 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:26,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:26,453 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1892384642, now seen corresponding path program 38 times [2021-07-09 17:55:26,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:26,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331729408] [2021-07-09 17:55:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:26,625 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 17:55:26,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:26,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331729408] [2021-07-09 17:55:26,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331729408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:26,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435300089] [2021-07-09 17:55:26,625 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 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 17:55:26,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:26,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:26,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:55:26,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:26,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:26,799 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 17:55:26,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:26,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:26,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:26,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:55:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:26,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435300089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:26,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:26,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:55:26,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225276651] [2021-07-09 17:55:26,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:26,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:26,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:26,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:26,915 INFO L87 Difference]: Start difference. First operand 4650 states and 20684 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:28,935 INFO L93 Difference]: Finished difference Result 5974 states and 25851 transitions. [2021-07-09 17:55:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:55:28,935 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:28,951 INFO L225 Difference]: With dead ends: 5974 [2021-07-09 17:55:28,951 INFO L226 Difference]: Without dead ends: 5723 [2021-07-09 17:55:28,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1538.4ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:55:28,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2021-07-09 17:55:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 4675. [2021-07-09 17:55:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4675 states, 4674 states have (on average 4.443089430894309) internal successors, (20767), 4674 states have internal predecessors, (20767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 20767 transitions. [2021-07-09 17:55:29,067 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 20767 transitions. Word has length 30 [2021-07-09 17:55:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:29,067 INFO L482 AbstractCegarLoop]: Abstraction has 4675 states and 20767 transitions. [2021-07-09 17:55:29,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 20767 transitions. [2021-07-09 17:55:29,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:29,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:29,077 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:29,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:29,278 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:29,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:29,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1006995578, now seen corresponding path program 39 times [2021-07-09 17:55:29,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:29,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435863170] [2021-07-09 17:55:29,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:29,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:29,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435863170] [2021-07-09 17:55:29,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435863170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:29,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933521800] [2021-07-09 17:55:29,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:55:29,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:55:29,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:55:29,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:29,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:29,623 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 17:55:29,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:29,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:29,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:29,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:55:29,739 INFO 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 17:55:29,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933521800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:29,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:29,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:55:29,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517839148] [2021-07-09 17:55:29,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:29,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:29,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:29,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:29,740 INFO L87 Difference]: Start difference. First operand 4675 states and 20767 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:31,686 INFO L93 Difference]: Finished difference Result 6118 states and 26449 transitions. [2021-07-09 17:55:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:55:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:31,702 INFO L225 Difference]: With dead ends: 6118 [2021-07-09 17:55:31,702 INFO L226 Difference]: Without dead ends: 5827 [2021-07-09 17:55:31,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1502.2ms TimeCoverageRelationStatistics Valid=524, Invalid=2556, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:55:31,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5827 states. [2021-07-09 17:55:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5827 to 4666. [2021-07-09 17:55:31,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4666 states, 4665 states have (on average 4.445230439442658) internal successors, (20737), 4665 states have internal predecessors, (20737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4666 states to 4666 states and 20737 transitions. [2021-07-09 17:55:31,797 INFO L78 Accepts]: Start accepts. Automaton has 4666 states and 20737 transitions. Word has length 30 [2021-07-09 17:55:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:31,797 INFO L482 AbstractCegarLoop]: Abstraction has 4666 states and 20737 transitions. [2021-07-09 17:55:31,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4666 states and 20737 transitions. [2021-07-09 17:55:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:31,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:31,807 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:32,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable465,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:32,010 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:32,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:32,010 INFO L82 PathProgramCache]: Analyzing trace with hash 269792026, now seen corresponding path program 6 times [2021-07-09 17:55:32,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:32,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160256105] [2021-07-09 17:55:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:32,172 INFO 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 17:55:32,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:32,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160256105] [2021-07-09 17:55:32,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160256105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:32,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347439798] [2021-07-09 17:55:32,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:32,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:55:32,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:32,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:32,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:32,328 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 17:55:32,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:32,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:32,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:32,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:55:32,392 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 17:55:32,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347439798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:32,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:32,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:55:32,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455725197] [2021-07-09 17:55:32,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:55:32,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:32,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:55:32,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:55:32,393 INFO L87 Difference]: Start difference. First operand 4666 states and 20737 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:33,772 INFO L93 Difference]: Finished difference Result 6013 states and 26168 transitions. [2021-07-09 17:55:33,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:55:33,772 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:33,788 INFO L225 Difference]: With dead ends: 6013 [2021-07-09 17:55:33,788 INFO L226 Difference]: Without dead ends: 5895 [2021-07-09 17:55:33,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1013.8ms TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:55:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2021-07-09 17:55:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 4701. [2021-07-09 17:55:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4701 states, 4700 states have (on average 4.441063829787234) internal successors, (20873), 4700 states have internal predecessors, (20873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4701 states to 4701 states and 20873 transitions. [2021-07-09 17:55:33,882 INFO L78 Accepts]: Start accepts. Automaton has 4701 states and 20873 transitions. Word has length 30 [2021-07-09 17:55:33,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:33,882 INFO L482 AbstractCegarLoop]: Abstraction has 4701 states and 20873 transitions. [2021-07-09 17:55:33,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4701 states and 20873 transitions. [2021-07-09 17:55:33,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:33,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:33,891 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:34,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-07-09 17:55:34,092 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:34,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:34,092 INFO L82 PathProgramCache]: Analyzing trace with hash -806467874, now seen corresponding path program 7 times [2021-07-09 17:55:34,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:34,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715736641] [2021-07-09 17:55:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:34,246 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 17:55:34,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:34,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715736641] [2021-07-09 17:55:34,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715736641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:34,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433699190] [2021-07-09 17:55:34,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:34,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:34,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:34,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:55:34,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:34,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:34,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:34,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:55:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:34,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433699190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:34,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:34,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:55:34,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126268322] [2021-07-09 17:55:34,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:55:34,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:34,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:55:34,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:55:34,451 INFO L87 Difference]: Start difference. First operand 4701 states and 20873 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:35,778 INFO L93 Difference]: Finished difference Result 5924 states and 25830 transitions. [2021-07-09 17:55:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:55:35,778 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:35,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:35,793 INFO L225 Difference]: With dead ends: 5924 [2021-07-09 17:55:35,793 INFO L226 Difference]: Without dead ends: 5808 [2021-07-09 17:55:35,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1006.1ms TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:55:35,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-07-09 17:55:35,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4694. [2021-07-09 17:55:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 4693 states have (on average 4.441721713189858) internal successors, (20845), 4693 states have internal predecessors, (20845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 20845 transitions. [2021-07-09 17:55:35,884 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 20845 transitions. Word has length 30 [2021-07-09 17:55:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:35,884 INFO L482 AbstractCegarLoop]: Abstraction has 4694 states and 20845 transitions. [2021-07-09 17:55:35,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 20845 transitions. [2021-07-09 17:55:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:35,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:35,893 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:36,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:36,094 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:36,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:36,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1424785500, now seen corresponding path program 34 times [2021-07-09 17:55:36,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:36,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464786731] [2021-07-09 17:55:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:36,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:36,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464786731] [2021-07-09 17:55:36,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464786731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:36,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106340484] [2021-07-09 17:55:36,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:55:36,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:36,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:36,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:36,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:36,404 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 17:55:36,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:36,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:36,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:36,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:55:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:36,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106340484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:36,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:36,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:55:36,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215193799] [2021-07-09 17:55:36,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:55:36,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:36,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:55:36,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:55:36,460 INFO L87 Difference]: Start difference. First operand 4694 states and 20845 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:38,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:38,049 INFO L93 Difference]: Finished difference Result 5795 states and 25319 transitions. [2021-07-09 17:55:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:55:38,050 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:38,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:38,066 INFO L225 Difference]: With dead ends: 5795 [2021-07-09 17:55:38,066 INFO L226 Difference]: Without dead ends: 5697 [2021-07-09 17:55:38,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1119.4ms TimeCoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:55:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2021-07-09 17:55:38,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 4706. [2021-07-09 17:55:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4706 states, 4705 states have (on average 4.4397449521785335) internal successors, (20889), 4705 states have internal predecessors, (20889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4706 states to 4706 states and 20889 transitions. [2021-07-09 17:55:38,164 INFO L78 Accepts]: Start accepts. Automaton has 4706 states and 20889 transitions. Word has length 30 [2021-07-09 17:55:38,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:38,164 INFO L482 AbstractCegarLoop]: Abstraction has 4706 states and 20889 transitions. [2021-07-09 17:55:38,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4706 states and 20889 transitions. [2021-07-09 17:55:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:38,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:38,174 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:38,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:38,375 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:38,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:38,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1344110718, now seen corresponding path program 35 times [2021-07-09 17:55:38,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:38,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687657445] [2021-07-09 17:55:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:38,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:38,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687657445] [2021-07-09 17:55:38,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687657445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:38,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955691461] [2021-07-09 17:55:38,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:38,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:38,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:38,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:38,699 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 17:55:38,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:38,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:38,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:38,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:55:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:38,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955691461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:38,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:38,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:55:38,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851668538] [2021-07-09 17:55:38,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:55:38,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:38,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:55:38,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:55:38,739 INFO L87 Difference]: Start difference. First operand 4706 states and 20889 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:39,923 INFO L93 Difference]: Finished difference Result 5670 states and 24843 transitions. [2021-07-09 17:55:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:55:39,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:39,938 INFO L225 Difference]: With dead ends: 5670 [2021-07-09 17:55:39,938 INFO L226 Difference]: Without dead ends: 5567 [2021-07-09 17:55:39,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 889.6ms TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:55:39,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-07-09 17:55:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4698. [2021-07-09 17:55:40,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4697 states have (on average 4.440706834149457) internal successors, (20858), 4697 states have internal predecessors, (20858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 20858 transitions. [2021-07-09 17:55:40,030 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 20858 transitions. Word has length 30 [2021-07-09 17:55:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:40,030 INFO L482 AbstractCegarLoop]: Abstraction has 4698 states and 20858 transitions. [2021-07-09 17:55:40,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 20858 transitions. [2021-07-09 17:55:40,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:40,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:40,040 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, 1] [2021-07-09 17:55:40,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:40,241 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:40,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:40,241 INFO L82 PathProgramCache]: Analyzing trace with hash 534675360, now seen corresponding path program 36 times [2021-07-09 17:55:40,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:40,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147850949] [2021-07-09 17:55:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:40,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:40,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147850949] [2021-07-09 17:55:40,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147850949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:40,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197663919] [2021-07-09 17:55:40,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:40,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:55:40,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:40,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:55:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:40,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:40,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:40,635 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-09 17:55:40,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:40,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:40,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:40,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-07-09 17:55:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:40,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197663919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:40,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:40,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:55:40,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969062480] [2021-07-09 17:55:40,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:40,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:40,681 INFO L87 Difference]: Start difference. First operand 4698 states and 20858 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:42,823 INFO L93 Difference]: Finished difference Result 6105 states and 26434 transitions. [2021-07-09 17:55:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:55:42,823 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:42,840 INFO L225 Difference]: With dead ends: 6105 [2021-07-09 17:55:42,840 INFO L226 Difference]: Without dead ends: 5998 [2021-07-09 17:55:42,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1496.1ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:55:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5998 states. [2021-07-09 17:55:42,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5998 to 4714. [2021-07-09 17:55:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4714 states, 4713 states have (on average 4.436876723955018) internal successors, (20911), 4713 states have internal predecessors, (20911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 20911 transitions. [2021-07-09 17:55:42,937 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 20911 transitions. Word has length 30 [2021-07-09 17:55:42,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:42,937 INFO L482 AbstractCegarLoop]: Abstraction has 4714 states and 20911 transitions. [2021-07-09 17:55:42,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:42,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 20911 transitions. [2021-07-09 17:55:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:42,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:42,947 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] [2021-07-09 17:55:43,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:43,147 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:43,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1400330812, now seen corresponding path program 8 times [2021-07-09 17:55:43,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:43,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908058114] [2021-07-09 17:55:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:43,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:43,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908058114] [2021-07-09 17:55:43,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908058114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:43,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175434580] [2021-07-09 17:55:43,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:43,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:43,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:43,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:55:43,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:43,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:43,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:55:43,590 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 17:55:43,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:43,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:43,596 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 17:55:43,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-07-09 17:55:43,632 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 17:55:43,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175434580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:43,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:43,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 17:55:43,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430314934] [2021-07-09 17:55:43,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:55:43,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:43,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:55:43,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:55:43,633 INFO L87 Difference]: Start difference. First operand 4714 states and 20911 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:45,730 INFO L93 Difference]: Finished difference Result 6368 states and 27507 transitions. [2021-07-09 17:55:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 17:55:45,731 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:45,747 INFO L225 Difference]: With dead ends: 6368 [2021-07-09 17:55:45,747 INFO L226 Difference]: Without dead ends: 6140 [2021-07-09 17:55:45,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1585.6ms TimeCoverageRelationStatistics Valid=635, Invalid=2905, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:55:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6140 states. [2021-07-09 17:55:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6140 to 4696. [2021-07-09 17:55:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4696 states, 4695 states have (on average 4.440894568690096) internal successors, (20850), 4695 states have internal predecessors, (20850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 20850 transitions. [2021-07-09 17:55:45,842 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 20850 transitions. Word has length 30 [2021-07-09 17:55:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:45,842 INFO L482 AbstractCegarLoop]: Abstraction has 4696 states and 20850 transitions. [2021-07-09 17:55:45,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 20850 transitions. [2021-07-09 17:55:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:45,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:45,851 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:46,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:46,052 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:46,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:46,052 INFO L82 PathProgramCache]: Analyzing trace with hash -373359346, now seen corresponding path program 60 times [2021-07-09 17:55:46,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:46,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882045321] [2021-07-09 17:55:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:46,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:46,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882045321] [2021-07-09 17:55:46,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882045321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:46,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067774610] [2021-07-09 17:55:46,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:46,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:55:46,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:46,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:55:46,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:46,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:46,405 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 17:55:46,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:46,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:46,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:46,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-07-09 17:55:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:46,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067774610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:46,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:46,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:55:46,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514921903] [2021-07-09 17:55:46,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:46,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:46,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:46,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:46,498 INFO L87 Difference]: Start difference. First operand 4696 states and 20850 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:49,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:49,831 INFO L93 Difference]: Finished difference Result 9724 states and 40718 transitions. [2021-07-09 17:55:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 17:55:49,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:49,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:49,895 INFO L225 Difference]: With dead ends: 9724 [2021-07-09 17:55:49,895 INFO L226 Difference]: Without dead ends: 9356 [2021-07-09 17:55:49,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 2285.0ms TimeCoverageRelationStatistics Valid=930, Invalid=5550, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 17:55:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9356 states. [2021-07-09 17:55:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9356 to 4897. [2021-07-09 17:55:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4897 states, 4896 states have (on average 4.464256535947713) internal successors, (21857), 4896 states have internal predecessors, (21857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4897 states to 4897 states and 21857 transitions. [2021-07-09 17:55:50,016 INFO L78 Accepts]: Start accepts. Automaton has 4897 states and 21857 transitions. Word has length 30 [2021-07-09 17:55:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:50,016 INFO L482 AbstractCegarLoop]: Abstraction has 4897 states and 21857 transitions. [2021-07-09 17:55:50,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 4897 states and 21857 transitions. [2021-07-09 17:55:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:50,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:50,026 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:50,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-07-09 17:55:50,226 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:50,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1000486072, now seen corresponding path program 9 times [2021-07-09 17:55:50,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:50,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850836581] [2021-07-09 17:55:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:50,373 INFO 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 17:55:50,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:50,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850836581] [2021-07-09 17:55:50,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850836581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:50,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437253430] [2021-07-09 17:55:50,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:50,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:55:50,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:50,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:55:50,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:50,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:50,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:50,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 56 [2021-07-09 17:55:50,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:55:50,677 INFO L628 ElimStorePlain]: treesize reduction 62, result has 60.0 percent of original size [2021-07-09 17:55:50,694 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 17:55:50,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:296 [2021-07-09 17:55:50,864 INFO 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 17:55:50,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437253430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:50,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:50,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 17:55:50,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414624651] [2021-07-09 17:55:50,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:50,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:50,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:50,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:50,865 INFO L87 Difference]: Start difference. First operand 4897 states and 21857 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:51,838 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-07-09 17:55:53,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:53,222 INFO L93 Difference]: Finished difference Result 7955 states and 34075 transitions. [2021-07-09 17:55:53,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:55:53,222 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:53,244 INFO L225 Difference]: With dead ends: 7955 [2021-07-09 17:55:53,244 INFO L226 Difference]: Without dead ends: 7855 [2021-07-09 17:55:53,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1661.0ms TimeCoverageRelationStatistics Valid=458, Invalid=2512, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:55:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7855 states. [2021-07-09 17:55:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7855 to 4931. [2021-07-09 17:55:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 4930 states have (on average 4.455983772819472) internal successors, (21968), 4930 states have internal predecessors, (21968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 21968 transitions. [2021-07-09 17:55:53,368 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 21968 transitions. Word has length 30 [2021-07-09 17:55:53,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:53,368 INFO L482 AbstractCegarLoop]: Abstraction has 4931 states and 21968 transitions. [2021-07-09 17:55:53,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 21968 transitions. [2021-07-09 17:55:53,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:53,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:53,379 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:53,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-09 17:55:53,579 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1718013794, now seen corresponding path program 10 times [2021-07-09 17:55:53,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:53,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906035612] [2021-07-09 17:55:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:53,768 INFO 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 17:55:53,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:53,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906035612] [2021-07-09 17:55:53,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906035612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:53,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122726491] [2021-07-09 17:55:53,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:53,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:53,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:53,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:53,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:53,965 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 17:55:53,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:53,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:53,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:53,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:55:54,051 INFO 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 17:55:54,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122726491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:54,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:54,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:55:54,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514095437] [2021-07-09 17:55:54,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:55:54,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:54,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:55:54,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:55:54,052 INFO L87 Difference]: Start difference. First operand 4931 states and 21968 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:55,999 INFO L93 Difference]: Finished difference Result 10254 states and 42804 transitions. [2021-07-09 17:55:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 17:55:55,999 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:55,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:56,030 INFO L225 Difference]: With dead ends: 10254 [2021-07-09 17:55:56,030 INFO L226 Difference]: Without dead ends: 9788 [2021-07-09 17:55:56,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1233.1ms TimeCoverageRelationStatistics Valid=655, Invalid=2885, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:55:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9788 states. [2021-07-09 17:55:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9788 to 5071. [2021-07-09 17:55:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 5070 states have (on average 4.461735700197239) internal successors, (22621), 5070 states have internal predecessors, (22621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 22621 transitions. [2021-07-09 17:55:56,205 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 22621 transitions. Word has length 30 [2021-07-09 17:55:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:56,205 INFO L482 AbstractCegarLoop]: Abstraction has 5071 states and 22621 transitions. [2021-07-09 17:55:56,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 22621 transitions. [2021-07-09 17:55:56,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:56,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:56,216 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:56,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:56,416 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:56,417 INFO L82 PathProgramCache]: Analyzing trace with hash -457758120, now seen corresponding path program 61 times [2021-07-09 17:55:56,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:56,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138783442] [2021-07-09 17:55:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:56,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:56,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138783442] [2021-07-09 17:55:56,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138783442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:56,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115466433] [2021-07-09 17:55:56,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:56,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:55:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:56,753 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 17:55:56,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:56,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:56,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:56,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:55:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:56,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115466433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:56,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:56,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:55:56,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787670952] [2021-07-09 17:55:56,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:55:56,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:56,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:55:56,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:55:56,816 INFO L87 Difference]: Start difference. First operand 5071 states and 22621 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:00,210 INFO L93 Difference]: Finished difference Result 11610 states and 48897 transitions. [2021-07-09 17:56:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 17:56:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:00,243 INFO L225 Difference]: With dead ends: 11610 [2021-07-09 17:56:00,243 INFO L226 Difference]: Without dead ends: 11123 [2021-07-09 17:56:00,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 2455.5ms TimeCoverageRelationStatistics Valid=953, Invalid=5053, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 17:56:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11123 states. [2021-07-09 17:56:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11123 to 6185. [2021-07-09 17:56:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6185 states, 6184 states have (on average 4.532179818887451) internal successors, (28027), 6184 states have internal predecessors, (28027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 28027 transitions. [2021-07-09 17:56:00,444 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 28027 transitions. Word has length 30 [2021-07-09 17:56:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:00,444 INFO L482 AbstractCegarLoop]: Abstraction has 6185 states and 28027 transitions. [2021-07-09 17:56:00,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 28027 transitions. [2021-07-09 17:56:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:00,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:00,458 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:00,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:00,659 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:00,659 INFO L82 PathProgramCache]: Analyzing trace with hash 433531888, now seen corresponding path program 62 times [2021-07-09 17:56:00,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:00,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784532944] [2021-07-09 17:56:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:00,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:00,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784532944] [2021-07-09 17:56:00,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784532944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:00,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462155503] [2021-07-09 17:56:00,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:00,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:00,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:00,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:56:00,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:01,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:01,019 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 17:56:01,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:01,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:01,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:01,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:56:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:01,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462155503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:01,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:01,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:56:01,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025370016] [2021-07-09 17:56:01,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:56:01,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:01,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:56:01,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:56:01,141 INFO L87 Difference]: Start difference. First operand 6185 states and 28027 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:05,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:05,192 INFO L93 Difference]: Finished difference Result 11382 states and 48387 transitions. [2021-07-09 17:56:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 17:56:05,192 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:05,221 INFO L225 Difference]: With dead ends: 11382 [2021-07-09 17:56:05,222 INFO L226 Difference]: Without dead ends: 10940 [2021-07-09 17:56:05,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2154 ImplicationChecksByTransitivity, 2962.8ms TimeCoverageRelationStatistics Valid=907, Invalid=5573, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 17:56:05,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10940 states. [2021-07-09 17:56:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10940 to 6670. [2021-07-09 17:56:05,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6670 states, 6669 states have (on average 4.548208127155496) internal successors, (30332), 6669 states have internal predecessors, (30332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 30332 transitions. [2021-07-09 17:56:05,413 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 30332 transitions. Word has length 30 [2021-07-09 17:56:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:05,414 INFO L482 AbstractCegarLoop]: Abstraction has 6670 states and 30332 transitions. [2021-07-09 17:56:05,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 30332 transitions. [2021-07-09 17:56:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:05,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:05,430 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:05,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:05,631 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:05,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1840091556, now seen corresponding path program 11 times [2021-07-09 17:56:05,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:05,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852827509] [2021-07-09 17:56:05,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:05,793 INFO 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 17:56:05,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:05,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852827509] [2021-07-09 17:56:05,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852827509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:05,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516311804] [2021-07-09 17:56:05,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:05,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:56:05,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:05,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:56:05,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:05,948 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 17:56:05,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:05,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:05,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:05,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:56:06,005 INFO 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 17:56:06,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516311804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:06,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:06,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:56:06,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314137590] [2021-07-09 17:56:06,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:56:06,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:06,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:56:06,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:56:06,006 INFO L87 Difference]: Start difference. First operand 6670 states and 30332 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:07,990 INFO L93 Difference]: Finished difference Result 11493 states and 49267 transitions. [2021-07-09 17:56:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 17:56:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:08,023 INFO L225 Difference]: With dead ends: 11493 [2021-07-09 17:56:08,023 INFO L226 Difference]: Without dead ends: 11211 [2021-07-09 17:56:08,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 1244.0ms TimeCoverageRelationStatistics Valid=577, Invalid=2729, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:56:08,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11211 states. [2021-07-09 17:56:08,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11211 to 6865. [2021-07-09 17:56:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6865 states, 6864 states have (on average 4.542540792540793) internal successors, (31180), 6864 states have internal predecessors, (31180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6865 states to 6865 states and 31180 transitions. [2021-07-09 17:56:08,219 INFO L78 Accepts]: Start accepts. Automaton has 6865 states and 31180 transitions. Word has length 30 [2021-07-09 17:56:08,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:08,220 INFO L482 AbstractCegarLoop]: Abstraction has 6865 states and 31180 transitions. [2021-07-09 17:56:08,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6865 states and 31180 transitions. [2021-07-09 17:56:08,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:08,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:08,235 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:08,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:08,436 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:08,436 INFO L82 PathProgramCache]: Analyzing trace with hash 717133904, now seen corresponding path program 12 times [2021-07-09 17:56:08,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:08,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891010800] [2021-07-09 17:56:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:08,587 INFO 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 17:56:08,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:08,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891010800] [2021-07-09 17:56:08,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891010800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:08,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734056747] [2021-07-09 17:56:08,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:08,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:56:08,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:08,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:56:08,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:08,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:08,754 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 17:56:08,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:08,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:08,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:08,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:56:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:08,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734056747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:08,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:08,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:56:08,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438597282] [2021-07-09 17:56:08,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:56:08,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:08,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:56:08,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:56:08,849 INFO L87 Difference]: Start difference. First operand 6865 states and 31180 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:10,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:10,616 INFO L93 Difference]: Finished difference Result 11138 states and 47722 transitions. [2021-07-09 17:56:10,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 17:56:10,617 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:10,647 INFO L225 Difference]: With dead ends: 11138 [2021-07-09 17:56:10,647 INFO L226 Difference]: Without dead ends: 10994 [2021-07-09 17:56:10,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1120.8ms TimeCoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:56:10,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10994 states. [2021-07-09 17:56:10,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10994 to 6918. [2021-07-09 17:56:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6918 states, 6917 states have (on average 4.544455688882463) internal successors, (31434), 6917 states have internal predecessors, (31434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6918 states to 6918 states and 31434 transitions. [2021-07-09 17:56:10,841 INFO L78 Accepts]: Start accepts. Automaton has 6918 states and 31434 transitions. Word has length 30 [2021-07-09 17:56:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:10,841 INFO L482 AbstractCegarLoop]: Abstraction has 6918 states and 31434 transitions. [2021-07-09 17:56:10,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 6918 states and 31434 transitions. [2021-07-09 17:56:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:10,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:10,857 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:11,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-09 17:56:11,058 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash -819317232, now seen corresponding path program 40 times [2021-07-09 17:56:11,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:11,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198443215] [2021-07-09 17:56:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:11,233 INFO 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 17:56:11,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:11,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198443215] [2021-07-09 17:56:11,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198443215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:11,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743543746] [2021-07-09 17:56:11,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:56:11,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:11,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:11,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:56:11,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:11,420 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 17:56:11,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:11,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:11,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:11,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:56:11,457 INFO 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 17:56:11,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743543746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:11,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:11,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:56:11,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020293747] [2021-07-09 17:56:11,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:56:11,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:11,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:56:11,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:56:11,458 INFO L87 Difference]: Start difference. First operand 6918 states and 31434 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:13,834 INFO L93 Difference]: Finished difference Result 11496 states and 49442 transitions. [2021-07-09 17:56:13,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 17:56:13,834 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:13,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:13,865 INFO L225 Difference]: With dead ends: 11496 [2021-07-09 17:56:13,865 INFO L226 Difference]: Without dead ends: 11262 [2021-07-09 17:56:13,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1476.0ms TimeCoverageRelationStatistics Valid=514, Invalid=3146, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 17:56:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11262 states. [2021-07-09 17:56:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11262 to 7310. [2021-07-09 17:56:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7310 states, 7309 states have (on average 4.5419346011766315) internal successors, (33197), 7309 states have internal predecessors, (33197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7310 states to 7310 states and 33197 transitions. [2021-07-09 17:56:14,061 INFO L78 Accepts]: Start accepts. Automaton has 7310 states and 33197 transitions. Word has length 30 [2021-07-09 17:56:14,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:14,062 INFO L482 AbstractCegarLoop]: Abstraction has 7310 states and 33197 transitions. [2021-07-09 17:56:14,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 7310 states and 33197 transitions. [2021-07-09 17:56:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:14,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:14,130 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:14,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-07-09 17:56:14,333 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:14,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:14,333 INFO L82 PathProgramCache]: Analyzing trace with hash -634323574, now seen corresponding path program 37 times [2021-07-09 17:56:14,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:14,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890796297] [2021-07-09 17:56:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:14,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:14,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890796297] [2021-07-09 17:56:14,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890796297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:14,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439644427] [2021-07-09 17:56:14,527 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 17:56:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:56:14,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:14,726 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 17:56:14,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:14,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:14,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:14,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:56:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:14,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439644427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:14,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:14,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:56:14,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416217816] [2021-07-09 17:56:14,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:56:14,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:14,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:56:14,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:56:14,763 INFO L87 Difference]: Start difference. First operand 7310 states and 33197 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:17,597 INFO L93 Difference]: Finished difference Result 12590 states and 53636 transitions. [2021-07-09 17:56:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 17:56:17,597 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:17,635 INFO L225 Difference]: With dead ends: 12590 [2021-07-09 17:56:17,635 INFO L226 Difference]: Without dead ends: 12386 [2021-07-09 17:56:17,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 1622.0ms TimeCoverageRelationStatistics Valid=712, Invalid=4258, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:56:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12386 states. [2021-07-09 17:56:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12386 to 7529. [2021-07-09 17:56:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7529 states, 7528 states have (on average 4.532412327311371) internal successors, (34120), 7528 states have internal predecessors, (34120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:17,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 34120 transitions. [2021-07-09 17:56:17,864 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 34120 transitions. Word has length 30 [2021-07-09 17:56:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:17,864 INFO L482 AbstractCegarLoop]: Abstraction has 7529 states and 34120 transitions. [2021-07-09 17:56:17,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:17,865 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 34120 transitions. [2021-07-09 17:56:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:17,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:17,883 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:18,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-09 17:56:18,083 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:18,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1794458804, now seen corresponding path program 41 times [2021-07-09 17:56:18,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:18,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763175372] [2021-07-09 17:56:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:18,261 INFO 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 17:56:18,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:18,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763175372] [2021-07-09 17:56:18,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763175372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:18,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145423743] [2021-07-09 17:56:18,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:56:18,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:56:18,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:56:18,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:18,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:56:18,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:18,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:18,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:18,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:56:18,480 INFO 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 17:56:18,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145423743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:18,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:18,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:56:18,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943563628] [2021-07-09 17:56:18,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:56:18,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:18,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:56:18,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:56:18,481 INFO L87 Difference]: Start difference. First operand 7529 states and 34120 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:20,972 INFO L93 Difference]: Finished difference Result 11839 states and 50966 transitions. [2021-07-09 17:56:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 17:56:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:21,008 INFO L225 Difference]: With dead ends: 11839 [2021-07-09 17:56:21,008 INFO L226 Difference]: Without dead ends: 11516 [2021-07-09 17:56:21,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 1823.1ms TimeCoverageRelationStatistics Valid=831, Invalid=4281, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 17:56:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11516 states. [2021-07-09 17:56:21,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11516 to 7650. [2021-07-09 17:56:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7650 states, 7649 states have (on average 4.527781409334554) internal successors, (34633), 7649 states have internal predecessors, (34633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7650 states to 7650 states and 34633 transitions. [2021-07-09 17:56:21,253 INFO L78 Accepts]: Start accepts. Automaton has 7650 states and 34633 transitions. Word has length 30 [2021-07-09 17:56:21,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:21,253 INFO L482 AbstractCegarLoop]: Abstraction has 7650 states and 34633 transitions. [2021-07-09 17:56:21,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 7650 states and 34633 transitions. [2021-07-09 17:56:21,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:21,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:21,331 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:21,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:21,532 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:21,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2107985200, now seen corresponding path program 42 times [2021-07-09 17:56:21,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:21,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936874026] [2021-07-09 17:56:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:21,689 INFO 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 17:56:21,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:21,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936874026] [2021-07-09 17:56:21,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936874026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:21,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349282687] [2021-07-09 17:56:21,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:21,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:56:21,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:21,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:56:21,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:21,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:21,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:21,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 17:56:21,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:21,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:21,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:21,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:47 [2021-07-09 17:56:22,012 INFO 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 17:56:22,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349282687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:22,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:22,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:56:22,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82905575] [2021-07-09 17:56:22,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:56:22,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:22,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:56:22,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:56:22,013 INFO L87 Difference]: Start difference. First operand 7650 states and 34633 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:25,786 INFO L93 Difference]: Finished difference Result 10919 states and 47521 transitions. [2021-07-09 17:56:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 17:56:25,786 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:25,815 INFO L225 Difference]: With dead ends: 10919 [2021-07-09 17:56:25,815 INFO L226 Difference]: Without dead ends: 10608 [2021-07-09 17:56:25,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 2858.3ms TimeCoverageRelationStatistics Valid=1141, Invalid=5339, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 17:56:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10608 states. [2021-07-09 17:56:25,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10608 to 7660. [2021-07-09 17:56:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7660 states, 7659 states have (on average 4.527353440396919) internal successors, (34675), 7659 states have internal predecessors, (34675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7660 states to 7660 states and 34675 transitions. [2021-07-09 17:56:26,013 INFO L78 Accepts]: Start accepts. Automaton has 7660 states and 34675 transitions. Word has length 30 [2021-07-09 17:56:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:26,013 INFO L482 AbstractCegarLoop]: Abstraction has 7660 states and 34675 transitions. [2021-07-09 17:56:26,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 7660 states and 34675 transitions. [2021-07-09 17:56:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:26,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:26,031 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, 1] [2021-07-09 17:56:26,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:26,231 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:26,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:26,231 INFO L82 PathProgramCache]: Analyzing trace with hash 72204810, now seen corresponding path program 38 times [2021-07-09 17:56:26,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:26,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023777529] [2021-07-09 17:56:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:26,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:26,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023777529] [2021-07-09 17:56:26,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023777529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:26,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716724099] [2021-07-09 17:56:26,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:26,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:26,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:26,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:56:26,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:26,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:26,597 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 17:56:26,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:26,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:26,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:26,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:56:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:26,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716724099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:26,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:26,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 17:56:26,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346075791] [2021-07-09 17:56:26,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:56:26,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:56:26,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:56:26,696 INFO L87 Difference]: Start difference. First operand 7660 states and 34675 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:29,440 INFO L93 Difference]: Finished difference Result 11728 states and 50591 transitions. [2021-07-09 17:56:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 17:56:29,440 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:29,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:29,474 INFO L225 Difference]: With dead ends: 11728 [2021-07-09 17:56:29,474 INFO L226 Difference]: Without dead ends: 11614 [2021-07-09 17:56:29,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1602.2ms TimeCoverageRelationStatistics Valid=635, Invalid=4767, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 17:56:29,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11614 states. [2021-07-09 17:56:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11614 to 7773. [2021-07-09 17:56:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7773 states, 7772 states have (on average 4.523417395779722) internal successors, (35156), 7772 states have internal predecessors, (35156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7773 states to 7773 states and 35156 transitions. [2021-07-09 17:56:29,698 INFO L78 Accepts]: Start accepts. Automaton has 7773 states and 35156 transitions. Word has length 30 [2021-07-09 17:56:29,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:29,698 INFO L482 AbstractCegarLoop]: Abstraction has 7773 states and 35156 transitions. [2021-07-09 17:56:29,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 7773 states and 35156 transitions. [2021-07-09 17:56:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:29,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:29,715 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:29,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-07-09 17:56:29,917 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:29,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2040832340, now seen corresponding path program 39 times [2021-07-09 17:56:29,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:29,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655432847] [2021-07-09 17:56:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:30,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:30,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655432847] [2021-07-09 17:56:30,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655432847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:30,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423351241] [2021-07-09 17:56:30,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:30,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:56:30,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:56:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:30,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:30,225 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 17:56:30,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:30,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:30,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:30,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:56:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:30,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423351241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:30,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:30,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:56:30,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448041928] [2021-07-09 17:56:30,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:56:30,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:30,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:56:30,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:56:30,345 INFO L87 Difference]: Start difference. First operand 7773 states and 35156 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:34,413 INFO L93 Difference]: Finished difference Result 12371 states and 52833 transitions. [2021-07-09 17:56:34,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 17:56:34,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:34,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:34,447 INFO L225 Difference]: With dead ends: 12371 [2021-07-09 17:56:34,447 INFO L226 Difference]: Without dead ends: 12142 [2021-07-09 17:56:34,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 2557.8ms TimeCoverageRelationStatistics Valid=857, Invalid=6625, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 17:56:34,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12142 states. [2021-07-09 17:56:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12142 to 7834. [2021-07-09 17:56:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7834 states, 7833 states have (on average 4.51946891357079) internal successors, (35401), 7833 states have internal predecessors, (35401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7834 states to 7834 states and 35401 transitions. [2021-07-09 17:56:34,667 INFO L78 Accepts]: Start accepts. Automaton has 7834 states and 35401 transitions. Word has length 30 [2021-07-09 17:56:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:34,667 INFO L482 AbstractCegarLoop]: Abstraction has 7834 states and 35401 transitions. [2021-07-09 17:56:34,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:34,667 INFO L276 IsEmpty]: Start isEmpty. Operand 7834 states and 35401 transitions. [2021-07-09 17:56:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:34,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:34,684 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:34,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:34,885 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:34,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1352757754, now seen corresponding path program 63 times [2021-07-09 17:56:34,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:34,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698735624] [2021-07-09 17:56:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:35,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:35,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698735624] [2021-07-09 17:56:35,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698735624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:35,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630811199] [2021-07-09 17:56:35,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:35,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:56:35,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:35,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:56:35,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:35,226 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 17:56:35,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:35,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:35,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:35,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:56:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:35,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630811199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:35,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:35,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:56:35,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375521997] [2021-07-09 17:56:35,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:56:35,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:35,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:56:35,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:56:35,264 INFO L87 Difference]: Start difference. First operand 7834 states and 35401 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:37,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:37,154 INFO L93 Difference]: Finished difference Result 9870 states and 43449 transitions. [2021-07-09 17:56:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:56:37,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:37,193 INFO L225 Difference]: With dead ends: 9870 [2021-07-09 17:56:37,193 INFO L226 Difference]: Without dead ends: 9588 [2021-07-09 17:56:37,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1213.4ms TimeCoverageRelationStatistics Valid=530, Invalid=2662, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:56:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9588 states. [2021-07-09 17:56:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9588 to 7876. [2021-07-09 17:56:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7876 states, 7875 states have (on average 4.519238095238095) internal successors, (35589), 7875 states have internal predecessors, (35589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7876 states to 7876 states and 35589 transitions. [2021-07-09 17:56:37,481 INFO L78 Accepts]: Start accepts. Automaton has 7876 states and 35589 transitions. Word has length 30 [2021-07-09 17:56:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:37,481 INFO L482 AbstractCegarLoop]: Abstraction has 7876 states and 35589 transitions. [2021-07-09 17:56:37,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 7876 states and 35589 transitions. [2021-07-09 17:56:37,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:37,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:37,502 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:37,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-07-09 17:56:37,725 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:37,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1637470148, now seen corresponding path program 43 times [2021-07-09 17:56:37,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:37,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94310082] [2021-07-09 17:56:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:37,988 INFO 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 17:56:37,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:37,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94310082] [2021-07-09 17:56:37,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94310082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:37,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84582997] [2021-07-09 17:56:37,989 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 17:56:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:38,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:56:38,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:38,250 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 17:56:38,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:38,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:38,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:38,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-09 17:56:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:38,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84582997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:38,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:38,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:56:38,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551023092] [2021-07-09 17:56:38,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:56:38,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:38,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:56:38,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:56:38,301 INFO L87 Difference]: Start difference. First operand 7876 states and 35589 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:38,669 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-07-09 17:56:40,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:40,892 INFO L93 Difference]: Finished difference Result 9297 states and 41271 transitions. [2021-07-09 17:56:40,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:56:40,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:40,917 INFO L225 Difference]: With dead ends: 9297 [2021-07-09 17:56:40,917 INFO L226 Difference]: Without dead ends: 9128 [2021-07-09 17:56:40,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 2106.9ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:56:40,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9128 states. [2021-07-09 17:56:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9128 to 7890. [2021-07-09 17:56:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7890 states, 7889 states have (on average 4.517302573203194) internal successors, (35637), 7889 states have internal predecessors, (35637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:41,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7890 states to 7890 states and 35637 transitions. [2021-07-09 17:56:41,087 INFO L78 Accepts]: Start accepts. Automaton has 7890 states and 35637 transitions. Word has length 30 [2021-07-09 17:56:41,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:41,087 INFO L482 AbstractCegarLoop]: Abstraction has 7890 states and 35637 transitions. [2021-07-09 17:56:41,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:41,087 INFO L276 IsEmpty]: Start isEmpty. Operand 7890 states and 35637 transitions. [2021-07-09 17:56:41,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:41,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:41,104 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] [2021-07-09 17:56:41,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:41,304 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:41,305 INFO L82 PathProgramCache]: Analyzing trace with hash 771262022, now seen corresponding path program 64 times [2021-07-09 17:56:41,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:41,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987384123] [2021-07-09 17:56:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:41,533 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 17:56:41,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:41,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987384123] [2021-07-09 17:56:41,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987384123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:41,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429470125] [2021-07-09 17:56:41,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:41,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:41,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:41,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:56:41,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:41,693 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 17:56:41,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:41,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:41,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:41,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:56:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:41,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429470125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:41,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:41,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:56:41,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219188955] [2021-07-09 17:56:41,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:56:41,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:41,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:56:41,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:56:41,751 INFO L87 Difference]: Start difference. First operand 7890 states and 35637 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:43,492 INFO L93 Difference]: Finished difference Result 9609 states and 42480 transitions. [2021-07-09 17:56:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:56:43,492 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:43,518 INFO L225 Difference]: With dead ends: 9609 [2021-07-09 17:56:43,518 INFO L226 Difference]: Without dead ends: 9455 [2021-07-09 17:56:43,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1414.2ms TimeCoverageRelationStatistics Valid=454, Invalid=2302, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:56:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9455 states. [2021-07-09 17:56:43,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9455 to 7920. [2021-07-09 17:56:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7920 states, 7919 states have (on average 4.5173633034474046) internal successors, (35773), 7919 states have internal predecessors, (35773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7920 states to 7920 states and 35773 transitions. [2021-07-09 17:56:43,732 INFO L78 Accepts]: Start accepts. Automaton has 7920 states and 35773 transitions. Word has length 30 [2021-07-09 17:56:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:43,732 INFO L482 AbstractCegarLoop]: Abstraction has 7920 states and 35773 transitions. [2021-07-09 17:56:43,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 7920 states and 35773 transitions. [2021-07-09 17:56:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:43,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:43,751 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:43,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-09 17:56:43,971 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:43,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:43,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1970933330, now seen corresponding path program 65 times [2021-07-09 17:56:43,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:43,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955662724] [2021-07-09 17:56:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:44,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:44,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955662724] [2021-07-09 17:56:44,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955662724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:44,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434245539] [2021-07-09 17:56:44,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:44,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:56:44,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:44,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:56:44,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:44,304 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 17:56:44,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:44,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:44,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:44,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:56:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:44,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434245539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:44,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:44,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:56:44,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178682414] [2021-07-09 17:56:44,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:56:44,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:44,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:56:44,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:56:44,362 INFO L87 Difference]: Start difference. First operand 7920 states and 35773 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:46,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:46,219 INFO L93 Difference]: Finished difference Result 9850 states and 43308 transitions. [2021-07-09 17:56:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 17:56:46,219 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:46,246 INFO L225 Difference]: With dead ends: 9850 [2021-07-09 17:56:46,246 INFO L226 Difference]: Without dead ends: 9556 [2021-07-09 17:56:46,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1473.1ms TimeCoverageRelationStatistics Valid=584, Invalid=2722, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:56:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2021-07-09 17:56:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 7970. [2021-07-09 17:56:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7970 states, 7969 states have (on average 4.516375956832727) internal successors, (35991), 7969 states have internal predecessors, (35991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7970 states to 7970 states and 35991 transitions. [2021-07-09 17:56:46,430 INFO L78 Accepts]: Start accepts. Automaton has 7970 states and 35991 transitions. Word has length 30 [2021-07-09 17:56:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:46,430 INFO L482 AbstractCegarLoop]: Abstraction has 7970 states and 35991 transitions. [2021-07-09 17:56:46,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:46,430 INFO L276 IsEmpty]: Start isEmpty. Operand 7970 states and 35991 transitions. [2021-07-09 17:56:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:46,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:46,455 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:46,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:46,669 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:46,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:46,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1395227832, now seen corresponding path program 44 times [2021-07-09 17:56:46,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:46,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777217009] [2021-07-09 17:56:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:46,862 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 17:56:46,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:46,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777217009] [2021-07-09 17:56:46,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777217009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:46,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949496586] [2021-07-09 17:56:46,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:46,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:46,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:46,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:56:46,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:47,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:47,048 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 17:56:47,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:47,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:47,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:47,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:56:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:47,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949496586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:47,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:47,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:56:47,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125071506] [2021-07-09 17:56:47,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:56:47,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:56:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:56:47,163 INFO L87 Difference]: Start difference. First operand 7970 states and 35991 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:49,549 INFO L93 Difference]: Finished difference Result 9263 states and 40965 transitions. [2021-07-09 17:56:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:56:49,550 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:49,577 INFO L225 Difference]: With dead ends: 9263 [2021-07-09 17:56:49,577 INFO L226 Difference]: Without dead ends: 9012 [2021-07-09 17:56:49,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1862.0ms TimeCoverageRelationStatistics Valid=482, Invalid=2940, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:56:49,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2021-07-09 17:56:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 7984. [2021-07-09 17:56:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7983 states have (on average 4.5145935112113245) internal successors, (36040), 7983 states have internal predecessors, (36040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 36040 transitions. [2021-07-09 17:56:49,760 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 36040 transitions. Word has length 30 [2021-07-09 17:56:49,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:49,760 INFO L482 AbstractCegarLoop]: Abstraction has 7984 states and 36040 transitions. [2021-07-09 17:56:49,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:49,760 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 36040 transitions. [2021-07-09 17:56:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:49,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:49,776 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:49,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-09 17:56:49,977 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:49,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:49,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1504152388, now seen corresponding path program 45 times [2021-07-09 17:56:49,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:49,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15260019] [2021-07-09 17:56:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:50,179 INFO 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 17:56:50,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:50,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15260019] [2021-07-09 17:56:50,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15260019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:50,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431802252] [2021-07-09 17:56:50,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:50,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:56:50,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:50,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:56:50,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:50,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:50,364 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 21 treesize of output 29 [2021-07-09 17:56:50,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:50,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:50,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:50,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:56:50,479 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 17:56:50,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431802252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:50,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:50,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:56:50,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797021758] [2021-07-09 17:56:50,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:56:50,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:50,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:56:50,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:56:50,480 INFO L87 Difference]: Start difference. First operand 7984 states and 36040 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:52,748 INFO L93 Difference]: Finished difference Result 9395 states and 41514 transitions. [2021-07-09 17:56:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:56:52,748 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:52,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:52,774 INFO L225 Difference]: With dead ends: 9395 [2021-07-09 17:56:52,774 INFO L226 Difference]: Without dead ends: 9104 [2021-07-09 17:56:52,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1833.0ms TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:56:52,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9104 states. [2021-07-09 17:56:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9104 to 7972. [2021-07-09 17:56:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7972 states, 7971 states have (on average 4.51624639317526) internal successors, (35999), 7971 states have internal predecessors, (35999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7972 states to 7972 states and 35999 transitions. [2021-07-09 17:56:52,956 INFO L78 Accepts]: Start accepts. Automaton has 7972 states and 35999 transitions. Word has length 30 [2021-07-09 17:56:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:52,956 INFO L482 AbstractCegarLoop]: Abstraction has 7972 states and 35999 transitions. [2021-07-09 17:56:52,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:52,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7972 states and 35999 transitions. [2021-07-09 17:56:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:53,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:53,034 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:53,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:53,235 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:53,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1111003758, now seen corresponding path program 66 times [2021-07-09 17:56:53,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:53,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70671848] [2021-07-09 17:56:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:53,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:53,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70671848] [2021-07-09 17:56:53,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70671848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:53,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664832613] [2021-07-09 17:56:53,436 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 17:56:53,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:56:53,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:53,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:56:53,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:53,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:53,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:53,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:53,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-07-09 17:56:53,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:53,743 INFO L628 ElimStorePlain]: treesize reduction 16, result has 67.3 percent of original size [2021-07-09 17:56:53,746 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 17:56:53,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:27 [2021-07-09 17:56:53,836 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 17:56:53,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664832613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:53,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:53,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:56:53,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526802440] [2021-07-09 17:56:53,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:56:53,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:56:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:56:53,837 INFO L87 Difference]: Start difference. First operand 7972 states and 35999 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:56,895 INFO L93 Difference]: Finished difference Result 10521 states and 45798 transitions. [2021-07-09 17:56:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 17:56:56,895 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:56:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:56,925 INFO L225 Difference]: With dead ends: 10521 [2021-07-09 17:56:56,926 INFO L226 Difference]: Without dead ends: 10162 [2021-07-09 17:56:56,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 2205.7ms TimeCoverageRelationStatistics Valid=655, Invalid=4037, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 17:56:56,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10162 states. [2021-07-09 17:56:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10162 to 8010. [2021-07-09 17:56:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8010 states, 8009 states have (on average 4.514795854663504) internal successors, (36159), 8009 states have internal predecessors, (36159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8010 states to 8010 states and 36159 transitions. [2021-07-09 17:56:57,123 INFO L78 Accepts]: Start accepts. Automaton has 8010 states and 36159 transitions. Word has length 30 [2021-07-09 17:56:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:57,123 INFO L482 AbstractCegarLoop]: Abstraction has 8010 states and 36159 transitions. [2021-07-09 17:56:57,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 8010 states and 36159 transitions. [2021-07-09 17:56:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:56:57,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:57,139 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:57,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-07-09 17:56:57,340 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:57,340 INFO L82 PathProgramCache]: Analyzing trace with hash 193735636, now seen corresponding path program 46 times [2021-07-09 17:56:57,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:57,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491534072] [2021-07-09 17:56:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:57,534 INFO 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 17:56:57,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:57,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491534072] [2021-07-09 17:56:57,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491534072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:57,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246769041] [2021-07-09 17:56:57,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:57,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:57,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:57,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:56:57,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:57,737 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 17:56:57,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:57,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:57,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:57,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-09 17:56:57,778 INFO 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 17:56:57,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246769041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:57,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:57,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:56:57,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270543212] [2021-07-09 17:56:57,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:56:57,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:57,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:56:57,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:56:57,779 INFO L87 Difference]: Start difference. First operand 8010 states and 36159 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:00,526 INFO L93 Difference]: Finished difference Result 9642 states and 42627 transitions. [2021-07-09 17:57:00,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 17:57:00,526 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:00,556 INFO L225 Difference]: With dead ends: 9642 [2021-07-09 17:57:00,556 INFO L226 Difference]: Without dead ends: 9477 [2021-07-09 17:57:00,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1960.2ms TimeCoverageRelationStatistics Valid=506, Invalid=3034, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:57:00,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-07-09 17:57:00,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 8066. [2021-07-09 17:57:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8066 states, 8065 states have (on average 4.5052696838189705) internal successors, (36335), 8065 states have internal predecessors, (36335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8066 states to 8066 states and 36335 transitions. [2021-07-09 17:57:00,789 INFO L78 Accepts]: Start accepts. Automaton has 8066 states and 36335 transitions. Word has length 30 [2021-07-09 17:57:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:00,789 INFO L482 AbstractCegarLoop]: Abstraction has 8066 states and 36335 transitions. [2021-07-09 17:57:00,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:00,789 INFO L276 IsEmpty]: Start isEmpty. Operand 8066 states and 36335 transitions. [2021-07-09 17:57:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:00,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:00,806 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:01,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:01,009 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:01,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:01,009 INFO L82 PathProgramCache]: Analyzing trace with hash -264609798, now seen corresponding path program 47 times [2021-07-09 17:57:01,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:01,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111330119] [2021-07-09 17:57:01,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:01,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:01,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111330119] [2021-07-09 17:57:01,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111330119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:01,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320030920] [2021-07-09 17:57:01,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:01,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:57:01,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:01,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:57:01,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:01,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:57:01,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:01,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:01,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:01,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-09 17:57:01,463 INFO 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 17:57:01,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320030920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:01,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:01,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:57:01,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635521647] [2021-07-09 17:57:01,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:57:01,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:01,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:57:01,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:57:01,464 INFO L87 Difference]: Start difference. First operand 8066 states and 36335 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:03,788 INFO L93 Difference]: Finished difference Result 9503 states and 42116 transitions. [2021-07-09 17:57:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:57:03,789 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:03,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:03,813 INFO L225 Difference]: With dead ends: 9503 [2021-07-09 17:57:03,813 INFO L226 Difference]: Without dead ends: 9370 [2021-07-09 17:57:03,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1745.6ms TimeCoverageRelationStatistics Valid=475, Invalid=2387, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:57:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9370 states. [2021-07-09 17:57:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9370 to 8076. [2021-07-09 17:57:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8076 states, 8075 states have (on average 4.503405572755418) internal successors, (36365), 8075 states have internal predecessors, (36365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8076 states to 8076 states and 36365 transitions. [2021-07-09 17:57:03,992 INFO L78 Accepts]: Start accepts. Automaton has 8076 states and 36365 transitions. Word has length 30 [2021-07-09 17:57:03,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:03,992 INFO L482 AbstractCegarLoop]: Abstraction has 8076 states and 36365 transitions. [2021-07-09 17:57:03,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand 8076 states and 36365 transitions. [2021-07-09 17:57:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:04,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:04,012 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] [2021-07-09 17:57:04,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:04,213 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:04,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:04,213 INFO L82 PathProgramCache]: Analyzing trace with hash -770956064, now seen corresponding path program 48 times [2021-07-09 17:57:04,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:04,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416987956] [2021-07-09 17:57:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:04,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:04,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416987956] [2021-07-09 17:57:04,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416987956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:04,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458286159] [2021-07-09 17:57:04,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:04,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:57:04,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:04,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:57:04,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:04,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:04,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:04,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:04,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:04,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-07-09 17:57:04,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:57:04,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:04,651 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 17:57:04,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:24 [2021-07-09 17:57:04,754 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 17:57:04,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458286159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:04,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:04,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:57:04,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628358039] [2021-07-09 17:57:04,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:57:04,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:04,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:57:04,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:57:04,755 INFO L87 Difference]: Start difference. First operand 8076 states and 36365 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:07,212 INFO L93 Difference]: Finished difference Result 9490 states and 41806 transitions. [2021-07-09 17:57:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:57:07,212 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:07,240 INFO L225 Difference]: With dead ends: 9490 [2021-07-09 17:57:07,240 INFO L226 Difference]: Without dead ends: 9266 [2021-07-09 17:57:07,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1679.4ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:57:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9266 states. [2021-07-09 17:57:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9266 to 8062. [2021-07-09 17:57:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8062 states, 8061 states have (on average 4.506512839598065) internal successors, (36327), 8061 states have internal predecessors, (36327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8062 states to 8062 states and 36327 transitions. [2021-07-09 17:57:07,432 INFO L78 Accepts]: Start accepts. Automaton has 8062 states and 36327 transitions. Word has length 30 [2021-07-09 17:57:07,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:07,432 INFO L482 AbstractCegarLoop]: Abstraction has 8062 states and 36327 transitions. [2021-07-09 17:57:07,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 8062 states and 36327 transitions. [2021-07-09 17:57:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:07,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:07,449 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:07,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-07-09 17:57:07,649 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:07,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:07,650 INFO L82 PathProgramCache]: Analyzing trace with hash 173899368, now seen corresponding path program 49 times [2021-07-09 17:57:07,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:07,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957072719] [2021-07-09 17:57:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:07,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:07,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957072719] [2021-07-09 17:57:07,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957072719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:07,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794283739] [2021-07-09 17:57:07,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:57:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:08,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:57:08,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:08,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:08,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:08,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:57:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:08,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794283739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:08,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:08,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:57:08,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266058482] [2021-07-09 17:57:08,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:57:08,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:57:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:57:08,136 INFO L87 Difference]: Start difference. First operand 8062 states and 36327 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:10,343 INFO L93 Difference]: Finished difference Result 9309 states and 41358 transitions. [2021-07-09 17:57:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:57:10,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:10,370 INFO L225 Difference]: With dead ends: 9309 [2021-07-09 17:57:10,370 INFO L226 Difference]: Without dead ends: 9195 [2021-07-09 17:57:10,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1703.2ms TimeCoverageRelationStatistics Valid=464, Invalid=2506, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:57:10,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9195 states. [2021-07-09 17:57:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9195 to 8076. [2021-07-09 17:57:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8076 states, 8075 states have (on average 4.505758513931888) internal successors, (36384), 8075 states have internal predecessors, (36384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8076 states to 8076 states and 36384 transitions. [2021-07-09 17:57:10,575 INFO L78 Accepts]: Start accepts. Automaton has 8076 states and 36384 transitions. Word has length 30 [2021-07-09 17:57:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:10,575 INFO L482 AbstractCegarLoop]: Abstraction has 8076 states and 36384 transitions. [2021-07-09 17:57:10,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 8076 states and 36384 transitions. [2021-07-09 17:57:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:10,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:10,595 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:10,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-07-09 17:57:10,818 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:10,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:10,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1221687708, now seen corresponding path program 50 times [2021-07-09 17:57:10,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:10,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35456654] [2021-07-09 17:57:10,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:11,003 INFO 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 17:57:11,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:11,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35456654] [2021-07-09 17:57:11,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35456654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:11,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21590017] [2021-07-09 17:57:11,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:57:11,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:11,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:11,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:57:11,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:11,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:11,169 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 17:57:11,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:11,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:11,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:11,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:57:11,316 INFO 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 17:57:11,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21590017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:11,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:11,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:57:11,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308721597] [2021-07-09 17:57:11,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:57:11,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:11,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:57:11,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:57:11,317 INFO L87 Difference]: Start difference. First operand 8076 states and 36384 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:13,877 INFO L93 Difference]: Finished difference Result 9480 states and 41834 transitions. [2021-07-09 17:57:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 17:57:13,878 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:13,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:13,904 INFO L225 Difference]: With dead ends: 9480 [2021-07-09 17:57:13,904 INFO L226 Difference]: Without dead ends: 9184 [2021-07-09 17:57:13,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1927.2ms TimeCoverageRelationStatistics Valid=555, Invalid=2985, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:57:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9184 states. [2021-07-09 17:57:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9184 to 8079. [2021-07-09 17:57:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8079 states, 8078 states have (on average 4.504951720722951) internal successors, (36391), 8078 states have internal predecessors, (36391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8079 states to 8079 states and 36391 transitions. [2021-07-09 17:57:14,088 INFO L78 Accepts]: Start accepts. Automaton has 8079 states and 36391 transitions. Word has length 30 [2021-07-09 17:57:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:14,088 INFO L482 AbstractCegarLoop]: Abstraction has 8079 states and 36391 transitions. [2021-07-09 17:57:14,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:14,088 INFO L276 IsEmpty]: Start isEmpty. Operand 8079 states and 36391 transitions. [2021-07-09 17:57:14,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:14,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:14,105 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:14,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-09 17:57:14,306 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:14,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:14,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1585391294, now seen corresponding path program 51 times [2021-07-09 17:57:14,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:14,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142551968] [2021-07-09 17:57:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:14,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:14,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142551968] [2021-07-09 17:57:14,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142551968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:14,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714588649] [2021-07-09 17:57:14,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:14,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:57:14,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:14,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:57:14,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:14,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:14,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 17:57:14,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:14,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:14,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:14,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:57:14,809 INFO 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 17:57:14,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714588649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:14,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:14,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:57:14,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941522822] [2021-07-09 17:57:14,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:57:14,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:14,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:57:14,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:57:14,811 INFO L87 Difference]: Start difference. First operand 8079 states and 36391 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:17,533 INFO L93 Difference]: Finished difference Result 9396 states and 41461 transitions. [2021-07-09 17:57:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 17:57:17,533 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:17,559 INFO L225 Difference]: With dead ends: 9396 [2021-07-09 17:57:17,560 INFO L226 Difference]: Without dead ends: 9148 [2021-07-09 17:57:17,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1900.0ms TimeCoverageRelationStatistics Valid=512, Invalid=3148, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 17:57:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9148 states. [2021-07-09 17:57:17,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9148 to 8090. [2021-07-09 17:57:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8090 states, 8089 states have (on average 4.503523303251329) internal successors, (36429), 8089 states have internal predecessors, (36429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8090 states to 8090 states and 36429 transitions. [2021-07-09 17:57:17,793 INFO L78 Accepts]: Start accepts. Automaton has 8090 states and 36429 transitions. Word has length 30 [2021-07-09 17:57:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:17,793 INFO L482 AbstractCegarLoop]: Abstraction has 8090 states and 36429 transitions. [2021-07-09 17:57:17,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:17,793 INFO L276 IsEmpty]: Start isEmpty. Operand 8090 states and 36429 transitions. [2021-07-09 17:57:17,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:17,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:17,813 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:18,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-07-09 17:57:18,025 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2118148276, now seen corresponding path program 52 times [2021-07-09 17:57:18,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:18,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002070004] [2021-07-09 17:57:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:18,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:18,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002070004] [2021-07-09 17:57:18,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002070004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:18,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622620576] [2021-07-09 17:57:18,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:18,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:18,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:18,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:57:18,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:18,328 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 17:57:18,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:18,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:18,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:18,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:57:18,403 INFO 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 17:57:18,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622620576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:18,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:18,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:57:18,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839047354] [2021-07-09 17:57:18,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:57:18,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:18,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:57:18,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:57:18,404 INFO L87 Difference]: Start difference. First operand 8090 states and 36429 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:20,459 INFO L93 Difference]: Finished difference Result 9335 states and 41409 transitions. [2021-07-09 17:57:20,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 17:57:20,461 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:20,489 INFO L225 Difference]: With dead ends: 9335 [2021-07-09 17:57:20,489 INFO L226 Difference]: Without dead ends: 9224 [2021-07-09 17:57:20,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1476.1ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:57:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9224 states. [2021-07-09 17:57:20,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9224 to 8112. [2021-07-09 17:57:20,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8112 states, 8111 states have (on average 4.501294538281346) internal successors, (36510), 8111 states have internal predecessors, (36510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 36510 transitions. [2021-07-09 17:57:20,680 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 36510 transitions. Word has length 30 [2021-07-09 17:57:20,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:20,680 INFO L482 AbstractCegarLoop]: Abstraction has 8112 states and 36510 transitions. [2021-07-09 17:57:20,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:20,680 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 36510 transitions. [2021-07-09 17:57:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:20,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:20,697 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:20,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:20,899 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:20,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:20,899 INFO L82 PathProgramCache]: Analyzing trace with hash 331084236, now seen corresponding path program 53 times [2021-07-09 17:57:20,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:20,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070330171] [2021-07-09 17:57:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:21,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070330171] [2021-07-09 17:57:21,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070330171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844035397] [2021-07-09 17:57:21,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:21,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:57:21,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:21,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:57:21,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:21,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:21,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:21,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:57:21,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:21,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:21,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:21,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:236 [2021-07-09 17:57:21,470 INFO 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 17:57:21,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844035397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:21,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:21,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:57:21,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447502947] [2021-07-09 17:57:21,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:57:21,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:21,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:57:21,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:57:21,471 INFO L87 Difference]: Start difference. First operand 8112 states and 36510 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:23,369 INFO L93 Difference]: Finished difference Result 9371 states and 41381 transitions. [2021-07-09 17:57:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:57:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:23,395 INFO L225 Difference]: With dead ends: 9371 [2021-07-09 17:57:23,396 INFO L226 Difference]: Without dead ends: 9130 [2021-07-09 17:57:23,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1470.6ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:57:23,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9130 states. [2021-07-09 17:57:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9130 to 8112. [2021-07-09 17:57:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8112 states, 8111 states have (on average 4.501294538281346) internal successors, (36510), 8111 states have internal predecessors, (36510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 36510 transitions. [2021-07-09 17:57:23,583 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 36510 transitions. Word has length 30 [2021-07-09 17:57:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:23,583 INFO L482 AbstractCegarLoop]: Abstraction has 8112 states and 36510 transitions. [2021-07-09 17:57:23,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:23,584 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 36510 transitions. [2021-07-09 17:57:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:23,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:23,600 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:23,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-07-09 17:57:23,801 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:23,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:23,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2075448242, now seen corresponding path program 54 times [2021-07-09 17:57:23,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:23,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20462278] [2021-07-09 17:57:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:23,949 INFO 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 17:57:23,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:23,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20462278] [2021-07-09 17:57:23,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20462278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:23,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809720610] [2021-07-09 17:57:23,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:23,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:57:23,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:23,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:57:23,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:24,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:24,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:24,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 17:57:24,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:24,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:24,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:24,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-07-09 17:57:24,317 INFO 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 17:57:24,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809720610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:24,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:24,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:57:24,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838164800] [2021-07-09 17:57:24,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:57:24,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:24,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:57:24,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:57:24,318 INFO L87 Difference]: Start difference. First operand 8112 states and 36510 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:24,851 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-07-09 17:57:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:26,841 INFO L93 Difference]: Finished difference Result 9602 states and 42307 transitions. [2021-07-09 17:57:26,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:57:26,841 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:26,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:26,867 INFO L225 Difference]: With dead ends: 9602 [2021-07-09 17:57:26,867 INFO L226 Difference]: Without dead ends: 9392 [2021-07-09 17:57:26,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1899.7ms TimeCoverageRelationStatistics Valid=597, Invalid=2595, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:57:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9392 states. [2021-07-09 17:57:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9392 to 8109. [2021-07-09 17:57:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8109 states, 8108 states have (on average 4.5022200296003945) internal successors, (36504), 8108 states have internal predecessors, (36504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8109 states to 8109 states and 36504 transitions. [2021-07-09 17:57:27,127 INFO L78 Accepts]: Start accepts. Automaton has 8109 states and 36504 transitions. Word has length 30 [2021-07-09 17:57:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:27,127 INFO L482 AbstractCegarLoop]: Abstraction has 8109 states and 36504 transitions. [2021-07-09 17:57:27,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:27,127 INFO L276 IsEmpty]: Start isEmpty. Operand 8109 states and 36504 transitions. [2021-07-09 17:57:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:27,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:27,144 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:27,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:27,345 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:27,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2073891774, now seen corresponding path program 13 times [2021-07-09 17:57:27,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:27,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119512740] [2021-07-09 17:57:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:27,500 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 17:57:27,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:27,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119512740] [2021-07-09 17:57:27,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119512740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:27,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41537251] [2021-07-09 17:57:27,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:27,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:57:27,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:27,669 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 17:57:27,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:27,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:27,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:27,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:57:27,724 INFO 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 17:57:27,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41537251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:27,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:27,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:57:27,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145092253] [2021-07-09 17:57:27,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:57:27,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:27,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:57:27,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:57:27,725 INFO L87 Difference]: Start difference. First operand 8109 states and 36504 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:29,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:29,663 INFO L93 Difference]: Finished difference Result 9471 states and 41952 transitions. [2021-07-09 17:57:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:57:29,663 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:29,691 INFO L225 Difference]: With dead ends: 9471 [2021-07-09 17:57:29,691 INFO L226 Difference]: Without dead ends: 9353 [2021-07-09 17:57:29,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1429.1ms TimeCoverageRelationStatistics Valid=488, Invalid=2482, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:57:29,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9353 states. [2021-07-09 17:57:29,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9353 to 8145. [2021-07-09 17:57:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8145 states, 8144 states have (on average 4.5012278978389) internal successors, (36658), 8144 states have internal predecessors, (36658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8145 states to 8145 states and 36658 transitions. [2021-07-09 17:57:29,881 INFO L78 Accepts]: Start accepts. Automaton has 8145 states and 36658 transitions. Word has length 30 [2021-07-09 17:57:29,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:29,881 INFO L482 AbstractCegarLoop]: Abstraction has 8145 states and 36658 transitions. [2021-07-09 17:57:29,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 8145 states and 36658 transitions. [2021-07-09 17:57:29,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:29,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:29,897 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:30,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-07-09 17:57:30,098 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:30,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:30,098 INFO L82 PathProgramCache]: Analyzing trace with hash 997631874, now seen corresponding path program 14 times [2021-07-09 17:57:30,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:30,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035549700] [2021-07-09 17:57:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:30,246 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 17:57:30,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:30,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035549700] [2021-07-09 17:57:30,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035549700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:30,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807263941] [2021-07-09 17:57:30,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:30,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:30,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:30,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:57:30,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:30,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:30,433 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 17:57:30,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:30,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:30,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:30,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:57:30,557 INFO 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 17:57:30,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807263941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:30,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:30,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:57:30,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630271639] [2021-07-09 17:57:30,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:57:30,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:30,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:57:30,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:57:30,558 INFO L87 Difference]: Start difference. First operand 8145 states and 36658 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:32,105 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2021-07-09 17:57:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:33,887 INFO L93 Difference]: Finished difference Result 9577 states and 42300 transitions. [2021-07-09 17:57:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 17:57:33,887 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:33,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:33,912 INFO L225 Difference]: With dead ends: 9577 [2021-07-09 17:57:33,912 INFO L226 Difference]: Without dead ends: 9367 [2021-07-09 17:57:33,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 2565.5ms TimeCoverageRelationStatistics Valid=701, Invalid=4999, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 17:57:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9367 states. [2021-07-09 17:57:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9367 to 8133. [2021-07-09 17:57:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8133 states, 8132 states have (on average 4.50122970978849) internal successors, (36604), 8132 states have internal predecessors, (36604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8133 states to 8133 states and 36604 transitions. [2021-07-09 17:57:34,089 INFO L78 Accepts]: Start accepts. Automaton has 8133 states and 36604 transitions. Word has length 30 [2021-07-09 17:57:34,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:34,089 INFO L482 AbstractCegarLoop]: Abstraction has 8133 states and 36604 transitions. [2021-07-09 17:57:34,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:34,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8133 states and 36604 transitions. [2021-07-09 17:57:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:34,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:34,105 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:34,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-07-09 17:57:34,306 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:34,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1066082048, now seen corresponding path program 40 times [2021-07-09 17:57:34,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:34,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085411947] [2021-07-09 17:57:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:34,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:34,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085411947] [2021-07-09 17:57:34,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085411947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:34,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245898738] [2021-07-09 17:57:34,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:34,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:34,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:57:34,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:34,665 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 17:57:34,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:34,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:34,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:34,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:57:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:34,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245898738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:34,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:34,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:57:34,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335579037] [2021-07-09 17:57:34,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:57:34,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:34,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:57:34,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:57:34,725 INFO L87 Difference]: Start difference. First operand 8133 states and 36604 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:37,230 INFO L93 Difference]: Finished difference Result 9201 states and 40906 transitions. [2021-07-09 17:57:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:57:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:37,259 INFO L225 Difference]: With dead ends: 9201 [2021-07-09 17:57:37,259 INFO L226 Difference]: Without dead ends: 9103 [2021-07-09 17:57:37,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1868.4ms TimeCoverageRelationStatistics Valid=497, Invalid=2583, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:57:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9103 states. [2021-07-09 17:57:37,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9103 to 8139. [2021-07-09 17:57:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8139 states, 8138 states have (on average 4.5011059228311625) internal successors, (36630), 8138 states have internal predecessors, (36630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8139 states to 8139 states and 36630 transitions. [2021-07-09 17:57:37,454 INFO L78 Accepts]: Start accepts. Automaton has 8139 states and 36630 transitions. Word has length 30 [2021-07-09 17:57:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:37,454 INFO L482 AbstractCegarLoop]: Abstraction has 8139 states and 36630 transitions. [2021-07-09 17:57:37,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:37,454 INFO L276 IsEmpty]: Start isEmpty. Operand 8139 states and 36630 transitions. [2021-07-09 17:57:37,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:37,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:37,470 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:37,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-07-09 17:57:37,671 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:37,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:37,671 INFO L82 PathProgramCache]: Analyzing trace with hash 459989030, now seen corresponding path program 41 times [2021-07-09 17:57:37,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:37,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947046569] [2021-07-09 17:57:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:37,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:37,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947046569] [2021-07-09 17:57:37,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947046569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:37,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33504014] [2021-07-09 17:57:37,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:37,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:37,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:37,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:57:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:38,064 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 17:57:38,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:38,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:38,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:38,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:57:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:38,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33504014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:38,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:38,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:57:38,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335142898] [2021-07-09 17:57:38,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:57:38,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:57:38,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:57:38,105 INFO L87 Difference]: Start difference. First operand 8139 states and 36630 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:40,044 INFO L93 Difference]: Finished difference Result 9099 states and 40534 transitions. [2021-07-09 17:57:40,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:57:40,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:40,069 INFO L225 Difference]: With dead ends: 9099 [2021-07-09 17:57:40,069 INFO L226 Difference]: Without dead ends: 8996 [2021-07-09 17:57:40,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1515.0ms TimeCoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:57:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8996 states. [2021-07-09 17:57:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8996 to 8133. [2021-07-09 17:57:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8133 states, 8132 states have (on average 4.500983767830792) internal successors, (36602), 8132 states have internal predecessors, (36602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8133 states to 8133 states and 36602 transitions. [2021-07-09 17:57:40,249 INFO L78 Accepts]: Start accepts. Automaton has 8133 states and 36602 transitions. Word has length 30 [2021-07-09 17:57:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:40,249 INFO L482 AbstractCegarLoop]: Abstraction has 8133 states and 36602 transitions. [2021-07-09 17:57:40,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 8133 states and 36602 transitions. [2021-07-09 17:57:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:40,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:40,266 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:40,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-07-09 17:57:40,466 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:40,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:40,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1956192188, now seen corresponding path program 42 times [2021-07-09 17:57:40,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:40,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826261348] [2021-07-09 17:57:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:40,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:40,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826261348] [2021-07-09 17:57:40,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826261348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:40,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906760208] [2021-07-09 17:57:40,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:40,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:57:40,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:40,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:57:40,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:40,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:40,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:40,929 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 17:57:40,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:40,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:40,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:40,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-07-09 17:57:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:40,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906760208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:40,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:40,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:57:40,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992027574] [2021-07-09 17:57:40,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:57:40,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:40,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:57:40,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:57:40,983 INFO L87 Difference]: Start difference. First operand 8133 states and 36602 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:43,180 INFO L93 Difference]: Finished difference Result 9378 states and 41591 transitions. [2021-07-09 17:57:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:57:43,181 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:43,207 INFO L225 Difference]: With dead ends: 9378 [2021-07-09 17:57:43,207 INFO L226 Difference]: Without dead ends: 9271 [2021-07-09 17:57:43,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1665.3ms TimeCoverageRelationStatistics Valid=494, Invalid=2476, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:57:43,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9271 states. [2021-07-09 17:57:43,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9271 to 8133. [2021-07-09 17:57:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8133 states, 8132 states have (on average 4.500983767830792) internal successors, (36602), 8132 states have internal predecessors, (36602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8133 states to 8133 states and 36602 transitions. [2021-07-09 17:57:43,471 INFO L78 Accepts]: Start accepts. Automaton has 8133 states and 36602 transitions. Word has length 30 [2021-07-09 17:57:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:43,471 INFO L482 AbstractCegarLoop]: Abstraction has 8133 states and 36602 transitions. [2021-07-09 17:57:43,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 8133 states and 36602 transitions. [2021-07-09 17:57:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:43,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:43,489 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:43,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-07-09 17:57:43,689 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:43,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:43,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1090536736, now seen corresponding path program 15 times [2021-07-09 17:57:43,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:43,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793299768] [2021-07-09 17:57:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:43,881 INFO 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 17:57:43,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:43,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793299768] [2021-07-09 17:57:43,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793299768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:43,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298244936] [2021-07-09 17:57:43,881 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 17:57:43,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:57:43,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:43,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:57:43,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:44,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:44,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:44,133 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 17:57:44,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:44,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:44,139 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 17:57:44,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-07-09 17:57:44,176 INFO 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 17:57:44,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298244936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:44,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:44,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 17:57:44,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69193275] [2021-07-09 17:57:44,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:57:44,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:44,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:57:44,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:57:44,177 INFO L87 Difference]: Start difference. First operand 8133 states and 36602 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:46,323 INFO L93 Difference]: Finished difference Result 9601 states and 42387 transitions. [2021-07-09 17:57:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 17:57:46,324 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:46,351 INFO L225 Difference]: With dead ends: 9601 [2021-07-09 17:57:46,351 INFO L226 Difference]: Without dead ends: 9369 [2021-07-09 17:57:46,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1706.2ms TimeCoverageRelationStatistics Valid=589, Invalid=3071, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 17:57:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2021-07-09 17:57:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 8123. [2021-07-09 17:57:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8123 states, 8122 states have (on average 4.501354346220142) internal successors, (36560), 8122 states have internal predecessors, (36560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8123 states to 8123 states and 36560 transitions. [2021-07-09 17:57:46,576 INFO L78 Accepts]: Start accepts. Automaton has 8123 states and 36560 transitions. Word has length 30 [2021-07-09 17:57:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:46,576 INFO L482 AbstractCegarLoop]: Abstraction has 8123 states and 36560 transitions. [2021-07-09 17:57:46,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 8123 states and 36560 transitions. [2021-07-09 17:57:46,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:46,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:46,593 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:46,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-07-09 17:57:46,793 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:46,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:46,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1108317834, now seen corresponding path program 43 times [2021-07-09 17:57:46,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:46,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923260451] [2021-07-09 17:57:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:46,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:46,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923260451] [2021-07-09 17:57:46,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923260451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:46,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679157567] [2021-07-09 17:57:46,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:46,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:57:46,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:47,085 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 17:57:47,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:47,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:47,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:47,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:57:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:47,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679157567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:47,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:47,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:57:47,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799837631] [2021-07-09 17:57:47,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:57:47,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:57:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:57:47,163 INFO L87 Difference]: Start difference. First operand 8123 states and 36560 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:48,860 INFO L93 Difference]: Finished difference Result 9137 states and 40658 transitions. [2021-07-09 17:57:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:57:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:48,886 INFO L225 Difference]: With dead ends: 9137 [2021-07-09 17:57:48,886 INFO L226 Difference]: Without dead ends: 9039 [2021-07-09 17:57:48,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1282.0ms TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:57:48,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-07-09 17:57:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 8135. [2021-07-09 17:57:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 8134 states have (on average 4.5011064666830585) internal successors, (36612), 8134 states have internal predecessors, (36612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 36612 transitions. [2021-07-09 17:57:49,145 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 36612 transitions. Word has length 30 [2021-07-09 17:57:49,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:49,146 INFO L482 AbstractCegarLoop]: Abstraction has 8135 states and 36612 transitions. [2021-07-09 17:57:49,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 36612 transitions. [2021-07-09 17:57:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:49,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:49,162 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:49,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:49,363 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:49,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1660578384, now seen corresponding path program 44 times [2021-07-09 17:57:49,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:49,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629206328] [2021-07-09 17:57:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:49,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:49,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629206328] [2021-07-09 17:57:49,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629206328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:49,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490796515] [2021-07-09 17:57:49,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:57:49,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:49,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:49,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:57:49,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:49,646 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 21 treesize of output 13 [2021-07-09 17:57:49,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:49,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:49,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:49,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:57:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:49,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490796515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:49,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:49,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:57:49,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404822583] [2021-07-09 17:57:49,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:57:49,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:49,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:57:49,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:57:49,705 INFO L87 Difference]: Start difference. First operand 8135 states and 36612 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:51,083 INFO L93 Difference]: Finished difference Result 9080 states and 40453 transitions. [2021-07-09 17:57:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:57:51,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:51,111 INFO L225 Difference]: With dead ends: 9080 [2021-07-09 17:57:51,111 INFO L226 Difference]: Without dead ends: 8977 [2021-07-09 17:57:51,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1025.6ms TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:57:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8977 states. [2021-07-09 17:57:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8977 to 8129. [2021-07-09 17:57:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8129 states, 8128 states have (on average 4.500984251968504) internal successors, (36584), 8128 states have internal predecessors, (36584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8129 states to 8129 states and 36584 transitions. [2021-07-09 17:57:51,295 INFO L78 Accepts]: Start accepts. Automaton has 8129 states and 36584 transitions. Word has length 30 [2021-07-09 17:57:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:51,295 INFO L482 AbstractCegarLoop]: Abstraction has 8129 states and 36584 transitions. [2021-07-09 17:57:51,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:51,295 INFO L276 IsEmpty]: Start isEmpty. Operand 8129 states and 36584 transitions. [2021-07-09 17:57:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:51,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:51,312 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, 1, 1, 1] [2021-07-09 17:57:51,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:51,513 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:51,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:51,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1442285456, now seen corresponding path program 45 times [2021-07-09 17:57:51,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:51,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168423350] [2021-07-09 17:57:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:51,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:51,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168423350] [2021-07-09 17:57:51,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168423350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:51,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056287509] [2021-07-09 17:57:51,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:51,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:57:51,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:51,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:57:51,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:51,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:57:51,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:51,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:51,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:51,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:57:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:51,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056287509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:51,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:51,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:57:51,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667405944] [2021-07-09 17:57:51,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:57:51,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:57:51,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:57:51,967 INFO L87 Difference]: Start difference. First operand 8129 states and 36584 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:53,689 INFO L93 Difference]: Finished difference Result 9161 states and 40744 transitions. [2021-07-09 17:57:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:57:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:53,716 INFO L225 Difference]: With dead ends: 9161 [2021-07-09 17:57:53,716 INFO L226 Difference]: Without dead ends: 9063 [2021-07-09 17:57:53,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1278.3ms TimeCoverageRelationStatistics Valid=343, Invalid=1637, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:57:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9063 states. [2021-07-09 17:57:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9063 to 8135. [2021-07-09 17:57:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 8134 states have (on average 4.500860585197935) internal successors, (36610), 8134 states have internal predecessors, (36610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:53,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 36610 transitions. [2021-07-09 17:57:53,883 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 36610 transitions. Word has length 30 [2021-07-09 17:57:53,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:53,883 INFO L482 AbstractCegarLoop]: Abstraction has 8135 states and 36610 transitions. [2021-07-09 17:57:53,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:53,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 36610 transitions. [2021-07-09 17:57:53,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:53,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:53,899 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:54,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-07-09 17:57:54,100 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:54,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:54,100 INFO L82 PathProgramCache]: Analyzing trace with hash -821801390, now seen corresponding path program 46 times [2021-07-09 17:57:54,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:54,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645648209] [2021-07-09 17:57:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:54,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:54,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645648209] [2021-07-09 17:57:54,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645648209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:54,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668879538] [2021-07-09 17:57:54,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:54,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:54,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:54,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:57:54,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:54,392 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 17:57:54,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:54,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:54,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:54,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:57:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:54,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668879538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:54,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:54,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:57:54,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72155755] [2021-07-09 17:57:54,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:57:54,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:54,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:57:54,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:57:54,467 INFO L87 Difference]: Start difference. First operand 8135 states and 36610 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:55,876 INFO L93 Difference]: Finished difference Result 9131 states and 40637 transitions. [2021-07-09 17:57:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:57:55,876 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:55,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:55,901 INFO L225 Difference]: With dead ends: 9131 [2021-07-09 17:57:55,901 INFO L226 Difference]: Without dead ends: 9039 [2021-07-09 17:57:55,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1116.7ms TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:57:55,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-07-09 17:57:56,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 8135. [2021-07-09 17:57:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 8134 states have (on average 4.499877059257438) internal successors, (36602), 8134 states have internal predecessors, (36602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 36602 transitions. [2021-07-09 17:57:56,077 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 36602 transitions. Word has length 30 [2021-07-09 17:57:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:56,077 INFO L482 AbstractCegarLoop]: Abstraction has 8135 states and 36602 transitions. [2021-07-09 17:57:56,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 36602 transitions. [2021-07-09 17:57:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:56,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:56,093 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:56,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:56,294 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:56,294 INFO L82 PathProgramCache]: Analyzing trace with hash -50538734, now seen corresponding path program 47 times [2021-07-09 17:57:56,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:56,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364874756] [2021-07-09 17:57:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:56,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:56,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364874756] [2021-07-09 17:57:56,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364874756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:56,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872788896] [2021-07-09 17:57:56,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:56,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:56,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:56,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:57:56,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:56,631 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 17:57:56,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:56,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:56,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:56,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:57:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:56,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872788896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:56,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:56,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:57:56,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846382839] [2021-07-09 17:57:56,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:57:56,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:56,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:57:56,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:57:56,711 INFO L87 Difference]: Start difference. First operand 8135 states and 36602 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:58,446 INFO L93 Difference]: Finished difference Result 9288 states and 41265 transitions. [2021-07-09 17:57:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:57:58,447 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:57:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:58,473 INFO L225 Difference]: With dead ends: 9288 [2021-07-09 17:57:58,473 INFO L226 Difference]: Without dead ends: 9179 [2021-07-09 17:57:58,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1318.8ms TimeCoverageRelationStatistics Valid=343, Invalid=1463, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:57:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9179 states. [2021-07-09 17:57:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9179 to 8135. [2021-07-09 17:57:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 8134 states have (on average 4.499877059257438) internal successors, (36602), 8134 states have internal predecessors, (36602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 36602 transitions. [2021-07-09 17:57:58,716 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 36602 transitions. Word has length 30 [2021-07-09 17:57:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:58,716 INFO L482 AbstractCegarLoop]: Abstraction has 8135 states and 36602 transitions. [2021-07-09 17:57:58,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 36602 transitions. [2021-07-09 17:57:58,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:57:58,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:58,732 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:58,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-07-09 17:57:58,933 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:58,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:58,934 INFO L82 PathProgramCache]: Analyzing trace with hash -687005588, now seen corresponding path program 48 times [2021-07-09 17:57:58,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:58,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464844167] [2021-07-09 17:57:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:59,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:59,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464844167] [2021-07-09 17:57:59,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464844167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:59,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679757981] [2021-07-09 17:57:59,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:57:59,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:57:59,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:59,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:57:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:59,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:59,244 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 17:57:59,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:59,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:59,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:59,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:57:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:59,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679757981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:59,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:59,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:57:59,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837275031] [2021-07-09 17:57:59,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:57:59,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:59,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:57:59,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:57:59,385 INFO L87 Difference]: Start difference. First operand 8135 states and 36602 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:59,711 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-07-09 17:58:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:01,695 INFO L93 Difference]: Finished difference Result 9477 states and 41760 transitions. [2021-07-09 17:58:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 17:58:01,696 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:01,722 INFO L225 Difference]: With dead ends: 9477 [2021-07-09 17:58:01,722 INFO L226 Difference]: Without dead ends: 9198 [2021-07-09 17:58:01,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1744.8ms TimeCoverageRelationStatistics Valid=541, Invalid=2651, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:58:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9198 states. [2021-07-09 17:58:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9198 to 8133. [2021-07-09 17:58:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8133 states, 8132 states have (on average 4.499877029021151) internal successors, (36593), 8132 states have internal predecessors, (36593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8133 states to 8133 states and 36593 transitions. [2021-07-09 17:58:01,906 INFO L78 Accepts]: Start accepts. Automaton has 8133 states and 36593 transitions. Word has length 30 [2021-07-09 17:58:01,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:01,906 INFO L482 AbstractCegarLoop]: Abstraction has 8133 states and 36593 transitions. [2021-07-09 17:58:01,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:01,906 INFO L276 IsEmpty]: Start isEmpty. Operand 8133 states and 36593 transitions. [2021-07-09 17:58:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:02,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:02,008 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:02,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-07-09 17:58:02,209 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:02,209 INFO L82 PathProgramCache]: Analyzing trace with hash -247106348, now seen corresponding path program 49 times [2021-07-09 17:58:02,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:02,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102660078] [2021-07-09 17:58:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:02,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:02,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102660078] [2021-07-09 17:58:02,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102660078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:02,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926970961] [2021-07-09 17:58:02,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:02,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:58:02,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:02,557 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 17:58:02,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:02,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:02,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:02,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:58:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:02,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926970961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:02,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:02,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:58:02,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549445607] [2021-07-09 17:58:02,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:58:02,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:02,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:58:02,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:58:02,603 INFO L87 Difference]: Start difference. First operand 8133 states and 36593 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:04,993 INFO L93 Difference]: Finished difference Result 9584 states and 42417 transitions. [2021-07-09 17:58:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:58:04,994 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:05,021 INFO L225 Difference]: With dead ends: 9584 [2021-07-09 17:58:05,021 INFO L226 Difference]: Without dead ends: 9475 [2021-07-09 17:58:05,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1703.7ms TimeCoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:58:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9475 states. [2021-07-09 17:58:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9475 to 8149. [2021-07-09 17:58:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 8148 states have (on average 4.498404516445754) internal successors, (36653), 8148 states have internal predecessors, (36653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 36653 transitions. [2021-07-09 17:58:05,203 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 36653 transitions. Word has length 30 [2021-07-09 17:58:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:05,203 INFO L482 AbstractCegarLoop]: Abstraction has 8149 states and 36653 transitions. [2021-07-09 17:58:05,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 36653 transitions. [2021-07-09 17:58:05,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:05,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:05,220 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:05,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-07-09 17:58:05,420 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:05,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:05,420 INFO L82 PathProgramCache]: Analyzing trace with hash 618549104, now seen corresponding path program 16 times [2021-07-09 17:58:05,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:05,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046895442] [2021-07-09 17:58:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:05,590 INFO 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 17:58:05,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:05,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046895442] [2021-07-09 17:58:05,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046895442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:05,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569745731] [2021-07-09 17:58:05,590 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 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 17:58:05,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:58:05,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:05,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:58:05,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:05,864 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 17:58:05,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:05,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:05,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:05,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:58:05,906 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 17:58:05,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569745731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:05,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:05,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:58:05,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78881640] [2021-07-09 17:58:05,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:58:05,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:05,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:58:05,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:58:05,907 INFO L87 Difference]: Start difference. First operand 8149 states and 36653 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:08,223 INFO L93 Difference]: Finished difference Result 9749 states and 43033 transitions. [2021-07-09 17:58:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 17:58:08,223 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:08,252 INFO L225 Difference]: With dead ends: 9749 [2021-07-09 17:58:08,252 INFO L226 Difference]: Without dead ends: 9556 [2021-07-09 17:58:08,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1731.5ms TimeCoverageRelationStatistics Valid=523, Invalid=2899, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:58:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2021-07-09 17:58:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 8149. [2021-07-09 17:58:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 8148 states have (on average 4.496686303387334) internal successors, (36639), 8148 states have internal predecessors, (36639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 36639 transitions. [2021-07-09 17:58:08,437 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 36639 transitions. Word has length 30 [2021-07-09 17:58:08,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:08,437 INFO L482 AbstractCegarLoop]: Abstraction has 8149 states and 36639 transitions. [2021-07-09 17:58:08,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:08,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 36639 transitions. [2021-07-09 17:58:08,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:08,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:08,454 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:08,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:08,654 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:08,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:08,654 INFO L82 PathProgramCache]: Analyzing trace with hash -515852776, now seen corresponding path program 50 times [2021-07-09 17:58:08,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:08,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551988479] [2021-07-09 17:58:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:08,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:08,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551988479] [2021-07-09 17:58:08,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551988479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:08,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5686412] [2021-07-09 17:58:08,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:08,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:58:08,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:08,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:58:08,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:08,969 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 17:58:08,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:08,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:08,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:08,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-09 17:58:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:09,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5686412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:09,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:09,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:58:09,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256599142] [2021-07-09 17:58:09,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:58:09,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:09,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:58:09,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:58:09,049 INFO L87 Difference]: Start difference. First operand 8149 states and 36639 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:09,406 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-07-09 17:58:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:11,172 INFO L93 Difference]: Finished difference Result 9456 states and 41892 transitions. [2021-07-09 17:58:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:58:11,172 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:11,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:11,199 INFO L225 Difference]: With dead ends: 9456 [2021-07-09 17:58:11,199 INFO L226 Difference]: Without dead ends: 9347 [2021-07-09 17:58:11,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1535.0ms TimeCoverageRelationStatistics Valid=384, Invalid=1968, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:58:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9347 states. [2021-07-09 17:58:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9347 to 8149. [2021-07-09 17:58:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 8148 states have (on average 4.496686303387334) internal successors, (36639), 8148 states have internal predecessors, (36639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 36639 transitions. [2021-07-09 17:58:11,385 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 36639 transitions. Word has length 30 [2021-07-09 17:58:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:11,385 INFO L482 AbstractCegarLoop]: Abstraction has 8149 states and 36639 transitions. [2021-07-09 17:58:11,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 36639 transitions. [2021-07-09 17:58:11,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:11,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:11,402 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, 1] [2021-07-09 17:58:11,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-07-09 17:58:11,603 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:11,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:11,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1152319630, now seen corresponding path program 51 times [2021-07-09 17:58:11,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:11,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071474012] [2021-07-09 17:58:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:11,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:11,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071474012] [2021-07-09 17:58:11,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071474012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:11,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671645264] [2021-07-09 17:58:11,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:11,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:58:11,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:11,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:58:11,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:11,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:11,937 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 17:58:11,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:11,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:11,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:11,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-07-09 17:58:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:12,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671645264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:12,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:12,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:58:12,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537453733] [2021-07-09 17:58:12,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:58:12,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:12,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:58:12,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:58:12,053 INFO L87 Difference]: Start difference. First operand 8149 states and 36639 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:12,367 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-09 17:58:12,537 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-07-09 17:58:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:15,019 INFO L93 Difference]: Finished difference Result 9749 states and 42804 transitions. [2021-07-09 17:58:15,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 17:58:15,019 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:15,047 INFO L225 Difference]: With dead ends: 9749 [2021-07-09 17:58:15,047 INFO L226 Difference]: Without dead ends: 9434 [2021-07-09 17:58:15,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2232.1ms TimeCoverageRelationStatistics Valid=719, Invalid=3973, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 17:58:15,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9434 states. [2021-07-09 17:58:15,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9434 to 8131. [2021-07-09 17:58:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8131 states, 8130 states have (on average 4.5) internal successors, (36585), 8130 states have internal predecessors, (36585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8131 states to 8131 states and 36585 transitions. [2021-07-09 17:58:15,240 INFO L78 Accepts]: Start accepts. Automaton has 8131 states and 36585 transitions. Word has length 30 [2021-07-09 17:58:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:15,240 INFO L482 AbstractCegarLoop]: Abstraction has 8131 states and 36585 transitions. [2021-07-09 17:58:15,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:15,240 INFO L276 IsEmpty]: Start isEmpty. Operand 8131 states and 36585 transitions. [2021-07-09 17:58:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:15,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:15,256 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:15,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:15,457 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:15,457 INFO L82 PathProgramCache]: Analyzing trace with hash 106058870, now seen corresponding path program 55 times [2021-07-09 17:58:15,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:15,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729441352] [2021-07-09 17:58:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:15,630 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 17:58:15,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:15,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729441352] [2021-07-09 17:58:15,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729441352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:15,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182536881] [2021-07-09 17:58:15,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:15,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:58:15,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:15,809 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 17:58:15,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:15,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:15,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:15,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:58:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:15,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182536881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:15,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:15,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:58:15,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106429744] [2021-07-09 17:58:15,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:58:15,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:15,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:58:15,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:58:15,847 INFO L87 Difference]: Start difference. First operand 8131 states and 36585 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:18,684 INFO L93 Difference]: Finished difference Result 12980 states and 55445 transitions. [2021-07-09 17:58:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 17:58:18,684 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:18,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:18,726 INFO L225 Difference]: With dead ends: 12980 [2021-07-09 17:58:18,726 INFO L226 Difference]: Without dead ends: 12746 [2021-07-09 17:58:18,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 1819.2ms TimeCoverageRelationStatistics Valid=596, Invalid=3564, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 17:58:18,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12746 states. [2021-07-09 17:58:18,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12746 to 8336. [2021-07-09 17:58:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8336 states, 8335 states have (on average 4.505698860227954) internal successors, (37555), 8335 states have internal predecessors, (37555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8336 states to 8336 states and 37555 transitions. [2021-07-09 17:58:18,962 INFO L78 Accepts]: Start accepts. Automaton has 8336 states and 37555 transitions. Word has length 30 [2021-07-09 17:58:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:18,963 INFO L482 AbstractCegarLoop]: Abstraction has 8336 states and 37555 transitions. [2021-07-09 17:58:18,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 8336 states and 37555 transitions. [2021-07-09 17:58:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:18,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:18,979 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:19,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:19,179 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:19,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:19,180 INFO L82 PathProgramCache]: Analyzing trace with hash 291052528, now seen corresponding path program 52 times [2021-07-09 17:58:19,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:19,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020466466] [2021-07-09 17:58:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:19,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:19,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020466466] [2021-07-09 17:58:19,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020466466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:19,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142593324] [2021-07-09 17:58:19,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:19,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:58:19,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:19,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:58:19,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:19,514 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 17:58:19,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:19,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:19,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:19,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-09 17:58:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:19,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142593324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:19,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:19,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:58:19,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896278392] [2021-07-09 17:58:19,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:58:19,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:19,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:58:19,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:58:19,554 INFO L87 Difference]: Start difference. First operand 8336 states and 37555 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:22,767 INFO L93 Difference]: Finished difference Result 13690 states and 58199 transitions. [2021-07-09 17:58:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 17:58:22,768 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:22,806 INFO L225 Difference]: With dead ends: 13690 [2021-07-09 17:58:22,806 INFO L226 Difference]: Without dead ends: 13486 [2021-07-09 17:58:22,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1974.0ms TimeCoverageRelationStatistics Valid=784, Invalid=4618, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 17:58:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13486 states. [2021-07-09 17:58:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13486 to 8346. [2021-07-09 17:58:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8346 states, 8345 states have (on average 4.511084481725584) internal successors, (37645), 8345 states have internal predecessors, (37645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8346 states to 8346 states and 37645 transitions. [2021-07-09 17:58:23,059 INFO L78 Accepts]: Start accepts. Automaton has 8346 states and 37645 transitions. Word has length 30 [2021-07-09 17:58:23,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:23,059 INFO L482 AbstractCegarLoop]: Abstraction has 8346 states and 37645 transitions. [2021-07-09 17:58:23,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:23,059 INFO L276 IsEmpty]: Start isEmpty. Operand 8346 states and 37645 transitions. [2021-07-09 17:58:23,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:23,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:23,076 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:23,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-07-09 17:58:23,276 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:23,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:23,277 INFO L82 PathProgramCache]: Analyzing trace with hash -869082702, now seen corresponding path program 56 times [2021-07-09 17:58:23,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:23,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793783808] [2021-07-09 17:58:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:23,428 INFO 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 17:58:23,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:23,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793783808] [2021-07-09 17:58:23,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793783808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:23,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600318337] [2021-07-09 17:58:23,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:23,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:58:23,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:23,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:58:23,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:23,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:23,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 17:58:23,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:23,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:23,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:23,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:58:23,781 INFO 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 17:58:23,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600318337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:23,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:23,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:58:23,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601099908] [2021-07-09 17:58:23,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:58:23,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:23,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:58:23,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:58:23,782 INFO L87 Difference]: Start difference. First operand 8346 states and 37645 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:27,402 INFO L93 Difference]: Finished difference Result 12745 states and 54451 transitions. [2021-07-09 17:58:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 17:58:27,403 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:27,495 INFO L225 Difference]: With dead ends: 12745 [2021-07-09 17:58:27,495 INFO L226 Difference]: Without dead ends: 12209 [2021-07-09 17:58:27,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 2722.0ms TimeCoverageRelationStatistics Valid=937, Invalid=5705, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 17:58:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12209 states. [2021-07-09 17:58:27,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12209 to 8367. [2021-07-09 17:58:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8367 states, 8366 states have (on average 4.511714080803252) internal successors, (37745), 8366 states have internal predecessors, (37745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8367 states to 8367 states and 37745 transitions. [2021-07-09 17:58:27,701 INFO L78 Accepts]: Start accepts. Automaton has 8367 states and 37745 transitions. Word has length 30 [2021-07-09 17:58:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:27,701 INFO L482 AbstractCegarLoop]: Abstraction has 8367 states and 37745 transitions. [2021-07-09 17:58:27,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 8367 states and 37745 transitions. [2021-07-09 17:58:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:27,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:27,717 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:27,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-07-09 17:58:27,918 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:27,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:27,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1182609098, now seen corresponding path program 57 times [2021-07-09 17:58:27,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:27,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715226718] [2021-07-09 17:58:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:28,069 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 17:58:28,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:28,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715226718] [2021-07-09 17:58:28,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715226718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:28,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789639077] [2021-07-09 17:58:28,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:28,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:58:28,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:28,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:58:28,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:28,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:28,239 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 17:58:28,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:28,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:28,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:28,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:58:28,356 INFO 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 17:58:28,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789639077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:28,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:28,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:58:28,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847733180] [2021-07-09 17:58:28,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:58:28,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:58:28,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:58:28,357 INFO L87 Difference]: Start difference. First operand 8367 states and 37745 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:31,790 INFO L93 Difference]: Finished difference Result 13024 states and 56439 transitions. [2021-07-09 17:58:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 17:58:31,791 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:31,828 INFO L225 Difference]: With dead ends: 13024 [2021-07-09 17:58:31,828 INFO L226 Difference]: Without dead ends: 12653 [2021-07-09 17:58:31,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 2699.1ms TimeCoverageRelationStatistics Valid=1048, Invalid=5594, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 17:58:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12653 states. [2021-07-09 17:58:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12653 to 8419. [2021-07-09 17:58:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8419 states, 8418 states have (on average 4.507959135186505) internal successors, (37948), 8418 states have internal predecessors, (37948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:32,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8419 states to 8419 states and 37948 transitions. [2021-07-09 17:58:32,081 INFO L78 Accepts]: Start accepts. Automaton has 8419 states and 37948 transitions. Word has length 30 [2021-07-09 17:58:32,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:32,081 INFO L482 AbstractCegarLoop]: Abstraction has 8419 states and 37948 transitions. [2021-07-09 17:58:32,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 8419 states and 37948 transitions. [2021-07-09 17:58:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:32,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:32,099 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:32,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-07-09 17:58:32,301 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:32,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:32,301 INFO L82 PathProgramCache]: Analyzing trace with hash 997580912, now seen corresponding path program 53 times [2021-07-09 17:58:32,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:32,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452606432] [2021-07-09 17:58:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:32,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:32,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452606432] [2021-07-09 17:58:32,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452606432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:32,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486102553] [2021-07-09 17:58:32,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:32,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:58:32,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:32,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:58:32,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:32,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:58:32,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:32,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:32,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:32,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:58:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:32,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486102553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:32,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:32,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:58:32,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111917599] [2021-07-09 17:58:32,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:58:32,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:32,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:58:32,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:58:32,652 INFO L87 Difference]: Start difference. First operand 8419 states and 37948 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:35,414 INFO L93 Difference]: Finished difference Result 12779 states and 55012 transitions. [2021-07-09 17:58:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 17:58:35,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:35,451 INFO L225 Difference]: With dead ends: 12779 [2021-07-09 17:58:35,451 INFO L226 Difference]: Without dead ends: 12686 [2021-07-09 17:58:35,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1748.9ms TimeCoverageRelationStatistics Valid=710, Invalid=4402, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 17:58:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12686 states. [2021-07-09 17:58:35,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12686 to 8432. [2021-07-09 17:58:35,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.508361997390582) internal successors, (38010), 8431 states have internal predecessors, (38010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 38010 transitions. [2021-07-09 17:58:35,709 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 38010 transitions. Word has length 30 [2021-07-09 17:58:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:35,709 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 38010 transitions. [2021-07-09 17:58:35,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 38010 transitions. [2021-07-09 17:58:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:35,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:35,727 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:35,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:35,928 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:35,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1115456238, now seen corresponding path program 54 times [2021-07-09 17:58:35,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:35,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82867072] [2021-07-09 17:58:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:36,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:36,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82867072] [2021-07-09 17:58:36,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82867072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:36,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169374876] [2021-07-09 17:58:36,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:36,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:58:36,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:36,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:58:36,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:36,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:36,236 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 17:58:36,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:36,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:36,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:36,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:58:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:36,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169374876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:36,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:36,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:58:36,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809083087] [2021-07-09 17:58:36,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:58:36,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:36,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:58:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:58:36,313 INFO L87 Difference]: Start difference. First operand 8432 states and 38010 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:39,005 INFO L93 Difference]: Finished difference Result 13259 states and 56756 transitions. [2021-07-09 17:58:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 17:58:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:39,047 INFO L225 Difference]: With dead ends: 13259 [2021-07-09 17:58:39,047 INFO L226 Difference]: Without dead ends: 13156 [2021-07-09 17:58:39,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 1691.9ms TimeCoverageRelationStatistics Valid=640, Invalid=3916, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 17:58:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13156 states. [2021-07-09 17:58:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13156 to 8432. [2021-07-09 17:58:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.507650338038192) internal successors, (38004), 8431 states have internal predecessors, (38004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:39,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 38004 transitions. [2021-07-09 17:58:39,297 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 38004 transitions. Word has length 30 [2021-07-09 17:58:39,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:39,297 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 38004 transitions. [2021-07-09 17:58:39,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:39,297 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 38004 transitions. [2021-07-09 17:58:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:39,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:39,314 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:39,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:39,514 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:39,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1644847312, now seen corresponding path program 58 times [2021-07-09 17:58:39,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:39,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350386129] [2021-07-09 17:58:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:39,689 INFO 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 17:58:39,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:39,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350386129] [2021-07-09 17:58:39,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350386129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:39,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712266125] [2021-07-09 17:58:39,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:39,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:58:39,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:39,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:58:39,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:39,872 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 17:58:39,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:39,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:39,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:39,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-09 17:58:39,910 INFO 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 17:58:39,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712266125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:39,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:39,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:58:39,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221593440] [2021-07-09 17:58:39,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:58:39,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:39,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:58:39,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:58:39,911 INFO L87 Difference]: Start difference. First operand 8432 states and 38004 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:42,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:42,818 INFO L93 Difference]: Finished difference Result 14578 states and 61676 transitions. [2021-07-09 17:58:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 17:58:42,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:42,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:42,867 INFO L225 Difference]: With dead ends: 14578 [2021-07-09 17:58:42,867 INFO L226 Difference]: Without dead ends: 14309 [2021-07-09 17:58:42,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 1800.8ms TimeCoverageRelationStatistics Valid=627, Invalid=3929, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 17:58:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14309 states. [2021-07-09 17:58:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14309 to 8664. [2021-07-09 17:58:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8664 states, 8663 states have (on average 4.510446727461618) internal successors, (39074), 8663 states have internal predecessors, (39074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:43,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8664 states to 8664 states and 39074 transitions. [2021-07-09 17:58:43,166 INFO L78 Accepts]: Start accepts. Automaton has 8664 states and 39074 transitions. Word has length 30 [2021-07-09 17:58:43,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:43,166 INFO L482 AbstractCegarLoop]: Abstraction has 8664 states and 39074 transitions. [2021-07-09 17:58:43,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 8664 states and 39074 transitions. [2021-07-09 17:58:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:43,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:43,184 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:43,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2021-07-09 17:58:43,384 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:43,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:43,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1829840970, now seen corresponding path program 55 times [2021-07-09 17:58:43,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:43,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224515165] [2021-07-09 17:58:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:43,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:43,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224515165] [2021-07-09 17:58:43,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224515165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:43,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457404042] [2021-07-09 17:58:43,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:43,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:58:43,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:43,726 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 17:58:43,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:43,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:43,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:43,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-09 17:58:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:43,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457404042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:43,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:43,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:58:43,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502759766] [2021-07-09 17:58:43,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:58:43,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:43,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:58:43,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:58:43,765 INFO L87 Difference]: Start difference. First operand 8664 states and 39074 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:47,259 INFO L93 Difference]: Finished difference Result 14983 states and 63275 transitions. [2021-07-09 17:58:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 17:58:47,259 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:47,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:47,304 INFO L225 Difference]: With dead ends: 14983 [2021-07-09 17:58:47,304 INFO L226 Difference]: Without dead ends: 14789 [2021-07-09 17:58:47,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 1991.2ms TimeCoverageRelationStatistics Valid=821, Invalid=5031, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 17:58:47,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14789 states. [2021-07-09 17:58:47,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14789 to 8644. [2021-07-09 17:58:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8643 states have (on average 4.511859308110609) internal successors, (38996), 8643 states have internal predecessors, (38996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 38996 transitions. [2021-07-09 17:58:47,579 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 38996 transitions. Word has length 30 [2021-07-09 17:58:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:47,579 INFO L482 AbstractCegarLoop]: Abstraction has 8644 states and 38996 transitions. [2021-07-09 17:58:47,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 38996 transitions. [2021-07-09 17:58:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:47,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:47,596 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:47,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:47,796 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:47,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:47,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1510385476, now seen corresponding path program 59 times [2021-07-09 17:58:47,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:47,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555695016] [2021-07-09 17:58:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:47,953 INFO 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 17:58:47,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:47,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555695016] [2021-07-09 17:58:47,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555695016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:47,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674629579] [2021-07-09 17:58:47,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:47,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:58:47,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:47,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:58:47,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:48,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:48,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:48,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:58:48,218 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 17:58:48,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:48,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:48,226 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 17:58:48,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 17:58:48,272 INFO 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 17:58:48,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674629579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:48,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:48,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:58:48,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422149250] [2021-07-09 17:58:48,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:58:48,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:48,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:58:48,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:58:48,273 INFO L87 Difference]: Start difference. First operand 8644 states and 38996 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:50,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:50,440 INFO L93 Difference]: Finished difference Result 11759 states and 50895 transitions. [2021-07-09 17:58:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:58:50,440 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:50,476 INFO L225 Difference]: With dead ends: 11759 [2021-07-09 17:58:50,476 INFO L226 Difference]: Without dead ends: 11668 [2021-07-09 17:58:50,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1486.8ms TimeCoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:58:50,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11668 states. [2021-07-09 17:58:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11668 to 8644. [2021-07-09 17:58:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8643 states have (on average 4.511859308110609) internal successors, (38996), 8643 states have internal predecessors, (38996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 38996 transitions. [2021-07-09 17:58:50,709 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 38996 transitions. Word has length 30 [2021-07-09 17:58:50,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:50,709 INFO L482 AbstractCegarLoop]: Abstraction has 8644 states and 38996 transitions. [2021-07-09 17:58:50,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:50,709 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 38996 transitions. [2021-07-09 17:58:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:50,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:50,726 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:50,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-07-09 17:58:50,927 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:50,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:50,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1172103252, now seen corresponding path program 60 times [2021-07-09 17:58:50,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:50,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704504169] [2021-07-09 17:58:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:51,085 INFO 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 17:58:51,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:51,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704504169] [2021-07-09 17:58:51,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704504169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:51,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889116299] [2021-07-09 17:58:51,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:51,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:58:51,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:58:51,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:51,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:51,261 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 17:58:51,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:51,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:51,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:51,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:58:51,381 INFO 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 17:58:51,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889116299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:51,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:51,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:58:51,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654806755] [2021-07-09 17:58:51,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:58:51,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:51,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:58:51,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:58:51,382 INFO L87 Difference]: Start difference. First operand 8644 states and 38996 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:55,904 INFO L93 Difference]: Finished difference Result 14186 states and 60111 transitions. [2021-07-09 17:58:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-09 17:58:55,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:58:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:55,946 INFO L225 Difference]: With dead ends: 14186 [2021-07-09 17:58:55,946 INFO L226 Difference]: Without dead ends: 13820 [2021-07-09 17:58:55,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2808 ImplicationChecksByTransitivity, 2677.8ms TimeCoverageRelationStatistics Valid=846, Invalid=7344, Unknown=0, NotChecked=0, Total=8190 [2021-07-09 17:58:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13820 states. [2021-07-09 17:58:56,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13820 to 8969. [2021-07-09 17:58:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8968 states have (on average 4.516503122212311) internal successors, (40504), 8968 states have internal predecessors, (40504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 40504 transitions. [2021-07-09 17:58:56,236 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 40504 transitions. Word has length 30 [2021-07-09 17:58:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:56,236 INFO L482 AbstractCegarLoop]: Abstraction has 8969 states and 40504 transitions. [2021-07-09 17:58:56,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 40504 transitions. [2021-07-09 17:58:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:58:56,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:56,255 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:56,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable586,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:56,455 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:56,455 INFO L82 PathProgramCache]: Analyzing trace with hash 314992000, now seen corresponding path program 56 times [2021-07-09 17:58:56,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:56,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355649553] [2021-07-09 17:58:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:56,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:56,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355649553] [2021-07-09 17:58:56,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355649553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:56,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561602808] [2021-07-09 17:58:56,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:56,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:58:56,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:56,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:58:56,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:56,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:56,766 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 17:58:56,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:56,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:56,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:56,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:58:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:56,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561602808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:56,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:56,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 17:58:56,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233206265] [2021-07-09 17:58:56,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:58:56,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:56,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:58:56,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:58:56,869 INFO L87 Difference]: Start difference. First operand 8969 states and 40504 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:00,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:00,042 INFO L93 Difference]: Finished difference Result 13406 states and 57733 transitions. [2021-07-09 17:59:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 17:59:00,042 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:00,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:00,082 INFO L225 Difference]: With dead ends: 13406 [2021-07-09 17:59:00,082 INFO L226 Difference]: Without dead ends: 13237 [2021-07-09 17:59:00,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1940.4ms TimeCoverageRelationStatistics Valid=610, Invalid=4792, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 17:59:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13237 states. [2021-07-09 17:59:00,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13237 to 8990. [2021-07-09 17:59:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8990 states, 8989 states have (on average 4.515073979308043) internal successors, (40586), 8989 states have internal predecessors, (40586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 40586 transitions. [2021-07-09 17:59:00,349 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 40586 transitions. Word has length 30 [2021-07-09 17:59:00,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:00,350 INFO L482 AbstractCegarLoop]: Abstraction has 8990 states and 40586 transitions. [2021-07-09 17:59:00,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 40586 transitions. [2021-07-09 17:59:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:00,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:00,369 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:00,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-07-09 17:59:00,569 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:00,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2081020532, now seen corresponding path program 57 times [2021-07-09 17:59:00,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:00,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324320899] [2021-07-09 17:59:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:00,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:00,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324320899] [2021-07-09 17:59:00,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324320899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:00,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124659503] [2021-07-09 17:59:00,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:00,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:59:00,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:00,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:59:00,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:00,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:00,876 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 17:59:00,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:00,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:00,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:00,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 17:59:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:00,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124659503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:00,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:00,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:59:00,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599152544] [2021-07-09 17:59:00,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:59:00,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:00,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:59:00,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:59:00,995 INFO L87 Difference]: Start difference. First operand 8990 states and 40586 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:05,863 INFO L93 Difference]: Finished difference Result 14831 states and 62753 transitions. [2021-07-09 17:59:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 17:59:05,864 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:05,908 INFO L225 Difference]: With dead ends: 14831 [2021-07-09 17:59:05,908 INFO L226 Difference]: Without dead ends: 14499 [2021-07-09 17:59:05,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3495 ImplicationChecksByTransitivity, 3052.0ms TimeCoverageRelationStatistics Valid=1030, Invalid=8870, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 17:59:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14499 states. [2021-07-09 17:59:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14499 to 9142. [2021-07-09 17:59:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9142 states, 9141 states have (on average 4.520183787331802) internal successors, (41319), 9141 states have internal predecessors, (41319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9142 states to 9142 states and 41319 transitions. [2021-07-09 17:59:06,242 INFO L78 Accepts]: Start accepts. Automaton has 9142 states and 41319 transitions. Word has length 30 [2021-07-09 17:59:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:06,242 INFO L482 AbstractCegarLoop]: Abstraction has 9142 states and 41319 transitions. [2021-07-09 17:59:06,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 9142 states and 41319 transitions. [2021-07-09 17:59:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:06,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:06,261 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:06,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:06,461 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:06,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1966270066, now seen corresponding path program 61 times [2021-07-09 17:59:06,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:06,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162253831] [2021-07-09 17:59:06,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:06,610 INFO 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 17:59:06,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:06,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162253831] [2021-07-09 17:59:06,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162253831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:06,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276496037] [2021-07-09 17:59:06,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:06,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:06,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:06,769 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 21 treesize of output 13 [2021-07-09 17:59:06,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:06,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:06,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:06,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-09 17:59:06,826 INFO 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 17:59:06,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276496037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:06,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:06,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:59:06,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898474112] [2021-07-09 17:59:06,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:59:06,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:06,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:59:06,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:59:06,827 INFO L87 Difference]: Start difference. First operand 9142 states and 41319 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:09,009 INFO L93 Difference]: Finished difference Result 12965 states and 56453 transitions. [2021-07-09 17:59:09,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 17:59:09,009 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:09,047 INFO L225 Difference]: With dead ends: 12965 [2021-07-09 17:59:09,048 INFO L226 Difference]: Without dead ends: 12844 [2021-07-09 17:59:09,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 1422.7ms TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 17:59:09,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12844 states. [2021-07-09 17:59:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12844 to 9180. [2021-07-09 17:59:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 9179 states have (on average 4.517049787558558) internal successors, (41462), 9179 states have internal predecessors, (41462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 41462 transitions. [2021-07-09 17:59:09,388 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 41462 transitions. Word has length 30 [2021-07-09 17:59:09,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:09,388 INFO L482 AbstractCegarLoop]: Abstraction has 9180 states and 41462 transitions. [2021-07-09 17:59:09,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:09,388 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 41462 transitions. [2021-07-09 17:59:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:09,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:09,406 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:09,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:09,607 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:09,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:09,607 INFO L82 PathProgramCache]: Analyzing trace with hash -953481476, now seen corresponding path program 62 times [2021-07-09 17:59:09,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:09,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584168961] [2021-07-09 17:59:09,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:09,750 INFO 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 17:59:09,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:09,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584168961] [2021-07-09 17:59:09,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584168961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:09,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905036149] [2021-07-09 17:59:09,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:09,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:59:09,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:09,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:59:09,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:09,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:09,906 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 17:59:09,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:09,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:09,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:09,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:59:10,055 INFO 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 17:59:10,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905036149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:10,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:10,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:59:10,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405710269] [2021-07-09 17:59:10,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:59:10,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:10,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:59:10,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:59:10,056 INFO L87 Difference]: Start difference. First operand 9180 states and 41462 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:13,319 INFO L93 Difference]: Finished difference Result 11681 states and 51110 transitions. [2021-07-09 17:59:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 17:59:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:13,353 INFO L225 Difference]: With dead ends: 11681 [2021-07-09 17:59:13,353 INFO L226 Difference]: Without dead ends: 11473 [2021-07-09 17:59:13,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2322.0ms TimeCoverageRelationStatistics Valid=666, Invalid=4304, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:59:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11473 states. [2021-07-09 17:59:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11473 to 9193. [2021-07-09 17:59:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9192 states have (on average 4.516753698868581) internal successors, (41518), 9192 states have internal predecessors, (41518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 41518 transitions. [2021-07-09 17:59:13,583 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 41518 transitions. Word has length 30 [2021-07-09 17:59:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:13,583 INFO L482 AbstractCegarLoop]: Abstraction has 9193 states and 41518 transitions. [2021-07-09 17:59:13,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 41518 transitions. [2021-07-09 17:59:13,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:13,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:13,601 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:13,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable594 [2021-07-09 17:59:13,802 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:13,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:13,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1267007872, now seen corresponding path program 63 times [2021-07-09 17:59:13,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:13,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351221449] [2021-07-09 17:59:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:13,945 INFO 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 17:59:13,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:13,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351221449] [2021-07-09 17:59:13,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351221449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:13,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423142094] [2021-07-09 17:59:13,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:13,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:59:13,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:13,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:59:13,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:14,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:14,101 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 17:59:14,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:14,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:14,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:14,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:59:14,251 INFO 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 17:59:14,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423142094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:14,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:14,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:59:14,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295255350] [2021-07-09 17:59:14,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:59:14,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:14,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:59:14,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:59:14,252 INFO L87 Difference]: Start difference. First operand 9193 states and 41518 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:17,279 INFO L93 Difference]: Finished difference Result 11719 states and 51625 transitions. [2021-07-09 17:59:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 17:59:17,279 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:17,311 INFO L225 Difference]: With dead ends: 11719 [2021-07-09 17:59:17,311 INFO L226 Difference]: Without dead ends: 11495 [2021-07-09 17:59:17,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2255.7ms TimeCoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:59:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11495 states. [2021-07-09 17:59:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11495 to 9186. [2021-07-09 17:59:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9186 states, 9185 states have (on average 4.517365269461078) internal successors, (41492), 9185 states have internal predecessors, (41492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9186 states to 9186 states and 41492 transitions. [2021-07-09 17:59:17,529 INFO L78 Accepts]: Start accepts. Automaton has 9186 states and 41492 transitions. Word has length 30 [2021-07-09 17:59:17,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:17,529 INFO L482 AbstractCegarLoop]: Abstraction has 9186 states and 41492 transitions. [2021-07-09 17:59:17,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 9186 states and 41492 transitions. [2021-07-09 17:59:17,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:17,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:17,547 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:17,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-07-09 17:59:17,748 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:17,748 INFO L82 PathProgramCache]: Analyzing trace with hash 343082850, now seen corresponding path program 64 times [2021-07-09 17:59:17,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:17,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30564741] [2021-07-09 17:59:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:17,906 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 17:59:17,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:17,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30564741] [2021-07-09 17:59:17,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30564741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:17,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778653102] [2021-07-09 17:59:17,906 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 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 17:59:17,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:59:17,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:17,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:17,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:18,051 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 17:59:18,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:18,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:18,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:18,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:59:18,126 INFO 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 17:59:18,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778653102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:18,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:18,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:59:18,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787947180] [2021-07-09 17:59:18,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:59:18,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:59:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:59:18,127 INFO L87 Difference]: Start difference. First operand 9186 states and 41492 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:19,807 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-07-09 17:59:20,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:20,527 INFO L93 Difference]: Finished difference Result 11646 states and 51132 transitions. [2021-07-09 17:59:20,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 17:59:20,527 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:20,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:20,560 INFO L225 Difference]: With dead ends: 11646 [2021-07-09 17:59:20,560 INFO L226 Difference]: Without dead ends: 11541 [2021-07-09 17:59:20,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1735.8ms TimeCoverageRelationStatistics Valid=619, Invalid=3413, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 17:59:20,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11541 states. [2021-07-09 17:59:20,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11541 to 9188. [2021-07-09 17:59:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9188 states, 9187 states have (on average 4.517470338521824) internal successors, (41502), 9187 states have internal predecessors, (41502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9188 states to 9188 states and 41502 transitions. [2021-07-09 17:59:20,794 INFO L78 Accepts]: Start accepts. Automaton has 9188 states and 41502 transitions. Word has length 30 [2021-07-09 17:59:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:20,794 INFO L482 AbstractCegarLoop]: Abstraction has 9188 states and 41502 transitions. [2021-07-09 17:59:20,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 9188 states and 41502 transitions. [2021-07-09 17:59:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:20,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:20,813 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:21,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-07-09 17:59:21,014 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:21,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:21,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1007485592, now seen corresponding path program 65 times [2021-07-09 17:59:21,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:21,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194002736] [2021-07-09 17:59:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:21,169 INFO 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 17:59:21,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:21,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194002736] [2021-07-09 17:59:21,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194002736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:21,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676398608] [2021-07-09 17:59:21,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:21,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:59:21,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:21,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:21,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:21,316 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 17:59:21,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:21,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:21,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:21,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:59:21,391 INFO 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 17:59:21,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676398608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:21,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:21,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:59:21,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471613542] [2021-07-09 17:59:21,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:59:21,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:21,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:59:21,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:59:21,392 INFO L87 Difference]: Start difference. First operand 9188 states and 41502 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:23,673 INFO L93 Difference]: Finished difference Result 12741 states and 55006 transitions. [2021-07-09 17:59:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 17:59:23,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:23,717 INFO L225 Difference]: With dead ends: 12741 [2021-07-09 17:59:23,717 INFO L226 Difference]: Without dead ends: 12647 [2021-07-09 17:59:23,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 1579.5ms TimeCoverageRelationStatistics Valid=742, Invalid=4088, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:59:23,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12647 states. [2021-07-09 17:59:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12647 to 9207. [2021-07-09 17:59:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9207 states, 9206 states have (on average 4.517597219204866) internal successors, (41589), 9206 states have internal predecessors, (41589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:23,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9207 states to 9207 states and 41589 transitions. [2021-07-09 17:59:23,994 INFO L78 Accepts]: Start accepts. Automaton has 9207 states and 41589 transitions. Word has length 30 [2021-07-09 17:59:23,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:23,994 INFO L482 AbstractCegarLoop]: Abstraction has 9207 states and 41589 transitions. [2021-07-09 17:59:23,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 9207 states and 41589 transitions. [2021-07-09 17:59:24,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:24,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:24,014 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:24,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:24,215 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:24,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:24,215 INFO L82 PathProgramCache]: Analyzing trace with hash -375717864, now seen corresponding path program 66 times [2021-07-09 17:59:24,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:24,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852024444] [2021-07-09 17:59:24,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:24,363 INFO 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 17:59:24,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:24,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852024444] [2021-07-09 17:59:24,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852024444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:24,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437631874] [2021-07-09 17:59:24,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:24,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:59:24,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:24,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:59:24,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:24,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:24,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:24,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:24,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 17:59:24,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:24,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:24,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:24,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-07-09 17:59:24,728 INFO 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 17:59:24,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437631874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:24,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:24,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:59:24,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533053859] [2021-07-09 17:59:24,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:59:24,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:24,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:59:24,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:59:24,729 INFO L87 Difference]: Start difference. First operand 9207 states and 41589 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:26,538 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-07-09 17:59:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:28,429 INFO L93 Difference]: Finished difference Result 11871 states and 52030 transitions. [2021-07-09 17:59:28,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 17:59:28,430 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:28,466 INFO L225 Difference]: With dead ends: 11871 [2021-07-09 17:59:28,466 INFO L226 Difference]: Without dead ends: 11588 [2021-07-09 17:59:28,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 2735.9ms TimeCoverageRelationStatistics Valid=1061, Invalid=5581, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 17:59:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11588 states. [2021-07-09 17:59:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11588 to 9216. [2021-07-09 17:59:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 9215 states have (on average 4.516766142159523) internal successors, (41622), 9215 states have internal predecessors, (41622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 41622 transitions. [2021-07-09 17:59:28,699 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 41622 transitions. Word has length 30 [2021-07-09 17:59:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:28,699 INFO L482 AbstractCegarLoop]: Abstraction has 9216 states and 41622 transitions. [2021-07-09 17:59:28,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 41622 transitions. [2021-07-09 17:59:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:28,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:28,718 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:28,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:28,918 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:28,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:28,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2135008526, now seen corresponding path program 67 times [2021-07-09 17:59:28,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:28,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763463673] [2021-07-09 17:59:28,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:29,076 INFO 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 17:59:29,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:29,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763463673] [2021-07-09 17:59:29,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763463673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:29,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770350603] [2021-07-09 17:59:29,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:29,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:29,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:29,216 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 21 treesize of output 13 [2021-07-09 17:59:29,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:29,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:29,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:29,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:59:29,294 INFO 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 17:59:29,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770350603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:29,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:29,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:59:29,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343921029] [2021-07-09 17:59:29,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:59:29,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:29,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:59:29,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:59:29,295 INFO L87 Difference]: Start difference. First operand 9216 states and 41622 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:32,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:32,231 INFO L93 Difference]: Finished difference Result 13587 states and 58912 transitions. [2021-07-09 17:59:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 17:59:32,231 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:32,273 INFO L225 Difference]: With dead ends: 13587 [2021-07-09 17:59:32,273 INFO L226 Difference]: Without dead ends: 13479 [2021-07-09 17:59:32,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 2077.2ms TimeCoverageRelationStatistics Valid=1140, Invalid=6000, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 17:59:32,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13479 states. [2021-07-09 17:59:32,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13479 to 9240. [2021-07-09 17:59:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9240 states, 9239 states have (on average 4.517372009957787) internal successors, (41736), 9239 states have internal predecessors, (41736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9240 states to 9240 states and 41736 transitions. [2021-07-09 17:59:32,540 INFO L78 Accepts]: Start accepts. Automaton has 9240 states and 41736 transitions. Word has length 30 [2021-07-09 17:59:32,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:32,540 INFO L482 AbstractCegarLoop]: Abstraction has 9240 states and 41736 transitions. [2021-07-09 17:59:32,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:32,541 INFO L276 IsEmpty]: Start isEmpty. Operand 9240 states and 41736 transitions. [2021-07-09 17:59:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:32,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:32,559 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:32,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:32,760 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:32,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:32,760 INFO L82 PathProgramCache]: Analyzing trace with hash -587718528, now seen corresponding path program 58 times [2021-07-09 17:59:32,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:32,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694685730] [2021-07-09 17:59:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:32,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:32,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694685730] [2021-07-09 17:59:32,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694685730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:32,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094456975] [2021-07-09 17:59:32,887 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 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 17:59:32,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:59:32,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:32,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:33,032 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 17:59:33,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:33,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:33,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:33,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:59:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:33,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094456975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:33,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:33,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:59:33,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104945324] [2021-07-09 17:59:33,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:59:33,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:33,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:59:33,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:59:33,109 INFO L87 Difference]: Start difference. First operand 9240 states and 41736 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:33,382 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-07-09 17:59:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:35,664 INFO L93 Difference]: Finished difference Result 11652 states and 51331 transitions. [2021-07-09 17:59:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 17:59:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:35,698 INFO L225 Difference]: With dead ends: 11652 [2021-07-09 17:59:35,698 INFO L226 Difference]: Without dead ends: 11539 [2021-07-09 17:59:35,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1868.5ms TimeCoverageRelationStatistics Valid=601, Invalid=3059, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 17:59:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11539 states. [2021-07-09 17:59:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11539 to 9263. [2021-07-09 17:59:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9263 states, 9262 states have (on average 4.5182465990066945) internal successors, (41848), 9262 states have internal predecessors, (41848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9263 states to 9263 states and 41848 transitions. [2021-07-09 17:59:35,947 INFO L78 Accepts]: Start accepts. Automaton has 9263 states and 41848 transitions. Word has length 30 [2021-07-09 17:59:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:35,947 INFO L482 AbstractCegarLoop]: Abstraction has 9263 states and 41848 transitions. [2021-07-09 17:59:35,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 9263 states and 41848 transitions. [2021-07-09 17:59:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:35,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:35,966 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:36,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:36,166 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:36,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1044003546, now seen corresponding path program 59 times [2021-07-09 17:59:36,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:36,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445292714] [2021-07-09 17:59:36,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:36,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:36,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445292714] [2021-07-09 17:59:36,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445292714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:36,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908633509] [2021-07-09 17:59:36,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:36,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:59:36,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:36,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:36,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:36,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:59:36,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:36,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:36,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:36,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:59:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:36,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908633509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:36,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:36,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:59:36,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097381962] [2021-07-09 17:59:36,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:59:36,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:36,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:59:36,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:59:36,505 INFO L87 Difference]: Start difference. First operand 9263 states and 41848 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:38,495 INFO L93 Difference]: Finished difference Result 11561 states and 51021 transitions. [2021-07-09 17:59:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:59:38,495 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:38,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:38,528 INFO L225 Difference]: With dead ends: 11561 [2021-07-09 17:59:38,528 INFO L226 Difference]: Without dead ends: 11452 [2021-07-09 17:59:38,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1298.4ms TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:59:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11452 states. [2021-07-09 17:59:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11452 to 9261. [2021-07-09 17:59:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.517278617710583) internal successors, (41830), 9260 states have internal predecessors, (41830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 41830 transitions. [2021-07-09 17:59:38,781 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 41830 transitions. Word has length 30 [2021-07-09 17:59:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:38,781 INFO L482 AbstractCegarLoop]: Abstraction has 9261 states and 41830 transitions. [2021-07-09 17:59:38,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 41830 transitions. [2021-07-09 17:59:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:38,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:38,801 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:39,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:39,002 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:39,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:39,002 INFO L82 PathProgramCache]: Analyzing trace with hash 708845798, now seen corresponding path program 60 times [2021-07-09 17:59:39,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:39,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119230097] [2021-07-09 17:59:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:39,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:39,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119230097] [2021-07-09 17:59:39,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119230097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:39,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054513200] [2021-07-09 17:59:39,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:39,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:59:39,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:39,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:39,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:39,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:39,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:39,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:39,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 17:59:39,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:39,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:39,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:39,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-07-09 17:59:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:39,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054513200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:39,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:39,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 17:59:39,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963017891] [2021-07-09 17:59:39,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:59:39,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:39,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:59:39,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:59:39,538 INFO L87 Difference]: Start difference. First operand 9261 states and 41830 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:40,200 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-07-09 17:59:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:42,048 INFO L93 Difference]: Finished difference Result 10741 states and 47646 transitions. [2021-07-09 17:59:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 17:59:42,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:42,079 INFO L225 Difference]: With dead ends: 10741 [2021-07-09 17:59:42,079 INFO L226 Difference]: Without dead ends: 10587 [2021-07-09 17:59:42,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1966.0ms TimeCoverageRelationStatistics Valid=542, Invalid=3118, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 17:59:42,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10587 states. [2021-07-09 17:59:42,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10587 to 9264. [2021-07-09 17:59:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9264 states, 9263 states have (on average 4.517542912663284) internal successors, (41846), 9263 states have internal predecessors, (41846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9264 states to 9264 states and 41846 transitions. [2021-07-09 17:59:42,315 INFO L78 Accepts]: Start accepts. Automaton has 9264 states and 41846 transitions. Word has length 30 [2021-07-09 17:59:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:42,315 INFO L482 AbstractCegarLoop]: Abstraction has 9264 states and 41846 transitions. [2021-07-09 17:59:42,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:42,315 INFO L276 IsEmpty]: Start isEmpty. Operand 9264 states and 41846 transitions. [2021-07-09 17:59:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:42,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:42,335 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:42,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:42,536 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:42,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:42,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1096405240, now seen corresponding path program 61 times [2021-07-09 17:59:42,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:42,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290226270] [2021-07-09 17:59:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:42,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:42,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290226270] [2021-07-09 17:59:42,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290226270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:42,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830998331] [2021-07-09 17:59:42,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:42,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:42,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:42,812 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 17:59:42,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:42,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:42,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:42,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:59:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:42,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830998331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:42,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:42,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:59:42,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276351154] [2021-07-09 17:59:42,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:59:42,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:42,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:59:42,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:59:42,891 INFO L87 Difference]: Start difference. First operand 9264 states and 41846 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:45,449 INFO L93 Difference]: Finished difference Result 11749 states and 51741 transitions. [2021-07-09 17:59:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 17:59:45,449 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:45,482 INFO L225 Difference]: With dead ends: 11749 [2021-07-09 17:59:45,483 INFO L226 Difference]: Without dead ends: 11646 [2021-07-09 17:59:45,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1684.3ms TimeCoverageRelationStatistics Valid=583, Invalid=2957, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:59:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11646 states. [2021-07-09 17:59:45,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11646 to 9272. [2021-07-09 17:59:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9272 states, 9271 states have (on average 4.518606407075828) internal successors, (41892), 9271 states have internal predecessors, (41892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9272 states to 9272 states and 41892 transitions. [2021-07-09 17:59:45,715 INFO L78 Accepts]: Start accepts. Automaton has 9272 states and 41892 transitions. Word has length 30 [2021-07-09 17:59:45,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:45,715 INFO L482 AbstractCegarLoop]: Abstraction has 9272 states and 41892 transitions. [2021-07-09 17:59:45,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 9272 states and 41892 transitions. [2021-07-09 17:59:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:45,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:45,733 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:45,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-07-09 17:59:45,934 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash 456788344, now seen corresponding path program 62 times [2021-07-09 17:59:45,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:45,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765095275] [2021-07-09 17:59:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:46,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:46,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765095275] [2021-07-09 17:59:46,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765095275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:46,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854435518] [2021-07-09 17:59:46,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:46,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:59:46,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:46,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:59:46,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:46,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:46,220 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 17:59:46,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:46,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:46,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:46,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:59:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:46,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854435518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:46,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:46,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 17:59:46,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006860003] [2021-07-09 17:59:46,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:59:46,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:46,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:59:46,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:59:46,344 INFO L87 Difference]: Start difference. First operand 9272 states and 41892 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:48,433 INFO L93 Difference]: Finished difference Result 11839 states and 51537 transitions. [2021-07-09 17:59:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 17:59:48,433 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:48,469 INFO L225 Difference]: With dead ends: 11839 [2021-07-09 17:59:48,469 INFO L226 Difference]: Without dead ends: 11764 [2021-07-09 17:59:48,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1464.2ms TimeCoverageRelationStatistics Valid=553, Invalid=3107, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 17:59:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11764 states. [2021-07-09 17:59:48,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11764 to 9272. [2021-07-09 17:59:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9272 states, 9271 states have (on average 4.517851364469852) internal successors, (41885), 9271 states have internal predecessors, (41885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9272 states to 9272 states and 41885 transitions. [2021-07-09 17:59:48,719 INFO L78 Accepts]: Start accepts. Automaton has 9272 states and 41885 transitions. Word has length 30 [2021-07-09 17:59:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:48,719 INFO L482 AbstractCegarLoop]: Abstraction has 9272 states and 41885 transitions. [2021-07-09 17:59:48,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 9272 states and 41885 transitions. [2021-07-09 17:59:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:48,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:48,737 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:48,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-07-09 17:59:48,938 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:48,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:48,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1957586502, now seen corresponding path program 63 times [2021-07-09 17:59:48,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:48,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156134165] [2021-07-09 17:59:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:49,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:49,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156134165] [2021-07-09 17:59:49,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156134165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:49,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979208673] [2021-07-09 17:59:49,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:49,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:59:49,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:49,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:59:49,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:49,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:49,217 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 17:59:49,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:49,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:49,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:49,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:59:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:49,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979208673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:49,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:49,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:59:49,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748977622] [2021-07-09 17:59:49,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:59:49,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:49,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:59:49,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:59:49,362 INFO L87 Difference]: Start difference. First operand 9272 states and 41885 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:52,164 INFO L93 Difference]: Finished difference Result 11742 states and 51677 transitions. [2021-07-09 17:59:52,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 17:59:52,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:52,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:52,200 INFO L225 Difference]: With dead ends: 11742 [2021-07-09 17:59:52,200 INFO L226 Difference]: Without dead ends: 11580 [2021-07-09 17:59:52,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 2037.2ms TimeCoverageRelationStatistics Valid=755, Invalid=4357, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 17:59:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11580 states. [2021-07-09 17:59:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11580 to 9267. [2021-07-09 17:59:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9267 states, 9266 states have (on average 4.518238722210231) internal successors, (41866), 9266 states have internal predecessors, (41866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 41866 transitions. [2021-07-09 17:59:52,449 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 41866 transitions. Word has length 30 [2021-07-09 17:59:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:52,449 INFO L482 AbstractCegarLoop]: Abstraction has 9267 states and 41866 transitions. [2021-07-09 17:59:52,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 41866 transitions. [2021-07-09 17:59:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:52,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:52,468 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:52,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:52,668 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:52,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:52,669 INFO L82 PathProgramCache]: Analyzing trace with hash -95445832, now seen corresponding path program 64 times [2021-07-09 17:59:52,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:52,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649320318] [2021-07-09 17:59:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:52,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:52,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649320318] [2021-07-09 17:59:52,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649320318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:52,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770710376] [2021-07-09 17:59:52,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:52,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:59:52,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:52,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:52,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:52,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:59:52,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:52,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:52,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:52,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:59:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:53,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770710376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:53,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:53,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:59:53,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853771001] [2021-07-09 17:59:53,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:59:53,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:53,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:59:53,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:59:53,021 INFO L87 Difference]: Start difference. First operand 9267 states and 41866 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:56,724 INFO L93 Difference]: Finished difference Result 13289 states and 57768 transitions. [2021-07-09 17:59:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 17:59:56,724 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:59:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:56,767 INFO L225 Difference]: With dead ends: 13289 [2021-07-09 17:59:56,768 INFO L226 Difference]: Without dead ends: 13123 [2021-07-09 17:59:56,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 2561.7ms TimeCoverageRelationStatistics Valid=1125, Invalid=6185, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 17:59:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13123 states. [2021-07-09 17:59:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13123 to 9283. [2021-07-09 17:59:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9283 states, 9282 states have (on average 4.518099547511312) internal successors, (41937), 9282 states have internal predecessors, (41937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9283 states to 9283 states and 41937 transitions. [2021-07-09 17:59:57,040 INFO L78 Accepts]: Start accepts. Automaton has 9283 states and 41937 transitions. Word has length 30 [2021-07-09 17:59:57,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:57,040 INFO L482 AbstractCegarLoop]: Abstraction has 9283 states and 41937 transitions. [2021-07-09 17:59:57,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 9283 states and 41937 transitions. [2021-07-09 17:59:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:59:57,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:57,059 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:57,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-07-09 17:59:57,259 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash -731912686, now seen corresponding path program 65 times [2021-07-09 17:59:57,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:57,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562332513] [2021-07-09 17:59:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:57,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:57,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562332513] [2021-07-09 17:59:57,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562332513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:57,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199297765] [2021-07-09 17:59:57,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:57,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:59:57,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:57,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:57,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:57,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17:59:57,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:57,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:57,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:57,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 17:59:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:57,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199297765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:57,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:57,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:59:57,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121388632] [2021-07-09 17:59:57,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:59:57,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:57,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:59:57,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:59:57,690 INFO L87 Difference]: Start difference. First operand 9283 states and 41937 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:00,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:00,702 INFO L93 Difference]: Finished difference Result 13221 states and 57333 transitions. [2021-07-09 18:00:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:00:00,702 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:00,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:00,742 INFO L225 Difference]: With dead ends: 13221 [2021-07-09 18:00:00,742 INFO L226 Difference]: Without dead ends: 13140 [2021-07-09 18:00:00,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 2162.9ms TimeCoverageRelationStatistics Valid=1085, Invalid=5721, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:00:00,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13140 states. [2021-07-09 18:00:01,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13140 to 9266. [2021-07-09 18:00:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9266 states, 9265 states have (on average 4.518078791149487) internal successors, (41860), 9265 states have internal predecessors, (41860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9266 states to 9266 states and 41860 transitions. [2021-07-09 18:00:01,052 INFO L78 Accepts]: Start accepts. Automaton has 9266 states and 41860 transitions. Word has length 30 [2021-07-09 18:00:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:01,052 INFO L482 AbstractCegarLoop]: Abstraction has 9266 states and 41860 transitions. [2021-07-09 18:00:01,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 9266 states and 41860 transitions. [2021-07-09 18:00:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:01,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:01,071 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:01,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:01,272 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1293295150, now seen corresponding path program 28 times [2021-07-09 18:00:01,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:01,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421962901] [2021-07-09 18:00:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:01,466 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 18:00:01,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:01,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421962901] [2021-07-09 18:00:01,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421962901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:01,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668947408] [2021-07-09 18:00:01,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:01,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:00:01,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:01,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:01,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:01,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:01,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:01,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:01,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-07-09 18:00:01,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:01,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:01,703 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 18:00:01,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-07-09 18:00:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:01,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668947408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:01,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:01,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 18:00:01,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685788921] [2021-07-09 18:00:01,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:00:01,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:01,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:00:01,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:00:01,734 INFO L87 Difference]: Start difference. First operand 9266 states and 41860 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:03,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:03,341 INFO L93 Difference]: Finished difference Result 11779 states and 51038 transitions. [2021-07-09 18:00:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:00:03,342 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:03,381 INFO L225 Difference]: With dead ends: 11779 [2021-07-09 18:00:03,381 INFO L226 Difference]: Without dead ends: 11662 [2021-07-09 18:00:03,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 886.6ms TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:00:03,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11662 states. [2021-07-09 18:00:03,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11662 to 9311. [2021-07-09 18:00:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9311 states, 9310 states have (on average 4.51890440386681) internal successors, (42071), 9310 states have internal predecessors, (42071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9311 states to 9311 states and 42071 transitions. [2021-07-09 18:00:03,637 INFO L78 Accepts]: Start accepts. Automaton has 9311 states and 42071 transitions. Word has length 30 [2021-07-09 18:00:03,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:03,637 INFO L482 AbstractCegarLoop]: Abstraction has 9311 states and 42071 transitions. [2021-07-09 18:00:03,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 9311 states and 42071 transitions. [2021-07-09 18:00:03,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:03,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:03,657 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:03,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-07-09 18:00:03,857 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:03,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:03,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1108301492, now seen corresponding path program 5 times [2021-07-09 18:00:03,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:03,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75128638] [2021-07-09 18:00:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:04,089 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 18:00:04,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:04,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75128638] [2021-07-09 18:00:04,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75128638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:04,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558174209] [2021-07-09 18:00:04,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:04,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:00:04,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:04,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:04,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:04,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:04,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:04,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:04,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-07-09 18:00:04,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:04,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:04,310 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 18:00:04,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-07-09 18:00:04,337 INFO 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 18:00:04,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558174209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:04,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:04,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 18:00:04,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051613244] [2021-07-09 18:00:04,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:00:04,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:04,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:00:04,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:00:04,338 INFO L87 Difference]: Start difference. First operand 9311 states and 42071 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:05,070 INFO L93 Difference]: Finished difference Result 10177 states and 45497 transitions. [2021-07-09 18:00:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:00:05,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:05,100 INFO L225 Difference]: With dead ends: 10177 [2021-07-09 18:00:05,101 INFO L226 Difference]: Without dead ends: 9971 [2021-07-09 18:00:05,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 472.9ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:00:05,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9971 states. [2021-07-09 18:00:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9971 to 9340. [2021-07-09 18:00:05,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9340 states, 9339 states have (on average 4.515686904379484) internal successors, (42172), 9339 states have internal predecessors, (42172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:05,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9340 states to 9340 states and 42172 transitions. [2021-07-09 18:00:05,328 INFO L78 Accepts]: Start accepts. Automaton has 9340 states and 42172 transitions. Word has length 30 [2021-07-09 18:00:05,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:05,328 INFO L482 AbstractCegarLoop]: Abstraction has 9340 states and 42172 transitions. [2021-07-09 18:00:05,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:05,329 INFO L276 IsEmpty]: Start isEmpty. Operand 9340 states and 42172 transitions. [2021-07-09 18:00:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:05,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:05,349 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:05,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:05,550 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:05,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:05,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2026530574, now seen corresponding path program 29 times [2021-07-09 18:00:05,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:05,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261699709] [2021-07-09 18:00:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:05,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:05,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261699709] [2021-07-09 18:00:05,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261699709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:05,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074438117] [2021-07-09 18:00:05,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:05,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:00:05,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:05,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:05,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:05,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:05,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:05,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:00:05,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:05,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:05,934 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 18:00:05,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:00:05,982 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 18:00:05,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074438117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:05,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:05,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 18:00:05,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640439380] [2021-07-09 18:00:05,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:00:05,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:05,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:00:05,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:00:05,983 INFO L87 Difference]: Start difference. First operand 9340 states and 42172 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:07,259 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-07-09 18:00:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:07,300 INFO L93 Difference]: Finished difference Result 10870 states and 47950 transitions. [2021-07-09 18:00:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:00:07,300 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:07,332 INFO L225 Difference]: With dead ends: 10870 [2021-07-09 18:00:07,333 INFO L226 Difference]: Without dead ends: 10710 [2021-07-09 18:00:07,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 970.2ms TimeCoverageRelationStatistics Valid=265, Invalid=1295, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:00:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2021-07-09 18:00:07,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 9399. [2021-07-09 18:00:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 9398 states have (on average 4.519046605660779) internal successors, (42470), 9398 states have internal predecessors, (42470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 42470 transitions. [2021-07-09 18:00:07,560 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 42470 transitions. Word has length 30 [2021-07-09 18:00:07,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:07,561 INFO L482 AbstractCegarLoop]: Abstraction has 9399 states and 42470 transitions. [2021-07-09 18:00:07,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:07,561 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 42470 transitions. [2021-07-09 18:00:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:07,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:07,580 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:07,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable626 [2021-07-09 18:00:07,780 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:07,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1713004178, now seen corresponding path program 30 times [2021-07-09 18:00:07,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:07,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099792671] [2021-07-09 18:00:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:07,973 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 18:00:07,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:07,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099792671] [2021-07-09 18:00:07,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099792671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:07,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475729642] [2021-07-09 18:00:07,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:08,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:00:08,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:08,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:00:08,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:08,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:08,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:08,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 18:00:08,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:08,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:08,189 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 18:00:08,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-07-09 18:00:08,357 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 18:00:08,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475729642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:08,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:08,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:00:08,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515999343] [2021-07-09 18:00:08,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:00:08,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:08,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:00:08,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:00:08,358 INFO L87 Difference]: Start difference. First operand 9399 states and 42470 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:11,227 INFO L93 Difference]: Finished difference Result 10543 states and 46799 transitions. [2021-07-09 18:00:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:00:11,227 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:11,258 INFO L225 Difference]: With dead ends: 10543 [2021-07-09 18:00:11,258 INFO L226 Difference]: Without dead ends: 10255 [2021-07-09 18:00:11,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2288.9ms TimeCoverageRelationStatistics Valid=548, Invalid=3112, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:00:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10255 states. [2021-07-09 18:00:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10255 to 9406. [2021-07-09 18:00:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9406 states, 9405 states have (on average 4.5155768208399785) internal successors, (42469), 9405 states have internal predecessors, (42469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9406 states to 9406 states and 42469 transitions. [2021-07-09 18:00:11,491 INFO L78 Accepts]: Start accepts. Automaton has 9406 states and 42469 transitions. Word has length 30 [2021-07-09 18:00:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:11,492 INFO L482 AbstractCegarLoop]: Abstraction has 9406 states and 42469 transitions. [2021-07-09 18:00:11,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 9406 states and 42469 transitions. [2021-07-09 18:00:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:11,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:11,511 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:11,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:11,712 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash -401773108, now seen corresponding path program 6 times [2021-07-09 18:00:11,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:11,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074490427] [2021-07-09 18:00:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:11,838 INFO 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 18:00:11,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:11,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074490427] [2021-07-09 18:00:11,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074490427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:11,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813004450] [2021-07-09 18:00:11,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:11,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:00:11,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:11,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:00:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:12,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:12,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:12,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:12,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-07-09 18:00:12,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:12,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:12,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:00:12,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:40, output treesize:177 [2021-07-09 18:00:12,233 INFO 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 18:00:12,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813004450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:12,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:12,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-07-09 18:00:12,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471972524] [2021-07-09 18:00:12,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:00:12,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:00:12,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:00:12,234 INFO L87 Difference]: Start difference. First operand 9406 states and 42469 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:14,670 INFO L93 Difference]: Finished difference Result 11554 states and 51382 transitions. [2021-07-09 18:00:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:00:14,671 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:14,703 INFO L225 Difference]: With dead ends: 11554 [2021-07-09 18:00:14,703 INFO L226 Difference]: Without dead ends: 11326 [2021-07-09 18:00:14,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1384.1ms TimeCoverageRelationStatistics Valid=319, Invalid=2873, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:00:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11326 states. [2021-07-09 18:00:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11326 to 9470. [2021-07-09 18:00:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9470 states, 9469 states have (on average 4.523603337205619) internal successors, (42834), 9469 states have internal predecessors, (42834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9470 states to 9470 states and 42834 transitions. [2021-07-09 18:00:14,949 INFO L78 Accepts]: Start accepts. Automaton has 9470 states and 42834 transitions. Word has length 30 [2021-07-09 18:00:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:14,949 INFO L482 AbstractCegarLoop]: Abstraction has 9470 states and 42834 transitions. [2021-07-09 18:00:14,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 9470 states and 42834 transitions. [2021-07-09 18:00:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:14,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:14,969 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:15,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-07-09 18:00:15,170 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:15,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1927988576, now seen corresponding path program 68 times [2021-07-09 18:00:15,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:15,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054453670] [2021-07-09 18:00:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:15,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:15,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054453670] [2021-07-09 18:00:15,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054453670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:15,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89433830] [2021-07-09 18:00:15,461 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 18:00:15,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:15,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:15,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:00:15,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:15,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:15,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:15,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:15,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-09 18:00:15,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:15,883 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-09 18:00:15,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:15,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-09 18:00:15,936 INFO 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 18:00:15,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89433830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:15,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:15,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:00:15,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535650081] [2021-07-09 18:00:15,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:00:15,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:15,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:00:15,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:00:15,937 INFO L87 Difference]: Start difference. First operand 9470 states and 42834 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:17,430 INFO L93 Difference]: Finished difference Result 10017 states and 44899 transitions. [2021-07-09 18:00:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:00:17,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:17,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:17,460 INFO L225 Difference]: With dead ends: 10017 [2021-07-09 18:00:17,460 INFO L226 Difference]: Without dead ends: 9877 [2021-07-09 18:00:17,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1010.5ms TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:00:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9877 states. [2021-07-09 18:00:17,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9877 to 9475. [2021-07-09 18:00:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9475 states, 9474 states have (on average 4.522799240025332) internal successors, (42849), 9474 states have internal predecessors, (42849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:17,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9475 states to 9475 states and 42849 transitions. [2021-07-09 18:00:17,749 INFO L78 Accepts]: Start accepts. Automaton has 9475 states and 42849 transitions. Word has length 30 [2021-07-09 18:00:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:17,749 INFO L482 AbstractCegarLoop]: Abstraction has 9475 states and 42849 transitions. [2021-07-09 18:00:17,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 9475 states and 42849 transitions. [2021-07-09 18:00:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:17,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:17,770 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:17,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:17,971 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:17,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1662609756, now seen corresponding path program 69 times [2021-07-09 18:00:17,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:17,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5895808] [2021-07-09 18:00:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:18,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:18,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5895808] [2021-07-09 18:00:18,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5895808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:18,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933035027] [2021-07-09 18:00:18,223 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 18:00:18,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:00:18,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:18,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:00:18,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:18,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:18,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:18,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 18:00:18,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:18,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:18,475 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 18:00:18,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-07-09 18:00:18,678 INFO 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 18:00:18,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933035027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:18,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:18,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:00:18,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570044479] [2021-07-09 18:00:18,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:00:18,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:18,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:00:18,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:00:18,679 INFO L87 Difference]: Start difference. First operand 9475 states and 42849 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:20,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:20,997 INFO L93 Difference]: Finished difference Result 10043 states and 44948 transitions. [2021-07-09 18:00:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:00:20,997 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:20,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:21,030 INFO L225 Difference]: With dead ends: 10043 [2021-07-09 18:00:21,030 INFO L226 Difference]: Without dead ends: 9880 [2021-07-09 18:00:21,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1777.9ms TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:00:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9880 states. [2021-07-09 18:00:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9880 to 9484. [2021-07-09 18:00:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9484 states, 9483 states have (on average 4.522619424232838) internal successors, (42888), 9483 states have internal predecessors, (42888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9484 states to 9484 states and 42888 transitions. [2021-07-09 18:00:21,334 INFO L78 Accepts]: Start accepts. Automaton has 9484 states and 42888 transitions. Word has length 30 [2021-07-09 18:00:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:21,334 INFO L482 AbstractCegarLoop]: Abstraction has 9484 states and 42888 transitions. [2021-07-09 18:00:21,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:21,335 INFO L276 IsEmpty]: Start isEmpty. Operand 9484 states and 42888 transitions. [2021-07-09 18:00:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:21,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:21,355 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:21,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-07-09 18:00:21,556 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:21,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2099600558, now seen corresponding path program 70 times [2021-07-09 18:00:21,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:21,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523653898] [2021-07-09 18:00:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:21,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:21,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523653898] [2021-07-09 18:00:21,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523653898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:21,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954996311] [2021-07-09 18:00:21,794 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 18:00:21,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:00:21,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:21,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:21,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:21,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:22,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:22,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:00:22,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:22,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:22,011 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 18:00:22,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:00:22,046 INFO 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 18:00:22,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954996311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:22,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:22,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-07-09 18:00:22,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332004445] [2021-07-09 18:00:22,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:00:22,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:22,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:00:22,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:00:22,047 INFO L87 Difference]: Start difference. First operand 9484 states and 42888 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:23,146 INFO L93 Difference]: Finished difference Result 9980 states and 44784 transitions. [2021-07-09 18:00:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:00:23,146 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:23,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:23,176 INFO L225 Difference]: With dead ends: 9980 [2021-07-09 18:00:23,177 INFO L226 Difference]: Without dead ends: 9868 [2021-07-09 18:00:23,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 799.3ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:00:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2021-07-09 18:00:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 9490. [2021-07-09 18:00:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9490 states, 9489 states have (on average 4.522183580988513) internal successors, (42911), 9489 states have internal predecessors, (42911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:23,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9490 states to 9490 states and 42911 transitions. [2021-07-09 18:00:23,411 INFO L78 Accepts]: Start accepts. Automaton has 9490 states and 42911 transitions. Word has length 30 [2021-07-09 18:00:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:23,411 INFO L482 AbstractCegarLoop]: Abstraction has 9490 states and 42911 transitions. [2021-07-09 18:00:23,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9490 states and 42911 transitions. [2021-07-09 18:00:23,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:23,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:23,430 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:23,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-07-09 18:00:23,631 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1581275744, now seen corresponding path program 7 times [2021-07-09 18:00:23,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:23,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203352368] [2021-07-09 18:00:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:23,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:23,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203352368] [2021-07-09 18:00:23,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203352368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:23,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903975963] [2021-07-09 18:00:23,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:00:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:23,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:23,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:23,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:23,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:23,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:23,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:00:23,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:23,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:23,983 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 18:00:23,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:00:24,020 INFO 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 18:00:24,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903975963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:24,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:24,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-09 18:00:24,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793973222] [2021-07-09 18:00:24,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:00:24,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:24,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:00:24,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:00:24,021 INFO L87 Difference]: Start difference. First operand 9490 states and 42911 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:24,652 INFO L93 Difference]: Finished difference Result 9988 states and 44749 transitions. [2021-07-09 18:00:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:00:24,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:24,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:24,684 INFO L225 Difference]: With dead ends: 9988 [2021-07-09 18:00:24,684 INFO L226 Difference]: Without dead ends: 9787 [2021-07-09 18:00:24,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:00:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9787 states. [2021-07-09 18:00:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9787 to 9501. [2021-07-09 18:00:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9501 states, 9500 states have (on average 4.52178947368421) internal successors, (42957), 9500 states have internal predecessors, (42957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:24,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9501 states to 9501 states and 42957 transitions. [2021-07-09 18:00:24,920 INFO L78 Accepts]: Start accepts. Automaton has 9501 states and 42957 transitions. Word has length 30 [2021-07-09 18:00:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:24,920 INFO L482 AbstractCegarLoop]: Abstraction has 9501 states and 42957 transitions. [2021-07-09 18:00:24,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:24,921 INFO L276 IsEmpty]: Start isEmpty. Operand 9501 states and 42957 transitions. [2021-07-09 18:00:24,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:24,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:24,940 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:25,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-07-09 18:00:25,141 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:25,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:25,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1667325488, now seen corresponding path program 66 times [2021-07-09 18:00:25,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:25,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715573069] [2021-07-09 18:00:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:25,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:25,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715573069] [2021-07-09 18:00:25,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715573069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:25,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519580257] [2021-07-09 18:00:25,328 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 18:00:25,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:00:25,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:25,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:25,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:25,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:25,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:25,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:25,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:00:25,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:25,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:25,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:25,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:00:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:25,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519580257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:25,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:25,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 18:00:25,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087852823] [2021-07-09 18:00:25,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:00:25,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:25,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:00:25,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:00:25,572 INFO L87 Difference]: Start difference. First operand 9501 states and 42957 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:26,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:26,481 INFO L93 Difference]: Finished difference Result 9890 states and 44449 transitions. [2021-07-09 18:00:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:00:26,481 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:26,508 INFO L225 Difference]: With dead ends: 9890 [2021-07-09 18:00:26,509 INFO L226 Difference]: Without dead ends: 9792 [2021-07-09 18:00:26,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:00:26,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2021-07-09 18:00:26,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 9513. [2021-07-09 18:00:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9513 states, 9512 states have (on average 4.521131202691337) internal successors, (43005), 9512 states have internal predecessors, (43005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9513 states to 9513 states and 43005 transitions. [2021-07-09 18:00:26,714 INFO L78 Accepts]: Start accepts. Automaton has 9513 states and 43005 transitions. Word has length 30 [2021-07-09 18:00:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:26,714 INFO L482 AbstractCegarLoop]: Abstraction has 9513 states and 43005 transitions. [2021-07-09 18:00:26,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 9513 states and 43005 transitions. [2021-07-09 18:00:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:26,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:26,732 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:26,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-07-09 18:00:26,933 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:26,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2007157742, now seen corresponding path program 67 times [2021-07-09 18:00:26,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:26,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687560834] [2021-07-09 18:00:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:27,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:27,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687560834] [2021-07-09 18:00:27,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687560834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:27,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985741869] [2021-07-09 18:00:27,109 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 18:00:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:27,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:27,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:27,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:27,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:00:27,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:27,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:27,401 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 18:00:27,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:00:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:27,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985741869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:27,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:27,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-09 18:00:27,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108556609] [2021-07-09 18:00:27,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:00:27,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:27,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:00:27,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:00:27,431 INFO L87 Difference]: Start difference. First operand 9513 states and 43005 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:28,175 INFO L93 Difference]: Finished difference Result 9862 states and 44321 transitions. [2021-07-09 18:00:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:00:28,175 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:28,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:28,202 INFO L225 Difference]: With dead ends: 9862 [2021-07-09 18:00:28,202 INFO L226 Difference]: Without dead ends: 9770 [2021-07-09 18:00:28,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:00:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9770 states. [2021-07-09 18:00:28,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9770 to 9507. [2021-07-09 18:00:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9507 states, 9506 states have (on average 4.521039343572481) internal successors, (42977), 9506 states have internal predecessors, (42977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9507 states to 9507 states and 42977 transitions. [2021-07-09 18:00:28,406 INFO L78 Accepts]: Start accepts. Automaton has 9507 states and 42977 transitions. Word has length 30 [2021-07-09 18:00:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:28,406 INFO L482 AbstractCegarLoop]: Abstraction has 9507 states and 42977 transitions. [2021-07-09 18:00:28,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 9507 states and 42977 transitions. [2021-07-09 18:00:28,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:28,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:28,426 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:28,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-07-09 18:00:28,627 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:28,627 INFO L82 PathProgramCache]: Analyzing trace with hash 353883056, now seen corresponding path program 68 times [2021-07-09 18:00:28,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:28,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964160481] [2021-07-09 18:00:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:28,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:28,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964160481] [2021-07-09 18:00:28,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964160481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:28,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799416256] [2021-07-09 18:00:28,870 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 18:00:28,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:28,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:28,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:00:28,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:29,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:29,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:29,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:29,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-09 18:00:29,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:29,182 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-09 18:00:29,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:29,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-09 18:00:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:29,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799416256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:29,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:29,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:00:29,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275148335] [2021-07-09 18:00:29,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:00:29,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:29,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:00:29,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:00:29,226 INFO L87 Difference]: Start difference. First operand 9507 states and 42977 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:30,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:30,368 INFO L93 Difference]: Finished difference Result 10123 states and 45333 transitions. [2021-07-09 18:00:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:00:30,369 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:30,397 INFO L225 Difference]: With dead ends: 10123 [2021-07-09 18:00:30,398 INFO L226 Difference]: Without dead ends: 10009 [2021-07-09 18:00:30,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 868.1ms TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:00:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10009 states. [2021-07-09 18:00:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10009 to 9506. [2021-07-09 18:00:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9506 states, 9505 states have (on average 4.521199368753288) internal successors, (42974), 9505 states have internal predecessors, (42974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:30,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9506 states to 9506 states and 42974 transitions. [2021-07-09 18:00:30,663 INFO L78 Accepts]: Start accepts. Automaton has 9506 states and 42974 transitions. Word has length 30 [2021-07-09 18:00:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:30,663 INFO L482 AbstractCegarLoop]: Abstraction has 9506 states and 42974 transitions. [2021-07-09 18:00:30,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 9506 states and 42974 transitions. [2021-07-09 18:00:30,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:30,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:30,682 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:30,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:30,882 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:30,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1932960114, now seen corresponding path program 71 times [2021-07-09 18:00:30,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:30,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833780207] [2021-07-09 18:00:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:31,079 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 18:00:31,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:31,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833780207] [2021-07-09 18:00:31,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833780207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:31,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391628082] [2021-07-09 18:00:31,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:31,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:00:31,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:31,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:31,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:31,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:31,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:31,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-07-09 18:00:31,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:31,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:31,345 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 18:00:31,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-07-09 18:00:31,397 INFO 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 18:00:31,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391628082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:31,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:31,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:00:31,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411689646] [2021-07-09 18:00:31,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:00:31,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:00:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:00:31,398 INFO L87 Difference]: Start difference. First operand 9506 states and 42974 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:33,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:33,055 INFO L93 Difference]: Finished difference Result 10440 states and 46653 transitions. [2021-07-09 18:00:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:00:33,056 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:33,087 INFO L225 Difference]: With dead ends: 10440 [2021-07-09 18:00:33,087 INFO L226 Difference]: Without dead ends: 10335 [2021-07-09 18:00:33,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 986.5ms TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:00:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10335 states. [2021-07-09 18:00:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10335 to 9514. [2021-07-09 18:00:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9514 states, 9513 states have (on average 4.520971302428256) internal successors, (43008), 9513 states have internal predecessors, (43008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9514 states to 9514 states and 43008 transitions. [2021-07-09 18:00:33,343 INFO L78 Accepts]: Start accepts. Automaton has 9514 states and 43008 transitions. Word has length 30 [2021-07-09 18:00:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:33,343 INFO L482 AbstractCegarLoop]: Abstraction has 9514 states and 43008 transitions. [2021-07-09 18:00:33,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 9514 states and 43008 transitions. [2021-07-09 18:00:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:33,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:33,457 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:33,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-07-09 18:00:33,658 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:33,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2117953772, now seen corresponding path program 69 times [2021-07-09 18:00:33,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:33,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499610032] [2021-07-09 18:00:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:33,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:33,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499610032] [2021-07-09 18:00:33,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499610032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:33,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550769517] [2021-07-09 18:00:33,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:33,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:00:33,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:33,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:33,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:34,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:34,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:34,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:34,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-07-09 18:00:34,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:34,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:34,105 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 18:00:34,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-07-09 18:00:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:34,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550769517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:34,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:34,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-09 18:00:34,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877599767] [2021-07-09 18:00:34,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:00:34,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:34,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:00:34,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:00:34,135 INFO L87 Difference]: Start difference. First operand 9514 states and 43008 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:35,760 INFO L93 Difference]: Finished difference Result 11453 states and 50137 transitions. [2021-07-09 18:00:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:00:35,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:35,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:35,793 INFO L225 Difference]: With dead ends: 11453 [2021-07-09 18:00:35,794 INFO L226 Difference]: Without dead ends: 11329 [2021-07-09 18:00:35,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 994.6ms TimeCoverageRelationStatistics Valid=266, Invalid=1714, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:00:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11329 states. [2021-07-09 18:00:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11329 to 9528. [2021-07-09 18:00:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9528 states, 9527 states have (on average 4.520520625590427) internal successors, (43067), 9527 states have internal predecessors, (43067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9528 states to 9528 states and 43067 transitions. [2021-07-09 18:00:36,027 INFO L78 Accepts]: Start accepts. Automaton has 9528 states and 43067 transitions. Word has length 30 [2021-07-09 18:00:36,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:36,027 INFO L482 AbstractCegarLoop]: Abstraction has 9528 states and 43067 transitions. [2021-07-09 18:00:36,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 9528 states and 43067 transitions. [2021-07-09 18:00:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:36,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:36,046 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:36,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable656,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:36,247 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:36,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1068030562, now seen corresponding path program 72 times [2021-07-09 18:00:36,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:36,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649751923] [2021-07-09 18:00:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:36,444 INFO 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 18:00:36,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:36,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649751923] [2021-07-09 18:00:36,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649751923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:36,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204813532] [2021-07-09 18:00:36,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:36,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:00:36,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:36,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:00:36,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:36,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:36,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:36,663 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 22 treesize of output 56 [2021-07-09 18:00:36,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:00:36,868 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-07-09 18:00:36,868 INFO L628 ElimStorePlain]: treesize reduction 67, result has 54.1 percent of original size [2021-07-09 18:00:36,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:36,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:79 [2021-07-09 18:00:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:37,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204813532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:37,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:37,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 18:00:37,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474571482] [2021-07-09 18:00:37,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:00:37,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:37,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:00:37,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:00:37,133 INFO L87 Difference]: Start difference. First operand 9528 states and 43067 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:37,856 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-07-09 18:00:38,530 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2021-07-09 18:00:39,974 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-09 18:00:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:40,663 INFO L93 Difference]: Finished difference Result 10719 states and 47595 transitions. [2021-07-09 18:00:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:00:40,663 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:40,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:40,695 INFO L225 Difference]: With dead ends: 10719 [2021-07-09 18:00:40,695 INFO L226 Difference]: Without dead ends: 10495 [2021-07-09 18:00:40,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2592.2ms TimeCoverageRelationStatistics Valid=372, Invalid=3660, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:00:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-07-09 18:00:40,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 9524. [2021-07-09 18:00:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 4.520634253911583) internal successors, (43050), 9523 states have internal predecessors, (43050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 43050 transitions. [2021-07-09 18:00:40,991 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 43050 transitions. Word has length 30 [2021-07-09 18:00:40,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:40,992 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 43050 transitions. [2021-07-09 18:00:40,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 43050 transitions. [2021-07-09 18:00:41,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:41,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:41,013 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:41,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-07-09 18:00:41,213 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:41,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:41,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1222272674, now seen corresponding path program 73 times [2021-07-09 18:00:41,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:41,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743035301] [2021-07-09 18:00:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:41,410 INFO 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 18:00:41,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:41,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743035301] [2021-07-09 18:00:41,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743035301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:41,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755427930] [2021-07-09 18:00:41,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:41,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:41,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:41,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:41,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:41,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:41,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:00:41,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:41,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:41,659 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 18:00:41,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:00:41,697 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 18:00:41,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755427930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:41,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:41,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-09 18:00:41,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272749481] [2021-07-09 18:00:41,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:00:41,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:41,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:00:41,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:00:41,698 INFO L87 Difference]: Start difference. First operand 9524 states and 43050 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:43,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:43,070 INFO L93 Difference]: Finished difference Result 10196 states and 45651 transitions. [2021-07-09 18:00:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:00:43,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:43,108 INFO L225 Difference]: With dead ends: 10196 [2021-07-09 18:00:43,108 INFO L226 Difference]: Without dead ends: 10091 [2021-07-09 18:00:43,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 911.6ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:00:43,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10091 states. [2021-07-09 18:00:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10091 to 9529. [2021-07-09 18:00:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9529 states, 9528 states have (on average 4.520465994962216) internal successors, (43071), 9528 states have internal predecessors, (43071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9529 states to 9529 states and 43071 transitions. [2021-07-09 18:00:43,405 INFO L78 Accepts]: Start accepts. Automaton has 9529 states and 43071 transitions. Word has length 30 [2021-07-09 18:00:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:43,405 INFO L482 AbstractCegarLoop]: Abstraction has 9529 states and 43071 transitions. [2021-07-09 18:00:43,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 9529 states and 43071 transitions. [2021-07-09 18:00:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:43,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:43,429 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:43,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-07-09 18:00:43,645 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1460216054, now seen corresponding path program 74 times [2021-07-09 18:00:43,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:43,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146454348] [2021-07-09 18:00:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:43,898 INFO 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 18:00:43,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:43,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146454348] [2021-07-09 18:00:43,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146454348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:43,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170592491] [2021-07-09 18:00:43,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:43,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:43,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:43,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:00:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:44,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:44,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:44,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 18:00:44,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:44,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:44,184 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 18:00:44,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-07-09 18:00:44,496 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-07-09 18:00:44,607 INFO 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 18:00:44,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170592491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:44,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:44,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:00:44,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123458238] [2021-07-09 18:00:44,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:00:44,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:44,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:00:44,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:00:44,609 INFO L87 Difference]: Start difference. First operand 9529 states and 43071 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:47,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:47,087 INFO L93 Difference]: Finished difference Result 10251 states and 45785 transitions. [2021-07-09 18:00:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:00:47,088 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:47,125 INFO L225 Difference]: With dead ends: 10251 [2021-07-09 18:00:47,125 INFO L226 Difference]: Without dead ends: 10099 [2021-07-09 18:00:47,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 2063.7ms TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:00:47,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10099 states. [2021-07-09 18:00:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10099 to 9526. [2021-07-09 18:00:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9526 states, 9525 states have (on average 4.52) internal successors, (43053), 9525 states have internal predecessors, (43053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:47,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9526 states to 9526 states and 43053 transitions. [2021-07-09 18:00:47,417 INFO L78 Accepts]: Start accepts. Automaton has 9526 states and 43053 transitions. Word has length 30 [2021-07-09 18:00:47,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:47,417 INFO L482 AbstractCegarLoop]: Abstraction has 9526 states and 43053 transitions. [2021-07-09 18:00:47,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:47,417 INFO L276 IsEmpty]: Start isEmpty. Operand 9526 states and 43053 transitions. [2021-07-09 18:00:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:47,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:47,440 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:47,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-07-09 18:00:47,654 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:47,654 INFO L82 PathProgramCache]: Analyzing trace with hash 603104802, now seen corresponding path program 70 times [2021-07-09 18:00:47,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:47,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129006028] [2021-07-09 18:00:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:47,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:47,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129006028] [2021-07-09 18:00:47,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129006028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:47,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811107607] [2021-07-09 18:00:47,906 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 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 18:00:47,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:00:47,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:47,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:47,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:48,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:48,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:48,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:48,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:00:48,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:48,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:48,152 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 18:00:48,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:00:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:48,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811107607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:48,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:48,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-09 18:00:48,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223773908] [2021-07-09 18:00:48,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:00:48,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:48,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:00:48,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:00:48,188 INFO L87 Difference]: Start difference. First operand 9526 states and 43053 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:49,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:49,942 INFO L93 Difference]: Finished difference Result 11829 states and 52009 transitions. [2021-07-09 18:00:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:00:49,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:49,975 INFO L225 Difference]: With dead ends: 11829 [2021-07-09 18:00:49,976 INFO L226 Difference]: Without dead ends: 11729 [2021-07-09 18:00:49,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1207.7ms TimeCoverageRelationStatistics Valid=326, Invalid=1654, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:00:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11729 states. [2021-07-09 18:00:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11729 to 9560. [2021-07-09 18:00:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9560 states, 9559 states have (on average 4.520974997384664) internal successors, (43216), 9559 states have internal predecessors, (43216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:50,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9560 states to 9560 states and 43216 transitions. [2021-07-09 18:00:50,223 INFO L78 Accepts]: Start accepts. Automaton has 9560 states and 43216 transitions. Word has length 30 [2021-07-09 18:00:50,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:50,223 INFO L482 AbstractCegarLoop]: Abstraction has 9560 states and 43216 transitions. [2021-07-09 18:00:50,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:50,223 INFO L276 IsEmpty]: Start isEmpty. Operand 9560 states and 43216 transitions. [2021-07-09 18:00:50,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:50,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:50,243 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:50,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:50,444 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:50,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1925833962, now seen corresponding path program 71 times [2021-07-09 18:00:50,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:50,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790534714] [2021-07-09 18:00:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:50,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:50,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790534714] [2021-07-09 18:00:50,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790534714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:50,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765808987] [2021-07-09 18:00:50,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:50,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:00:50,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:50,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:50,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:50,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:50,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:50,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:50,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:00:50,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:50,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:50,911 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 18:00:50,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:00:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:50,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765808987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:50,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:50,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-09 18:00:50,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660482869] [2021-07-09 18:00:50,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:00:50,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:00:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:00:50,951 INFO L87 Difference]: Start difference. First operand 9560 states and 43216 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:53,033 INFO L93 Difference]: Finished difference Result 12084 states and 52842 transitions. [2021-07-09 18:00:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:00:53,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:53,068 INFO L225 Difference]: With dead ends: 12084 [2021-07-09 18:00:53,068 INFO L226 Difference]: Without dead ends: 11991 [2021-07-09 18:00:53,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1223.6ms TimeCoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:00:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11991 states. [2021-07-09 18:00:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11991 to 9560. [2021-07-09 18:00:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9560 states, 9559 states have (on average 4.519719635945182) internal successors, (43204), 9559 states have internal predecessors, (43204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:53,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9560 states to 9560 states and 43204 transitions. [2021-07-09 18:00:53,318 INFO L78 Accepts]: Start accepts. Automaton has 9560 states and 43204 transitions. Word has length 30 [2021-07-09 18:00:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:53,318 INFO L482 AbstractCegarLoop]: Abstraction has 9560 states and 43204 transitions. [2021-07-09 18:00:53,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 9560 states and 43204 transitions. [2021-07-09 18:00:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:53,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:53,337 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:53,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-07-09 18:00:53,537 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash -726234836, now seen corresponding path program 31 times [2021-07-09 18:00:53,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:53,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466395573] [2021-07-09 18:00:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:53,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:53,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466395573] [2021-07-09 18:00:53,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466395573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:53,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553897578] [2021-07-09 18:00:53,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:53,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:53,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:53,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:53,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:53,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:53,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:00:53,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:53,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:53,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:53,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:00:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:53,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553897578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:53,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:53,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 18:00:53,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341964013] [2021-07-09 18:00:53,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:00:53,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:53,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:00:53,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:00:53,996 INFO L87 Difference]: Start difference. First operand 9560 states and 43204 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:55,649 INFO L93 Difference]: Finished difference Result 10174 states and 45585 transitions. [2021-07-09 18:00:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:00:55,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:55,679 INFO L225 Difference]: With dead ends: 10174 [2021-07-09 18:00:55,679 INFO L226 Difference]: Without dead ends: 10060 [2021-07-09 18:00:55,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1228.9ms TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:00:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10060 states. [2021-07-09 18:00:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10060 to 9578. [2021-07-09 18:00:55,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9578 states, 9577 states have (on average 4.51905607183878) internal successors, (43279), 9577 states have internal predecessors, (43279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9578 states to 9578 states and 43279 transitions. [2021-07-09 18:00:55,893 INFO L78 Accepts]: Start accepts. Automaton has 9578 states and 43279 transitions. Word has length 30 [2021-07-09 18:00:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:55,893 INFO L482 AbstractCegarLoop]: Abstraction has 9578 states and 43279 transitions. [2021-07-09 18:00:55,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand 9578 states and 43279 transitions. [2021-07-09 18:00:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:55,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:55,912 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:56,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-07-09 18:00:56,112 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:56,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:56,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1039761232, now seen corresponding path program 32 times [2021-07-09 18:00:56,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:56,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982270700] [2021-07-09 18:00:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:56,329 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 18:00:56,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:56,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982270700] [2021-07-09 18:00:56,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982270700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:56,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190654303] [2021-07-09 18:00:56,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:56,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:56,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:56,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:00:56,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:56,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:00:56,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:56,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 18:00:56,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:56,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:56,554 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 18:00:56,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-07-09 18:00:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:56,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190654303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:56,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:56,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:00:56,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765405230] [2021-07-09 18:00:56,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:00:56,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:56,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:00:56,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:00:56,747 INFO L87 Difference]: Start difference. First operand 9578 states and 43279 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:59,018 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-07-09 18:00:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:59,217 INFO L93 Difference]: Finished difference Result 10486 states and 46614 transitions. [2021-07-09 18:00:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:00:59,217 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:00:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:59,249 INFO L225 Difference]: With dead ends: 10486 [2021-07-09 18:00:59,250 INFO L226 Difference]: Without dead ends: 10163 [2021-07-09 18:00:59,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 2028.5ms TimeCoverageRelationStatistics Valid=438, Invalid=2424, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:00:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-07-09 18:00:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 9591. [2021-07-09 18:00:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9591 states, 9590 states have (on average 4.518456725755996) internal successors, (43332), 9590 states have internal predecessors, (43332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9591 states to 9591 states and 43332 transitions. [2021-07-09 18:00:59,497 INFO L78 Accepts]: Start accepts. Automaton has 9591 states and 43332 transitions. Word has length 30 [2021-07-09 18:00:59,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:59,497 INFO L482 AbstractCegarLoop]: Abstraction has 9591 states and 43332 transitions. [2021-07-09 18:00:59,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:59,497 INFO L276 IsEmpty]: Start isEmpty. Operand 9591 states and 43332 transitions. [2021-07-09 18:00:59,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:00:59,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:59,517 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:59,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-07-09 18:00:59,718 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:59,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:59,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1146174864, now seen corresponding path program 75 times [2021-07-09 18:00:59,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:59,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273458487] [2021-07-09 18:00:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:59,902 INFO 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 18:00:59,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:59,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273458487] [2021-07-09 18:00:59,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273458487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:59,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736586299] [2021-07-09 18:00:59,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:59,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:00:59,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:59,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:00:59,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:00,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:00,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:00,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:00,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 18:01:00,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:00,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:00,151 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 18:01:00,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-09 18:01:00,193 INFO 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 18:01:00,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736586299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:00,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:00,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:01:00,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059298787] [2021-07-09 18:01:00,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:01:00,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:00,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:01:00,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:01:00,193 INFO L87 Difference]: Start difference. First operand 9591 states and 43332 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:01,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:01,409 INFO L93 Difference]: Finished difference Result 10170 states and 45540 transitions. [2021-07-09 18:01:01,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:01:01,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:01,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:01,440 INFO L225 Difference]: With dead ends: 10170 [2021-07-09 18:01:01,440 INFO L226 Difference]: Without dead ends: 10039 [2021-07-09 18:01:01,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 776.0ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:01:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10039 states. [2021-07-09 18:01:01,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10039 to 9591. [2021-07-09 18:01:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9591 states, 9590 states have (on average 4.518039624608968) internal successors, (43328), 9590 states have internal predecessors, (43328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9591 states to 9591 states and 43328 transitions. [2021-07-09 18:01:01,657 INFO L78 Accepts]: Start accepts. Automaton has 9591 states and 43328 transitions. Word has length 30 [2021-07-09 18:01:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:01,657 INFO L482 AbstractCegarLoop]: Abstraction has 9591 states and 43328 transitions. [2021-07-09 18:01:01,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 9591 states and 43328 transitions. [2021-07-09 18:01:01,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:01,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:01,676 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:01,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:01,877 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:01,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:01,877 INFO L82 PathProgramCache]: Analyzing trace with hash -441805900, now seen corresponding path program 76 times [2021-07-09 18:01:01,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:01,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755805222] [2021-07-09 18:01:01,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:02,020 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-07-09 18:01:02,221 INFO 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 18:01:02,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:02,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755805222] [2021-07-09 18:01:02,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755805222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:02,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469449324] [2021-07-09 18:01:02,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:02,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:02,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:02,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:02,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:02,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:02,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:02,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:01:02,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:02,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:02,438 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 18:01:02,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:01:02,488 INFO 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 18:01:02,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469449324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:02,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:02,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-09 18:01:02,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765026441] [2021-07-09 18:01:02,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:01:02,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:02,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:01:02,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:01:02,489 INFO L87 Difference]: Start difference. First operand 9591 states and 43328 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:03,852 INFO L93 Difference]: Finished difference Result 10094 states and 45231 transitions. [2021-07-09 18:01:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:01:03,852 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:03,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:03,882 INFO L225 Difference]: With dead ends: 10094 [2021-07-09 18:01:03,882 INFO L226 Difference]: Without dead ends: 9979 [2021-07-09 18:01:03,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1085.8ms TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:01:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9979 states. [2021-07-09 18:01:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9979 to 9595. [2021-07-09 18:01:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9595 states, 9594 states have (on average 4.517927871586408) internal successors, (43345), 9594 states have internal predecessors, (43345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9595 states to 9595 states and 43345 transitions. [2021-07-09 18:01:04,105 INFO L78 Accepts]: Start accepts. Automaton has 9595 states and 43345 transitions. Word has length 30 [2021-07-09 18:01:04,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:04,105 INFO L482 AbstractCegarLoop]: Abstraction has 9595 states and 43345 transitions. [2021-07-09 18:01:04,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 9595 states and 43345 transitions. [2021-07-09 18:01:04,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:04,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:04,126 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:04,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:04,327 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:04,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:04,327 INFO L82 PathProgramCache]: Analyzing trace with hash -974562882, now seen corresponding path program 77 times [2021-07-09 18:01:04,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:04,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35998692] [2021-07-09 18:01:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:04,561 INFO 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 18:01:04,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:04,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35998692] [2021-07-09 18:01:04,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35998692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:04,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85005140] [2021-07-09 18:01:04,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:04,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:01:04,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:04,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:04,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:04,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:04,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:04,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:04,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:01:04,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:04,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:04,798 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 18:01:04,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:7 [2021-07-09 18:01:04,839 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 18:01:04,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85005140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:04,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:04,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-09 18:01:04,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646728359] [2021-07-09 18:01:04,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:01:04,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:04,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:01:04,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:01:04,840 INFO L87 Difference]: Start difference. First operand 9595 states and 43345 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:06,221 INFO L93 Difference]: Finished difference Result 9894 states and 44428 transitions. [2021-07-09 18:01:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:01:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:06,254 INFO L225 Difference]: With dead ends: 9894 [2021-07-09 18:01:06,254 INFO L226 Difference]: Without dead ends: 9835 [2021-07-09 18:01:06,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 890.4ms TimeCoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:01:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9835 states. [2021-07-09 18:01:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9835 to 9595. [2021-07-09 18:01:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9595 states, 9594 states have (on average 4.51782363977486) internal successors, (43344), 9594 states have internal predecessors, (43344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9595 states to 9595 states and 43344 transitions. [2021-07-09 18:01:06,488 INFO L78 Accepts]: Start accepts. Automaton has 9595 states and 43344 transitions. Word has length 30 [2021-07-09 18:01:06,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:06,488 INFO L482 AbstractCegarLoop]: Abstraction has 9595 states and 43344 transitions. [2021-07-09 18:01:06,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:06,488 INFO L276 IsEmpty]: Start isEmpty. Operand 9595 states and 43344 transitions. [2021-07-09 18:01:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:06,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:06,508 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:06,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:06,708 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:06,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:06,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1704808642, now seen corresponding path program 78 times [2021-07-09 18:01:06,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:06,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758474390] [2021-07-09 18:01:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:06,972 INFO 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 18:01:06,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:06,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758474390] [2021-07-09 18:01:06,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758474390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:06,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895289784] [2021-07-09 18:01:06,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:07,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:01:07,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:07,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:01:07,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:07,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:07,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:07,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-07-09 18:01:07,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:07,276 INFO L628 ElimStorePlain]: treesize reduction 5, result has 92.2 percent of original size [2021-07-09 18:01:07,296 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 18:01:07,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:469 [2021-07-09 18:01:07,656 INFO 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 18:01:07,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895289784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:07,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:07,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 18:01:07,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536638110] [2021-07-09 18:01:07,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:01:07,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:07,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:01:07,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:01:07,657 INFO L87 Difference]: Start difference. First operand 9595 states and 43344 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:09,200 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-09 18:01:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:10,074 INFO L93 Difference]: Finished difference Result 10637 states and 47291 transitions. [2021-07-09 18:01:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:01:10,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:10,104 INFO L225 Difference]: With dead ends: 10637 [2021-07-09 18:01:10,104 INFO L226 Difference]: Without dead ends: 10514 [2021-07-09 18:01:10,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1828.7ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:01:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10514 states. [2021-07-09 18:01:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10514 to 9632. [2021-07-09 18:01:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9631 states have (on average 4.511577198629426) internal successors, (43451), 9631 states have internal predecessors, (43451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 43451 transitions. [2021-07-09 18:01:10,334 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 43451 transitions. Word has length 30 [2021-07-09 18:01:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:10,334 INFO L482 AbstractCegarLoop]: Abstraction has 9632 states and 43451 transitions. [2021-07-09 18:01:10,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:10,334 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 43451 transitions. [2021-07-09 18:01:10,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:10,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:10,353 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:10,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable682 [2021-07-09 18:01:10,554 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:10,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:10,554 INFO L82 PathProgramCache]: Analyzing trace with hash 211398642, now seen corresponding path program 79 times [2021-07-09 18:01:10,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:10,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907864365] [2021-07-09 18:01:10,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:10,798 INFO 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 18:01:10,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:10,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907864365] [2021-07-09 18:01:10,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907864365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:10,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071494980] [2021-07-09 18:01:10,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:10,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:10,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:10,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:10,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:10,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:10,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:01:10,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:10,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:10,997 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 18:01:10,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:01:11,061 INFO 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 18:01:11,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071494980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:11,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:11,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:01:11,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907922962] [2021-07-09 18:01:11,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:01:11,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:11,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:01:11,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:01:11,062 INFO L87 Difference]: Start difference. First operand 9632 states and 43451 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:12,360 INFO L93 Difference]: Finished difference Result 10132 states and 45350 transitions. [2021-07-09 18:01:12,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:01:12,360 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:12,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:12,390 INFO L225 Difference]: With dead ends: 10132 [2021-07-09 18:01:12,390 INFO L226 Difference]: Without dead ends: 9982 [2021-07-09 18:01:12,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 954.7ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:01:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9982 states. [2021-07-09 18:01:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9982 to 9595. [2021-07-09 18:01:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9595 states, 9594 states have (on average 4.517406712528664) internal successors, (43340), 9594 states have internal predecessors, (43340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9595 states to 9595 states and 43340 transitions. [2021-07-09 18:01:12,615 INFO L78 Accepts]: Start accepts. Automaton has 9595 states and 43340 transitions. Word has length 30 [2021-07-09 18:01:12,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:12,615 INFO L482 AbstractCegarLoop]: Abstraction has 9595 states and 43340 transitions. [2021-07-09 18:01:12,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 9595 states and 43340 transitions. [2021-07-09 18:01:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:12,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:12,635 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] [2021-07-09 18:01:12,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:12,836 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:12,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:12,836 INFO L82 PathProgramCache]: Analyzing trace with hash 740206354, now seen corresponding path program 33 times [2021-07-09 18:01:12,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:12,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785416550] [2021-07-09 18:01:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:13,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:13,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785416550] [2021-07-09 18:01:13,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785416550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:13,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549184814] [2021-07-09 18:01:13,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:13,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:01:13,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:13,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:01:13,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:13,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:13,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:13,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-07-09 18:01:13,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:01:13,324 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-07-09 18:01:13,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:01:13,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:111 [2021-07-09 18:01:13,485 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 18:01:13,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549184814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:13,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:13,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:01:13,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928402868] [2021-07-09 18:01:13,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:01:13,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:13,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:01:13,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:01:13,486 INFO L87 Difference]: Start difference. First operand 9595 states and 43340 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:13,843 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-07-09 18:01:15,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:15,824 INFO L93 Difference]: Finished difference Result 10624 states and 47167 transitions. [2021-07-09 18:01:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:01:15,825 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:15,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:15,860 INFO L225 Difference]: With dead ends: 10624 [2021-07-09 18:01:15,861 INFO L226 Difference]: Without dead ends: 10342 [2021-07-09 18:01:15,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1653.9ms TimeCoverageRelationStatistics Valid=345, Invalid=2007, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:01:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10342 states. [2021-07-09 18:01:16,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10342 to 9614. [2021-07-09 18:01:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9614 states, 9613 states have (on average 4.516800166441278) internal successors, (43420), 9613 states have internal predecessors, (43420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9614 states to 9614 states and 43420 transitions. [2021-07-09 18:01:16,080 INFO L78 Accepts]: Start accepts. Automaton has 9614 states and 43420 transitions. Word has length 30 [2021-07-09 18:01:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:16,081 INFO L482 AbstractCegarLoop]: Abstraction has 9614 states and 43420 transitions. [2021-07-09 18:01:16,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:16,081 INFO L276 IsEmpty]: Start isEmpty. Operand 9614 states and 43420 transitions. [2021-07-09 18:01:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:16,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:16,101 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:16,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:16,302 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:16,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:16,302 INFO L82 PathProgramCache]: Analyzing trace with hash -824776834, now seen corresponding path program 80 times [2021-07-09 18:01:16,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:16,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881323188] [2021-07-09 18:01:16,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:16,496 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 18:01:16,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:16,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881323188] [2021-07-09 18:01:16,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881323188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:16,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287140663] [2021-07-09 18:01:16,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:16,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:16,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:01:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:16,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:16,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:16,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:16,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-09 18:01:16,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:16,830 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-09 18:01:16,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:16,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-09 18:01:16,875 INFO 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 18:01:16,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287140663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:16,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:16,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:01:16,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736900445] [2021-07-09 18:01:16,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:01:16,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:16,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:01:16,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:16,876 INFO L87 Difference]: Start difference. First operand 9614 states and 43420 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:18,118 INFO L93 Difference]: Finished difference Result 10163 states and 45472 transitions. [2021-07-09 18:01:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:01:18,119 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:18,149 INFO L225 Difference]: With dead ends: 10163 [2021-07-09 18:01:18,149 INFO L226 Difference]: Without dead ends: 10016 [2021-07-09 18:01:18,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 708.0ms TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:01:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10016 states. [2021-07-09 18:01:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10016 to 9614. [2021-07-09 18:01:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9614 states, 9613 states have (on average 4.5156558826588995) internal successors, (43409), 9613 states have internal predecessors, (43409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9614 states to 9614 states and 43409 transitions. [2021-07-09 18:01:18,375 INFO L78 Accepts]: Start accepts. Automaton has 9614 states and 43409 transitions. Word has length 30 [2021-07-09 18:01:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:18,375 INFO L482 AbstractCegarLoop]: Abstraction has 9614 states and 43409 transitions. [2021-07-09 18:01:18,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 9614 states and 43409 transitions. [2021-07-09 18:01:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:18,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:18,396 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] [2021-07-09 18:01:18,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:18,596 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1020757778, now seen corresponding path program 81 times [2021-07-09 18:01:18,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:18,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328932549] [2021-07-09 18:01:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:18,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:18,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328932549] [2021-07-09 18:01:18,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328932549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:18,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251614703] [2021-07-09 18:01:18,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:18,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:01:18,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:18,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:18,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:19,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:19,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:19,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:19,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 18:01:19,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:19,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:19,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:19,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-09 18:01:19,148 INFO 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 18:01:19,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251614703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:19,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:19,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:01:19,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476999158] [2021-07-09 18:01:19,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:01:19,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:19,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:01:19,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:01:19,149 INFO L87 Difference]: Start difference. First operand 9614 states and 43409 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:20,697 INFO L93 Difference]: Finished difference Result 10720 states and 47708 transitions. [2021-07-09 18:01:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:01:20,698 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:20,726 INFO L225 Difference]: With dead ends: 10720 [2021-07-09 18:01:20,726 INFO L226 Difference]: Without dead ends: 10587 [2021-07-09 18:01:20,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1041.5ms TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:01:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10587 states. [2021-07-09 18:01:20,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10587 to 9624. [2021-07-09 18:01:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9624 states, 9623 states have (on average 4.514080847968409) internal successors, (43439), 9623 states have internal predecessors, (43439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9624 states to 9624 states and 43439 transitions. [2021-07-09 18:01:20,954 INFO L78 Accepts]: Start accepts. Automaton has 9624 states and 43439 transitions. Word has length 30 [2021-07-09 18:01:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:20,954 INFO L482 AbstractCegarLoop]: Abstraction has 9624 states and 43439 transitions. [2021-07-09 18:01:20,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 9624 states and 43439 transitions. [2021-07-09 18:01:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:20,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:20,974 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:21,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:21,174 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:21,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:21,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1527104044, now seen corresponding path program 82 times [2021-07-09 18:01:21,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:21,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676374751] [2021-07-09 18:01:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:21,354 INFO 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 18:01:21,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:21,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676374751] [2021-07-09 18:01:21,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676374751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:21,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492387916] [2021-07-09 18:01:21,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:21,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:21,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:21,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:21,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:21,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:21,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:21,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:21,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 18:01:21,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:21,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:21,578 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 18:01:21,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-09 18:01:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:21,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492387916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:21,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:21,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:01:21,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106008128] [2021-07-09 18:01:21,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:01:21,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:21,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:01:21,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:01:21,640 INFO L87 Difference]: Start difference. First operand 9624 states and 43439 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:22,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:22,872 INFO L93 Difference]: Finished difference Result 10225 states and 45732 transitions. [2021-07-09 18:01:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:01:22,872 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:22,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:22,901 INFO L225 Difference]: With dead ends: 10225 [2021-07-09 18:01:22,901 INFO L226 Difference]: Without dead ends: 10070 [2021-07-09 18:01:22,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 753.3ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:01:22,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10070 states. [2021-07-09 18:01:23,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10070 to 9616. [2021-07-09 18:01:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9616 states, 9615 states have (on average 4.515028601144046) internal successors, (43412), 9615 states have internal predecessors, (43412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9616 states to 9616 states and 43412 transitions. [2021-07-09 18:01:23,116 INFO L78 Accepts]: Start accepts. Automaton has 9616 states and 43412 transitions. Word has length 30 [2021-07-09 18:01:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:23,116 INFO L482 AbstractCegarLoop]: Abstraction has 9616 states and 43412 transitions. [2021-07-09 18:01:23,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 9616 states and 43412 transitions. [2021-07-09 18:01:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:23,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:23,135 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:23,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-07-09 18:01:23,335 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash 423059838, now seen corresponding path program 83 times [2021-07-09 18:01:23,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:23,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13678546] [2021-07-09 18:01:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:23,569 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 18:01:23,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:23,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13678546] [2021-07-09 18:01:23,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13678546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:23,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233969183] [2021-07-09 18:01:23,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:23,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:01:23,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:23,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:23,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:23,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:23,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:23,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:01:23,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:23,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:23,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:23,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2021-07-09 18:01:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:23,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233969183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:23,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:23,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:01:23,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465548279] [2021-07-09 18:01:23,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:01:23,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:23,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:01:23,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:23,859 INFO L87 Difference]: Start difference. First operand 9616 states and 43412 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:25,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:25,583 INFO L93 Difference]: Finished difference Result 9794 states and 44017 transitions. [2021-07-09 18:01:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:01:25,583 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:25,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:25,614 INFO L225 Difference]: With dead ends: 9794 [2021-07-09 18:01:25,614 INFO L226 Difference]: Without dead ends: 9739 [2021-07-09 18:01:25,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1275.0ms TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:01:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9739 states. [2021-07-09 18:01:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9739 to 9618. [2021-07-09 18:01:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9618 states, 9617 states have (on average 4.51460954559634) internal successors, (43417), 9617 states have internal predecessors, (43417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9618 states to 9618 states and 43417 transitions. [2021-07-09 18:01:25,838 INFO L78 Accepts]: Start accepts. Automaton has 9618 states and 43417 transitions. Word has length 30 [2021-07-09 18:01:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:25,838 INFO L482 AbstractCegarLoop]: Abstraction has 9618 states and 43417 transitions. [2021-07-09 18:01:25,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9618 states and 43417 transitions. [2021-07-09 18:01:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:25,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:25,858 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:26,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable711 [2021-07-09 18:01:26,059 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:26,059 INFO L82 PathProgramCache]: Analyzing trace with hash -972527238, now seen corresponding path program 84 times [2021-07-09 18:01:26,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:26,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835471973] [2021-07-09 18:01:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:26,292 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 18:01:26,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:26,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835471973] [2021-07-09 18:01:26,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835471973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:26,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487439969] [2021-07-09 18:01:26,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:26,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:01:26,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:26,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:01:26,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:26,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:26,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:26,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:26,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 18:01:26,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:26,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:26,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:26,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-07-09 18:01:26,666 INFO 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 18:01:26,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487439969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:26,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:26,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:01:26,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282045023] [2021-07-09 18:01:26,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:01:26,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:26,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:01:26,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:01:26,667 INFO L87 Difference]: Start difference. First operand 9618 states and 43417 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:27,344 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-07-09 18:01:27,664 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-07-09 18:01:28,093 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-07-09 18:01:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:30,014 INFO L93 Difference]: Finished difference Result 10754 states and 47765 transitions. [2021-07-09 18:01:30,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:01:30,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:30,044 INFO L225 Difference]: With dead ends: 10754 [2021-07-09 18:01:30,044 INFO L226 Difference]: Without dead ends: 10557 [2021-07-09 18:01:30,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 2589.4ms TimeCoverageRelationStatistics Valid=706, Invalid=4406, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:01:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10557 states. [2021-07-09 18:01:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10557 to 9643. [2021-07-09 18:01:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9643 states, 9642 states have (on average 4.512549263638249) internal successors, (43510), 9642 states have internal predecessors, (43510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9643 states to 9643 states and 43510 transitions. [2021-07-09 18:01:30,259 INFO L78 Accepts]: Start accepts. Automaton has 9643 states and 43510 transitions. Word has length 30 [2021-07-09 18:01:30,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:30,259 INFO L482 AbstractCegarLoop]: Abstraction has 9643 states and 43510 transitions. [2021-07-09 18:01:30,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 9643 states and 43510 transitions. [2021-07-09 18:01:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:30,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:30,278 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:30,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:30,479 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:30,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:30,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1336230824, now seen corresponding path program 85 times [2021-07-09 18:01:30,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:30,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761581851] [2021-07-09 18:01:30,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:30,800 INFO 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 18:01:30,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:30,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761581851] [2021-07-09 18:01:30,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761581851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:30,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814754981] [2021-07-09 18:01:30,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:30,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:30,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:31,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:31,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:31,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:31,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:01:31,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:31,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:31,021 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 18:01:31,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 18:01:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:31,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814754981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:31,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:31,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-09 18:01:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819234745] [2021-07-09 18:01:31,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:01:31,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:31,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:01:31,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:01:31,092 INFO L87 Difference]: Start difference. First operand 9643 states and 43510 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:32,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:32,544 INFO L93 Difference]: Finished difference Result 10091 states and 45230 transitions. [2021-07-09 18:01:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:01:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:32,584 INFO L225 Difference]: With dead ends: 10091 [2021-07-09 18:01:32,584 INFO L226 Difference]: Without dead ends: 9977 [2021-07-09 18:01:32,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1215.7ms TimeCoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:01:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9977 states. [2021-07-09 18:01:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9977 to 9647. [2021-07-09 18:01:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9647 states, 9646 states have (on average 4.51244038979888) internal successors, (43527), 9646 states have internal predecessors, (43527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9647 states to 9647 states and 43527 transitions. [2021-07-09 18:01:32,882 INFO L78 Accepts]: Start accepts. Automaton has 9647 states and 43527 transitions. Word has length 30 [2021-07-09 18:01:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:32,882 INFO L482 AbstractCegarLoop]: Abstraction has 9647 states and 43527 transitions. [2021-07-09 18:01:32,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 9647 states and 43527 transitions. [2021-07-09 18:01:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:32,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:32,903 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:33,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:33,103 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:33,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1868987806, now seen corresponding path program 86 times [2021-07-09 18:01:33,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:33,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685931483] [2021-07-09 18:01:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:33,370 INFO 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 18:01:33,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:33,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685931483] [2021-07-09 18:01:33,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685931483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:33,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342728854] [2021-07-09 18:01:33,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:33,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:33,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:33,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:01:33,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:33,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:33,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:33,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 18:01:33,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:33,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:33,613 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 18:01:33,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-07-09 18:01:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:33,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342728854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:33,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:33,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:01:33,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226875356] [2021-07-09 18:01:33,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:01:33,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:33,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:01:33,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:33,861 INFO L87 Difference]: Start difference. First operand 9647 states and 43527 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:35,273 INFO L93 Difference]: Finished difference Result 10074 states and 45069 transitions. [2021-07-09 18:01:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:01:35,274 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:35,301 INFO L225 Difference]: With dead ends: 10074 [2021-07-09 18:01:35,302 INFO L226 Difference]: Without dead ends: 9926 [2021-07-09 18:01:35,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1183.5ms TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:01:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2021-07-09 18:01:35,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 9646. [2021-07-09 18:01:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9646 states, 9645 states have (on average 4.511767755313634) internal successors, (43516), 9645 states have internal predecessors, (43516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9646 states to 9646 states and 43516 transitions. [2021-07-09 18:01:35,524 INFO L78 Accepts]: Start accepts. Automaton has 9646 states and 43516 transitions. Word has length 30 [2021-07-09 18:01:35,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:35,524 INFO L482 AbstractCegarLoop]: Abstraction has 9646 states and 43516 transitions. [2021-07-09 18:01:35,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand 9646 states and 43516 transitions. [2021-07-09 18:01:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:35,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:35,628 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:35,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:35,829 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:35,829 INFO L82 PathProgramCache]: Analyzing trace with hash 580244706, now seen corresponding path program 87 times [2021-07-09 18:01:35,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:35,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639596088] [2021-07-09 18:01:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:36,061 INFO 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 18:01:36,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:36,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639596088] [2021-07-09 18:01:36,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639596088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:36,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866269256] [2021-07-09 18:01:36,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:36,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:01:36,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:36,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:01:36,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:36,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:36,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:36,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 18:01:36,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:36,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:36,276 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 18:01:36,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-07-09 18:01:36,539 INFO 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 18:01:36,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866269256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:36,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:36,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:01:36,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102293575] [2021-07-09 18:01:36,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:01:36,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:36,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:01:36,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:36,540 INFO L87 Difference]: Start difference. First operand 9646 states and 43516 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,223 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-09 18:01:39,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:39,839 INFO L93 Difference]: Finished difference Result 10339 states and 45896 transitions. [2021-07-09 18:01:39,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:01:39,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:39,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:39,870 INFO L225 Difference]: With dead ends: 10339 [2021-07-09 18:01:39,871 INFO L226 Difference]: Without dead ends: 10115 [2021-07-09 18:01:39,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 2605.5ms TimeCoverageRelationStatistics Valid=554, Invalid=3736, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:01:39,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10115 states. [2021-07-09 18:01:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10115 to 9648. [2021-07-09 18:01:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9648 states, 9647 states have (on average 4.511454338136208) internal successors, (43522), 9647 states have internal predecessors, (43522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9648 states to 9648 states and 43522 transitions. [2021-07-09 18:01:40,102 INFO L78 Accepts]: Start accepts. Automaton has 9648 states and 43522 transitions. Word has length 30 [2021-07-09 18:01:40,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:40,102 INFO L482 AbstractCegarLoop]: Abstraction has 9648 states and 43522 transitions. [2021-07-09 18:01:40,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 9648 states and 43522 transitions. [2021-07-09 18:01:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:40,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:40,125 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:40,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-07-09 18:01:40,326 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:40,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:40,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1970358584, now seen corresponding path program 88 times [2021-07-09 18:01:40,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:40,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646351865] [2021-07-09 18:01:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:40,595 INFO 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 18:01:40,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:40,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646351865] [2021-07-09 18:01:40,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646351865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:40,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501467602] [2021-07-09 18:01:40,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:40,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:40,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:40,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:40,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:40,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:40,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:40,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:40,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:01:40,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:40,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:40,786 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 18:01:40,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 18:01:40,878 INFO 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 18:01:40,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501467602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:40,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:40,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:01:40,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552164543] [2021-07-09 18:01:40,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:01:40,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:40,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:01:40,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:01:40,879 INFO L87 Difference]: Start difference. First operand 9648 states and 43522 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:42,381 INFO L93 Difference]: Finished difference Result 10091 states and 45177 transitions. [2021-07-09 18:01:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:01:42,382 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:42,411 INFO L225 Difference]: With dead ends: 10091 [2021-07-09 18:01:42,411 INFO L226 Difference]: Without dead ends: 9959 [2021-07-09 18:01:42,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1225.2ms TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:01:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9959 states. [2021-07-09 18:01:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9959 to 9659. [2021-07-09 18:01:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9659 states, 9658 states have (on average 4.510147028370263) internal successors, (43559), 9658 states have internal predecessors, (43559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9659 states to 9659 states and 43559 transitions. [2021-07-09 18:01:42,758 INFO L78 Accepts]: Start accepts. Automaton has 9659 states and 43559 transitions. Word has length 30 [2021-07-09 18:01:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:42,758 INFO L482 AbstractCegarLoop]: Abstraction has 9659 states and 43559 transitions. [2021-07-09 18:01:42,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 9659 states and 43559 transitions. [2021-07-09 18:01:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:42,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:42,779 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:42,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-07-09 18:01:42,980 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash 555435182, now seen corresponding path program 89 times [2021-07-09 18:01:42,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:42,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572729865] [2021-07-09 18:01:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:43,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:43,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572729865] [2021-07-09 18:01:43,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572729865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:43,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135877515] [2021-07-09 18:01:43,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:43,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:01:43,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:43,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:43,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:43,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:43,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:43,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:43,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-09 18:01:43,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:43,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:43,391 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 18:01:43,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:183 [2021-07-09 18:01:43,527 INFO 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 18:01:43,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135877515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:43,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:43,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:01:43,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550174751] [2021-07-09 18:01:43,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:01:43,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:01:43,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:01:43,528 INFO L87 Difference]: Start difference. First operand 9659 states and 43559 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:45,380 INFO L93 Difference]: Finished difference Result 10624 states and 47359 transitions. [2021-07-09 18:01:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:01:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:45,411 INFO L225 Difference]: With dead ends: 10624 [2021-07-09 18:01:45,411 INFO L226 Difference]: Without dead ends: 10519 [2021-07-09 18:01:45,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1444.8ms TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:01:45,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10519 states. [2021-07-09 18:01:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10519 to 9659. [2021-07-09 18:01:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9659 states, 9658 states have (on average 4.510147028370263) internal successors, (43559), 9658 states have internal predecessors, (43559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9659 states to 9659 states and 43559 transitions. [2021-07-09 18:01:45,638 INFO L78 Accepts]: Start accepts. Automaton has 9659 states and 43559 transitions. Word has length 30 [2021-07-09 18:01:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:45,638 INFO L482 AbstractCegarLoop]: Abstraction has 9659 states and 43559 transitions. [2021-07-09 18:01:45,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 9659 states and 43559 transitions. [2021-07-09 18:01:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:45,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:45,657 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:45,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable731 [2021-07-09 18:01:45,858 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:45,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:45,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1224813476, now seen corresponding path program 90 times [2021-07-09 18:01:45,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:45,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33133101] [2021-07-09 18:01:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:46,028 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-07-09 18:01:46,158 INFO 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 18:01:46,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:46,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33133101] [2021-07-09 18:01:46,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33133101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:46,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451916865] [2021-07-09 18:01:46,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:46,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:01:46,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:46,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:46,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:46,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:46,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:46,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 18:01:46,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:46,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:46,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:46,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-07-09 18:01:46,550 INFO 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 18:01:46,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451916865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:46,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:46,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 18:01:46,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007640426] [2021-07-09 18:01:46,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:01:46,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:46,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:01:46,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:01:46,551 INFO L87 Difference]: Start difference. First operand 9659 states and 43559 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:49,116 INFO L93 Difference]: Finished difference Result 10804 states and 48122 transitions. [2021-07-09 18:01:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:01:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:49,148 INFO L225 Difference]: With dead ends: 10804 [2021-07-09 18:01:49,148 INFO L226 Difference]: Without dead ends: 10684 [2021-07-09 18:01:49,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1949.1ms TimeCoverageRelationStatistics Valid=448, Invalid=2744, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:01:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10684 states. [2021-07-09 18:01:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10684 to 9658. [2021-07-09 18:01:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9658 states, 9657 states have (on average 4.5096820958889925) internal successors, (43550), 9657 states have internal predecessors, (43550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9658 states to 9658 states and 43550 transitions. [2021-07-09 18:01:49,482 INFO L78 Accepts]: Start accepts. Automaton has 9658 states and 43550 transitions. Word has length 30 [2021-07-09 18:01:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:49,482 INFO L482 AbstractCegarLoop]: Abstraction has 9658 states and 43550 transitions. [2021-07-09 18:01:49,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand 9658 states and 43550 transitions. [2021-07-09 18:01:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:49,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:49,503 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:49,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:49,704 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:49,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1485718586, now seen corresponding path program 91 times [2021-07-09 18:01:49,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:49,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193560837] [2021-07-09 18:01:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:49,910 INFO 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 18:01:49,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:49,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193560837] [2021-07-09 18:01:49,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193560837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:49,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384305373] [2021-07-09 18:01:49,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:49,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:50,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:50,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:50,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:50,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:01:50,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:50,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:50,075 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 18:01:50,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 18:01:50,151 INFO 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 18:01:50,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384305373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:50,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:50,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:01:50,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403321029] [2021-07-09 18:01:50,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:01:50,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:50,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:01:50,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:01:50,152 INFO L87 Difference]: Start difference. First operand 9658 states and 43550 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:51,803 INFO L93 Difference]: Finished difference Result 10438 states and 46550 transitions. [2021-07-09 18:01:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:01:51,803 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:51,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:51,836 INFO L225 Difference]: With dead ends: 10438 [2021-07-09 18:01:51,836 INFO L226 Difference]: Without dead ends: 10267 [2021-07-09 18:01:51,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1319.7ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:01:51,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10267 states. [2021-07-09 18:01:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10267 to 9644. [2021-07-09 18:01:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9644 states, 9643 states have (on average 4.512081302499222) internal successors, (43510), 9643 states have internal predecessors, (43510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9644 states to 9644 states and 43510 transitions. [2021-07-09 18:01:52,083 INFO L78 Accepts]: Start accepts. Automaton has 9644 states and 43510 transitions. Word has length 30 [2021-07-09 18:01:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:52,083 INFO L482 AbstractCegarLoop]: Abstraction has 9644 states and 43510 transitions. [2021-07-09 18:01:52,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 9644 states and 43510 transitions. [2021-07-09 18:01:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:52,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:52,104 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:52,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable744,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:52,305 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash 97329558, now seen corresponding path program 8 times [2021-07-09 18:01:52,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:52,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122002571] [2021-07-09 18:01:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:52,461 INFO 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 18:01:52,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:52,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122002571] [2021-07-09 18:01:52,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122002571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:52,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816927133] [2021-07-09 18:01:52,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:52,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:52,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:52,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:52,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:52,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:52,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:52,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:52,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:01:52,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:52,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:52,760 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 18:01:52,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:01:52,791 INFO 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 18:01:52,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816927133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:52,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:52,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-09 18:01:52,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679266916] [2021-07-09 18:01:52,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:01:52,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:52,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:01:52,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:01:52,792 INFO L87 Difference]: Start difference. First operand 9644 states and 43510 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:53,627 INFO L93 Difference]: Finished difference Result 10148 states and 45370 transitions. [2021-07-09 18:01:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:01:53,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:53,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:53,658 INFO L225 Difference]: With dead ends: 10148 [2021-07-09 18:01:53,658 INFO L226 Difference]: Without dead ends: 9947 [2021-07-09 18:01:53,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 457.4ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9947 states. [2021-07-09 18:01:53,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9947 to 9647. [2021-07-09 18:01:53,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9647 states, 9646 states have (on average 4.512025710138918) internal successors, (43523), 9646 states have internal predecessors, (43523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:53,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9647 states to 9647 states and 43523 transitions. [2021-07-09 18:01:53,909 INFO L78 Accepts]: Start accepts. Automaton has 9647 states and 43523 transitions. Word has length 30 [2021-07-09 18:01:53,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:53,909 INFO L482 AbstractCegarLoop]: Abstraction has 9647 states and 43523 transitions. [2021-07-09 18:01:53,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:53,909 INFO L276 IsEmpty]: Start isEmpty. Operand 9647 states and 43523 transitions. [2021-07-09 18:01:53,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:53,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:53,930 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:54,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable745 [2021-07-09 18:01:54,130 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:54,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:54,131 INFO L82 PathProgramCache]: Analyzing trace with hash -949036506, now seen corresponding path program 72 times [2021-07-09 18:01:54,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:54,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549699714] [2021-07-09 18:01:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:54,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:54,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549699714] [2021-07-09 18:01:54,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549699714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:54,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845952591] [2021-07-09 18:01:54,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:54,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:01:54,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:54,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:54,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:54,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:54,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:54,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:54,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:01:54,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:54,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:54,517 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 18:01:54,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:01:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:54,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845952591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:54,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:54,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 18:01:54,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95817195] [2021-07-09 18:01:54,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:01:54,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:54,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:01:54,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:01:54,566 INFO L87 Difference]: Start difference. First operand 9647 states and 43523 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:55,455 INFO L93 Difference]: Finished difference Result 10033 states and 44998 transitions. [2021-07-09 18:01:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:01:55,456 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:55,484 INFO L225 Difference]: With dead ends: 10033 [2021-07-09 18:01:55,485 INFO L226 Difference]: Without dead ends: 9935 [2021-07-09 18:01:55,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:01:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9935 states. [2021-07-09 18:01:55,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9935 to 9662. [2021-07-09 18:01:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9662 states, 9661 states have (on average 4.511334230410931) internal successors, (43584), 9661 states have internal predecessors, (43584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9662 states to 9662 states and 43584 transitions. [2021-07-09 18:01:55,749 INFO L78 Accepts]: Start accepts. Automaton has 9662 states and 43584 transitions. Word has length 30 [2021-07-09 18:01:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:55,749 INFO L482 AbstractCegarLoop]: Abstraction has 9662 states and 43584 transitions. [2021-07-09 18:01:55,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 9662 states and 43584 transitions. [2021-07-09 18:01:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:55,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:55,770 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:55,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable746,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:55,971 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:55,971 INFO L82 PathProgramCache]: Analyzing trace with hash -328552440, now seen corresponding path program 73 times [2021-07-09 18:01:55,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:55,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324368119] [2021-07-09 18:01:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:56,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:56,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324368119] [2021-07-09 18:01:56,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324368119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:56,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993634248] [2021-07-09 18:01:56,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:56,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:56,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:56,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:56,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:56,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:56,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:01:56,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:56,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:56,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:56,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-09 18:01:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:56,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993634248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:56,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:56,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-09 18:01:56,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662714489] [2021-07-09 18:01:56,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:01:56,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:56,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:01:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:01:56,390 INFO L87 Difference]: Start difference. First operand 9662 states and 43584 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:57,174 INFO L93 Difference]: Finished difference Result 9994 states and 44825 transitions. [2021-07-09 18:01:57,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:01:57,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:57,206 INFO L225 Difference]: With dead ends: 9994 [2021-07-09 18:01:57,206 INFO L226 Difference]: Without dead ends: 9902 [2021-07-09 18:01:57,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 515.4ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:01:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9902 states. [2021-07-09 18:01:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9902 to 9656. [2021-07-09 18:01:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9656 states, 9655 states have (on average 4.5112377006732265) internal successors, (43556), 9655 states have internal predecessors, (43556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9656 states to 9656 states and 43556 transitions. [2021-07-09 18:01:57,449 INFO L78 Accepts]: Start accepts. Automaton has 9656 states and 43556 transitions. Word has length 30 [2021-07-09 18:01:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:57,449 INFO L482 AbstractCegarLoop]: Abstraction has 9656 states and 43556 transitions. [2021-07-09 18:01:57,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 9656 states and 43556 transitions. [2021-07-09 18:01:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:57,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:57,467 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:57,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-07-09 18:01:57,668 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:57,668 INFO L82 PathProgramCache]: Analyzing trace with hash 2032488358, now seen corresponding path program 74 times [2021-07-09 18:01:57,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:57,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067652682] [2021-07-09 18:01:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:57,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:57,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067652682] [2021-07-09 18:01:57,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067652682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:57,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750810504] [2021-07-09 18:01:57,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:57,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:57,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:57,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:01:57,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:58,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:58,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:58,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:58,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-09 18:01:58,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:58,195 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-09 18:01:58,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:58,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-09 18:01:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:58,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750810504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:58,240 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, 13] total 23 [2021-07-09 18:01:58,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842639252] [2021-07-09 18:01:58,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 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 23 interpolants. [2021-07-09 18:01:58,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:58,240 INFO L87 Difference]: Start difference. First operand 9656 states and 43556 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:59,483 INFO L93 Difference]: Finished difference Result 10259 states and 45849 transitions. [2021-07-09 18:01:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:01:59,483 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:01:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:59,513 INFO L225 Difference]: With dead ends: 10259 [2021-07-09 18:01:59,513 INFO L226 Difference]: Without dead ends: 10143 [2021-07-09 18:01:59,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 884.6ms TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:01:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10143 states. [2021-07-09 18:01:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10143 to 9650. [2021-07-09 18:01:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9650 states, 9649 states have (on average 4.511762876982071) internal successors, (43534), 9649 states have internal predecessors, (43534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9650 states to 9650 states and 43534 transitions. [2021-07-09 18:01:59,729 INFO L78 Accepts]: Start accepts. Automaton has 9650 states and 43534 transitions. Word has length 30 [2021-07-09 18:01:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:59,729 INFO L482 AbstractCegarLoop]: Abstraction has 9650 states and 43534 transitions. [2021-07-09 18:01:59,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 9650 states and 43534 transitions. [2021-07-09 18:01:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:01:59,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:59,750 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:59,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:59,950 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:59,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:59,951 INFO L82 PathProgramCache]: Analyzing trace with hash -782480168, now seen corresponding path program 75 times [2021-07-09 18:01:59,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:59,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984466588] [2021-07-09 18:01:59,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:00,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:00,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984466588] [2021-07-09 18:02:00,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984466588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:00,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036818234] [2021-07-09 18:02:00,204 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 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 18:02:00,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:02:00,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:00,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:02:00,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:00,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:00,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:00,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:00,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:02:00,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:00,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:00,387 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 18:02:00,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 18:02:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:00,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036818234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:00,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:00,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 18:02:00,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244973416] [2021-07-09 18:02:00,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:02:00,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:00,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:02:00,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:02:00,451 INFO L87 Difference]: Start difference. First operand 9650 states and 43534 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:01,484 INFO L93 Difference]: Finished difference Result 10141 states and 45411 transitions. [2021-07-09 18:02:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:02:01,484 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:02:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:01,516 INFO L225 Difference]: With dead ends: 10141 [2021-07-09 18:02:01,516 INFO L226 Difference]: Without dead ends: 10037 [2021-07-09 18:02:01,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 763.9ms TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:02:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10037 states. [2021-07-09 18:02:01,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10037 to 9672. [2021-07-09 18:02:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9672 states, 9671 states have (on average 4.510391893289215) internal successors, (43620), 9671 states have internal predecessors, (43620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9672 states to 9672 states and 43620 transitions. [2021-07-09 18:02:01,773 INFO L78 Accepts]: Start accepts. Automaton has 9672 states and 43620 transitions. Word has length 30 [2021-07-09 18:02:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:01,773 INFO L482 AbstractCegarLoop]: Abstraction has 9672 states and 43620 transitions. [2021-07-09 18:02:01,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 9672 states and 43620 transitions. [2021-07-09 18:02:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:02:01,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:01,792 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:01,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable749 [2021-07-09 18:02:01,993 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:01,994 INFO L82 PathProgramCache]: Analyzing trace with hash 961883838, now seen corresponding path program 76 times [2021-07-09 18:02:01,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:01,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180972883] [2021-07-09 18:02:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:02,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:02,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180972883] [2021-07-09 18:02:02,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180972883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:02,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145940198] [2021-07-09 18:02:02,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:02,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:02,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:02,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:02:02,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:02,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:02,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:02,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:02,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:02:02,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:02,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:02,362 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 18:02:02,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 18:02:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:02,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145940198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:02,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:02,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 18:02:02,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124474747] [2021-07-09 18:02:02,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:02:02,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:02,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:02:02,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:02:02,429 INFO L87 Difference]: Start difference. First operand 9672 states and 43620 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:03,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:03,393 INFO L93 Difference]: Finished difference Result 10015 states and 44923 transitions. [2021-07-09 18:02:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:02:03,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:02:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:03,425 INFO L225 Difference]: With dead ends: 10015 [2021-07-09 18:02:03,425 INFO L226 Difference]: Without dead ends: 9917 [2021-07-09 18:02:03,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 584.3ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:02:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9917 states. [2021-07-09 18:02:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9917 to 9678. [2021-07-09 18:02:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9678 states, 9677 states have (on average 4.510282112224863) internal successors, (43646), 9677 states have internal predecessors, (43646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9678 states to 9678 states and 43646 transitions. [2021-07-09 18:02:03,665 INFO L78 Accepts]: Start accepts. Automaton has 9678 states and 43646 transitions. Word has length 30 [2021-07-09 18:02:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:03,665 INFO L482 AbstractCegarLoop]: Abstraction has 9678 states and 43646 transitions. [2021-07-09 18:02:03,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand 9678 states and 43646 transitions. [2021-07-09 18:02:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:02:03,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:03,685 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:03,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:03,886 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:03,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1582367904, now seen corresponding path program 77 times [2021-07-09 18:02:03,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:03,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212778705] [2021-07-09 18:02:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:04,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:04,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212778705] [2021-07-09 18:02:04,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212778705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:04,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39084133] [2021-07-09 18:02:04,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:04,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:04,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:04,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:02:04,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:04,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:04,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:04,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:04,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:02:04,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:04,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:04,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:04,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 18:02:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:04,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39084133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:04,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:04,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-09 18:02:04,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400297382] [2021-07-09 18:02:04,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:02:04,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:04,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:02:04,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:02:04,344 INFO L87 Difference]: Start difference. First operand 9678 states and 43646 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:05,204 INFO L93 Difference]: Finished difference Result 10011 states and 44888 transitions. [2021-07-09 18:02:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:02:05,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:02:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:05,233 INFO L225 Difference]: With dead ends: 10011 [2021-07-09 18:02:05,233 INFO L226 Difference]: Without dead ends: 9919 [2021-07-09 18:02:05,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 500.3ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:02:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9919 states. [2021-07-09 18:02:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9919 to 9672. [2021-07-09 18:02:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9672 states, 9671 states have (on average 4.509978285596112) internal successors, (43616), 9671 states have internal predecessors, (43616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9672 states to 9672 states and 43616 transitions. [2021-07-09 18:02:05,456 INFO L78 Accepts]: Start accepts. Automaton has 9672 states and 43616 transitions. Word has length 30 [2021-07-09 18:02:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:05,456 INFO L482 AbstractCegarLoop]: Abstraction has 9672 states and 43616 transitions. [2021-07-09 18:02:05,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:05,456 INFO L276 IsEmpty]: Start isEmpty. Operand 9672 states and 43616 transitions. [2021-07-09 18:02:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:02:05,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:05,475 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:05,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-07-09 18:02:05,676 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:05,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:05,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1941336736, now seen corresponding path program 78 times [2021-07-09 18:02:05,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:05,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522578713] [2021-07-09 18:02:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:05,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:05,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522578713] [2021-07-09 18:02:05,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522578713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:05,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472248784] [2021-07-09 18:02:05,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:05,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:02:05,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:05,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:02:05,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:06,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:06,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:06,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-07-09 18:02:06,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:06,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:06,053 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 18:02:06,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 [2021-07-09 18:02:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:06,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472248784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:06,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:06,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:02:06,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060243756] [2021-07-09 18:02:06,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:02:06,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:06,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:02:06,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:02:06,244 INFO L87 Difference]: Start difference. First operand 9672 states and 43616 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:06,563 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-07-09 18:02:06,770 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-07-09 18:02:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:08,368 INFO L93 Difference]: Finished difference Result 10391 states and 46257 transitions. [2021-07-09 18:02:08,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:02:08,369 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:02:08,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:08,398 INFO L225 Difference]: With dead ends: 10391 [2021-07-09 18:02:08,398 INFO L226 Difference]: Without dead ends: 10148 [2021-07-09 18:02:08,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1659.6ms TimeCoverageRelationStatistics Valid=409, Invalid=1847, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:02:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2021-07-09 18:02:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 9672. [2021-07-09 18:02:08,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9672 states, 9671 states have (on average 4.509978285596112) internal successors, (43616), 9671 states have internal predecessors, (43616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:08,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9672 states to 9672 states and 43616 transitions. [2021-07-09 18:02:08,607 INFO L78 Accepts]: Start accepts. Automaton has 9672 states and 43616 transitions. Word has length 30 [2021-07-09 18:02:08,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:08,607 INFO L482 AbstractCegarLoop]: Abstraction has 9672 states and 43616 transitions. [2021-07-09 18:02:08,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:08,607 INFO L276 IsEmpty]: Start isEmpty. Operand 9672 states and 43616 transitions. [2021-07-09 18:02:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:02:08,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:08,626 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:08,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable752,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:08,827 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:08,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1717163706, now seen corresponding path program 79 times [2021-07-09 18:02:08,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:08,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607350366] [2021-07-09 18:02:08,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:09,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:09,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607350366] [2021-07-09 18:02:09,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607350366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:09,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717343221] [2021-07-09 18:02:09,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:09,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:02:09,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:09,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:09,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:09,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:09,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:02:09,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:09,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:09,191 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 18:02:09,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 18:02:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:09,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717343221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:09,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:09,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:02:09,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164537143] [2021-07-09 18:02:09,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:02:09,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:09,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:02:09,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:09,273 INFO L87 Difference]: Start difference. First operand 9672 states and 43616 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:10,163 INFO L93 Difference]: Finished difference Result 10101 states and 45229 transitions. [2021-07-09 18:02:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:02:10,163 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:02:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:10,191 INFO L225 Difference]: With dead ends: 10101 [2021-07-09 18:02:10,191 INFO L226 Difference]: Without dead ends: 9984 [2021-07-09 18:02:10,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 555.4ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:02:10,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9984 states. [2021-07-09 18:02:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9984 to 9670. [2021-07-09 18:02:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9670 states, 9669 states have (on average 4.509876926259179) internal successors, (43606), 9669 states have internal predecessors, (43606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9670 states to 9670 states and 43606 transitions. [2021-07-09 18:02:10,510 INFO L78 Accepts]: Start accepts. Automaton has 9670 states and 43606 transitions. Word has length 30 [2021-07-09 18:02:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:10,510 INFO L482 AbstractCegarLoop]: Abstraction has 9670 states and 43606 transitions. [2021-07-09 18:02:10,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9670 states and 43606 transitions. [2021-07-09 18:02:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:02:10,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:10,528 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:10,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:10,729 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:10,729 INFO L82 PathProgramCache]: Analyzing trace with hash 853148546, now seen corresponding path program 9 times [2021-07-09 18:02:10,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:10,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866861033] [2021-07-09 18:02:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:02:10,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:10,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866861033] [2021-07-09 18:02:10,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866861033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:10,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238097907] [2021-07-09 18:02:10,857 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 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 18:02:10,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:02:10,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:10,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:02:10,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:11,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:11,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:11,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:11,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-09 18:02:11,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:11,156 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-09 18:02:11,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:11,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-09 18:02:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:11,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238097907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:11,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:11,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 18:02:11,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341971327] [2021-07-09 18:02:11,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:02:11,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:11,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:02:11,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:02:11,184 INFO L87 Difference]: Start difference. First operand 9670 states and 43606 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:11,969 INFO L93 Difference]: Finished difference Result 10056 states and 45043 transitions. [2021-07-09 18:02:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:02:11,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:02:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:12,001 INFO L225 Difference]: With dead ends: 10056 [2021-07-09 18:02:12,001 INFO L226 Difference]: Without dead ends: 9961 [2021-07-09 18:02:12,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:12,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-07-09 18:02:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 9688. [2021-07-09 18:02:12,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 9687 states have (on average 4.50923918653866) internal successors, (43681), 9687 states have internal predecessors, (43681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 43681 transitions. [2021-07-09 18:02:12,241 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 43681 transitions. Word has length 30 [2021-07-09 18:02:12,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:12,241 INFO L482 AbstractCegarLoop]: Abstraction has 9688 states and 43681 transitions. [2021-07-09 18:02:12,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 43681 transitions. [2021-07-09 18:02:12,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:02:12,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:12,262 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:12,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-07-09 18:02:12,463 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:12,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:12,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1718803998, now seen corresponding path program 80 times [2021-07-09 18:02:12,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:12,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18874040] [2021-07-09 18:02:12,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:12,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:12,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18874040] [2021-07-09 18:02:12,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18874040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:12,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378202604] [2021-07-09 18:02:12,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:12,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:12,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:12,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:02:12,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:12,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:12,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:12,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:12,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-09 18:02:12,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:12,996 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-09 18:02:12,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:12,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-09 18:02:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:13,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378202604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:13,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:13,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:02:13,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55396541] [2021-07-09 18:02:13,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:13,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:13,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:13,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:13,044 INFO L87 Difference]: Start difference. First operand 9688 states and 43681 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:14,458 INFO L93 Difference]: Finished difference Result 10181 states and 45531 transitions. [2021-07-09 18:02:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:02:14,458 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:02:14,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:14,486 INFO L225 Difference]: With dead ends: 10181 [2021-07-09 18:02:14,486 INFO L226 Difference]: Without dead ends: 10069 [2021-07-09 18:02:14,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 899.9ms TimeCoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:02:14,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10069 states. [2021-07-09 18:02:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10069 to 9690. [2021-07-09 18:02:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 4.509340489214574) internal successors, (43691), 9689 states have internal predecessors, (43691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 43691 transitions. [2021-07-09 18:02:14,689 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 43691 transitions. Word has length 30 [2021-07-09 18:02:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:14,690 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 43691 transitions. [2021-07-09 18:02:14,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 43691 transitions. [2021-07-09 18:02:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:02:14,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:14,709 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:14,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-07-09 18:02:14,910 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:14,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1721578654, now seen corresponding path program 81 times [2021-07-09 18:02:14,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:14,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997295921] [2021-07-09 18:02:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:15,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:15,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997295921] [2021-07-09 18:02:15,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997295921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:15,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949388374] [2021-07-09 18:02:15,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:15,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:02:15,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:15,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:02:15,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:15,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:15,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:15,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:15,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:15,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-09 18:02:15,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:15,396 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-07-09 18:02:15,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:15,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-07-09 18:02:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:15,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949388374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:15,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:15,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:02:15,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637012911] [2021-07-09 18:02:15,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:15,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:15,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:15,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:15,461 INFO L87 Difference]: Start difference. First operand 9690 states and 43691 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:16,914 INFO L93 Difference]: Finished difference Result 10357 states and 46205 transitions. [2021-07-09 18:02:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:02:16,915 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:02:16,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:16,944 INFO L225 Difference]: With dead ends: 10357 [2021-07-09 18:02:16,944 INFO L226 Difference]: Without dead ends: 10250 [2021-07-09 18:02:16,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1187.1ms TimeCoverageRelationStatistics Valid=348, Invalid=1632, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:02:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10250 states. [2021-07-09 18:02:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10250 to 9697. [2021-07-09 18:02:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9697 states, 9696 states have (on average 4.507838283828383) internal successors, (43708), 9696 states have internal predecessors, (43708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9697 states to 9697 states and 43708 transitions. [2021-07-09 18:02:17,159 INFO L78 Accepts]: Start accepts. Automaton has 9697 states and 43708 transitions. Word has length 30 [2021-07-09 18:02:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:17,159 INFO L482 AbstractCegarLoop]: Abstraction has 9697 states and 43708 transitions. [2021-07-09 18:02:17,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:17,160 INFO L276 IsEmpty]: Start isEmpty. Operand 9697 states and 43708 transitions. [2021-07-09 18:02:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:02:17,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:17,179 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:17,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-07-09 18:02:17,379 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:17,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1215232388, now seen corresponding path program 82 times [2021-07-09 18:02:17,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:17,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228195709] [2021-07-09 18:02:17,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:17,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:17,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228195709] [2021-07-09 18:02:17,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228195709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:17,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516842497] [2021-07-09 18:02:17,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:17,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:17,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:17,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:02:17,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:17,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:17,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:17,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:17,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 18:02:17,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:17,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:17,802 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 18:02:17,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-09 18:02:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:17,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516842497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:17,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:17,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:02:17,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427688543] [2021-07-09 18:02:17,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:02:17,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:17,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:02:17,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:02:17,866 INFO L87 Difference]: Start difference. First operand 9697 states and 43708 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:19,029 INFO L93 Difference]: Finished difference Result 10237 states and 45770 transitions. [2021-07-09 18:02:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:02:19,030 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:02:19,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:19,059 INFO L225 Difference]: With dead ends: 10237 [2021-07-09 18:02:19,059 INFO L226 Difference]: Without dead ends: 10106 [2021-07-09 18:02:19,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 786.7ms TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:02:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-07-09 18:02:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9688. [2021-07-09 18:02:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 9687 states have (on average 4.50934241767317) internal successors, (43682), 9687 states have internal predecessors, (43682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:19,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 43682 transitions. [2021-07-09 18:02:19,273 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 43682 transitions. Word has length 30 [2021-07-09 18:02:19,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:19,273 INFO L482 AbstractCegarLoop]: Abstraction has 9688 states and 43682 transitions. [2021-07-09 18:02:19,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 43682 transitions. [2021-07-09 18:02:19,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:02:19,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:19,381 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:19,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-07-09 18:02:19,582 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:19,582 INFO L82 PathProgramCache]: Analyzing trace with hash 922714558, now seen corresponding path program 83 times [2021-07-09 18:02:19,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:19,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986026410] [2021-07-09 18:02:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:19,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:19,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986026410] [2021-07-09 18:02:19,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986026410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:19,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592653180] [2021-07-09 18:02:19,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:19,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:19,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:19,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:02:19,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:19,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:19,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:19,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:19,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:02:19,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:19,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:19,931 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 18:02:19,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-09 18:02:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:19,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592653180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:19,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:19,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 18:02:19,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786356235] [2021-07-09 18:02:19,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:02:19,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:19,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:02:19,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:02:19,999 INFO L87 Difference]: Start difference. First operand 9688 states and 43682 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:21,017 INFO L93 Difference]: Finished difference Result 10180 states and 45546 transitions. [2021-07-09 18:02:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:02:21,017 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:02:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:21,049 INFO L225 Difference]: With dead ends: 10180 [2021-07-09 18:02:21,049 INFO L226 Difference]: Without dead ends: 10075 [2021-07-09 18:02:21,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 719.7ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:02:21,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10075 states. [2021-07-09 18:02:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10075 to 9682. [2021-07-09 18:02:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9682 states, 9681 states have (on average 4.5093482078297695) internal successors, (43655), 9681 states have internal predecessors, (43655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9682 states to 9682 states and 43655 transitions. [2021-07-09 18:02:21,280 INFO L78 Accepts]: Start accepts. Automaton has 9682 states and 43655 transitions. Word has length 30 [2021-07-09 18:02:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:21,280 INFO L482 AbstractCegarLoop]: Abstraction has 9682 states and 43655 transitions. [2021-07-09 18:02:21,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 9682 states and 43655 transitions. [2021-07-09 18:02:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:02:21,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:21,301 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:21,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable764,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:21,501 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:21,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:21,502 INFO L82 PathProgramCache]: Analyzing trace with hash -216230256, now seen corresponding path program 92 times [2021-07-09 18:02:21,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:21,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022421093] [2021-07-09 18:02:21,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:21,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:21,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022421093] [2021-07-09 18:02:21,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022421093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:21,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255126913] [2021-07-09 18:02:21,716 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 18:02:21,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:21,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:21,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:02:21,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:21,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:21,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:21,983 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 18:02:21,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:02:22,025 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2021-07-09 18:02:22,028 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 18:02:22,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:51 [2021-07-09 18:02:22,144 INFO 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 18:02:22,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255126913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:22,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:22,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:02:22,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361422212] [2021-07-09 18:02:22,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:02:22,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:22,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:02:22,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:02:22,145 INFO L87 Difference]: Start difference. First operand 9682 states and 43655 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:25,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:25,104 INFO L93 Difference]: Finished difference Result 12354 states and 53928 transitions. [2021-07-09 18:02:25,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:02:25,104 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:02:25,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:25,139 INFO L225 Difference]: With dead ends: 12354 [2021-07-09 18:02:25,139 INFO L226 Difference]: Without dead ends: 12039 [2021-07-09 18:02:25,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1682.5ms TimeCoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:02:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12039 states. [2021-07-09 18:02:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12039 to 9835. [2021-07-09 18:02:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9835 states, 9834 states have (on average 4.511287370347773) internal successors, (44364), 9834 states have internal predecessors, (44364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9835 states to 9835 states and 44364 transitions. [2021-07-09 18:02:25,404 INFO L78 Accepts]: Start accepts. Automaton has 9835 states and 44364 transitions. Word has length 30 [2021-07-09 18:02:25,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:25,404 INFO L482 AbstractCegarLoop]: Abstraction has 9835 states and 44364 transitions. [2021-07-09 18:02:25,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:25,404 INFO L276 IsEmpty]: Start isEmpty. Operand 9835 states and 44364 transitions. [2021-07-09 18:02:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:02:25,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:25,424 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:25,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-07-09 18:02:25,624 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:25,625 INFO L82 PathProgramCache]: Analyzing trace with hash -31236598, now seen corresponding path program 84 times [2021-07-09 18:02:25,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:25,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857988128] [2021-07-09 18:02:25,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:25,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:25,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857988128] [2021-07-09 18:02:25,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857988128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:25,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619392562] [2021-07-09 18:02:25,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:25,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:02:25,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:25,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:02:25,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:26,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:26,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:26,141 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 18:02:26,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:02:26,184 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2021-07-09 18:02:26,187 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 18:02:26,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:51 [2021-07-09 18:02:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:26,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619392562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:26,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:26,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-09 18:02:26,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057049300] [2021-07-09 18:02:26,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:02:26,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:26,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:02:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:02:26,264 INFO L87 Difference]: Start difference. First operand 9835 states and 44364 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:28,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:28,688 INFO L93 Difference]: Finished difference Result 11735 states and 51333 transitions. [2021-07-09 18:02:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:02:28,689 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:02:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:28,722 INFO L225 Difference]: With dead ends: 11735 [2021-07-09 18:02:28,722 INFO L226 Difference]: Without dead ends: 11585 [2021-07-09 18:02:28,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1303.4ms TimeCoverageRelationStatistics Valid=219, Invalid=2133, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:02:28,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2021-07-09 18:02:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9827. [2021-07-09 18:02:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9827 states, 9826 states have (on average 4.511500101770812) internal successors, (44330), 9826 states have internal predecessors, (44330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9827 states to 9827 states and 44330 transitions. [2021-07-09 18:02:29,070 INFO L78 Accepts]: Start accepts. Automaton has 9827 states and 44330 transitions. Word has length 30 [2021-07-09 18:02:29,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:29,070 INFO L482 AbstractCegarLoop]: Abstraction has 9827 states and 44330 transitions. [2021-07-09 18:02:29,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 9827 states and 44330 transitions. [2021-07-09 18:02:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:02:29,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:29,091 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:29,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:29,291 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:29,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1191371828, now seen corresponding path program 93 times [2021-07-09 18:02:29,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:29,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27297760] [2021-07-09 18:02:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:29,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:29,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27297760] [2021-07-09 18:02:29,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27297760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:29,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619789027] [2021-07-09 18:02:29,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:29,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:02:29,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:29,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:02:29,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:29,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:29,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:29,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 18:02:29,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:29,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:29,688 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 18:02:29,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-07-09 18:02:29,855 INFO 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 18:02:29,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619789027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:29,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:29,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:02:29,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735572191] [2021-07-09 18:02:29,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:02:29,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:29,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:02:29,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:02:29,856 INFO L87 Difference]: Start difference. First operand 9827 states and 44330 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-09 18:02:30,587 WARN L222 SmtUtils]: Removed 4 from assertion stack [2021-07-09 18:02:30,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:02:30,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-07-09 18:02:30,788 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:02:30,788 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (3/3) [2021-07-09 18:02:30,788 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:02:30,790 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:02:30,790 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:02:30 BasicIcfg [2021-07-09 18:02:30,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:02:30,790 INFO L168 Benchmark]: Toolchain (without parser) took 772932.47 ms. Allocated memory was 232.8 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 212.6 MB in the beginning and 807.9 MB in the end (delta: -595.4 MB). Peak memory consumption was 705.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:02:30,790 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 232.8 MB. Free memory is still 213.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:02:30,790 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.24 ms. Allocated memory is still 232.8 MB. Free memory was 212.5 MB in the beginning and 211.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:02:30,791 INFO L168 Benchmark]: Boogie Preprocessor took 15.21 ms. Allocated memory is still 232.8 MB. Free memory was 211.0 MB in the beginning and 210.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:02:30,791 INFO L168 Benchmark]: RCFGBuilder took 426.10 ms. Allocated memory is still 232.8 MB. Free memory was 210.0 MB in the beginning and 191.9 MB in the end (delta: 18.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-07-09 18:02:30,791 INFO L168 Benchmark]: TraceAbstraction took 772464.72 ms. Allocated memory was 232.8 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 191.5 MB in the beginning and 807.9 MB in the end (delta: -616.4 MB). Peak memory consumption was 684.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:02:30,791 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 0.11 ms. Allocated memory is still 232.8 MB. Free memory is still 213.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.24 ms. Allocated memory is still 232.8 MB. Free memory was 212.5 MB in the beginning and 211.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.21 ms. Allocated memory is still 232.8 MB. Free memory was 211.0 MB in the beginning and 210.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 426.10 ms. Allocated memory is still 232.8 MB. Free memory was 210.0 MB in the beginning and 191.9 MB in the end (delta: 18.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 772464.72 ms. Allocated memory was 232.8 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 191.5 MB in the beginning and 807.9 MB in the end (delta: -616.4 MB). Peak memory consumption was 684.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (9827states) and FLOYD_HOARE automaton (currently 20 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 41ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread4Thread1of1ForFork1 with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 71.2ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 20.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 46.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread1Thread1of1ForFork0 with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 2.5ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 772116.4ms, OverallIterations: 357, TraceHistogramMax: 2, EmptinessCheckTime: 4109.8ms, AutomataDifference: 507904.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38617 SDtfs, 101746 SDslu, 347692 SDs, 0 SdLazy, 396254 SolverSat, 40552 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 178890.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21205 GetRequests, 7331 SyntacticMatches, 518 SemanticMatches, 13355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177994 ImplicationChecksByTransitivity, 352482.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9835occurred in iteration=355, InterpolantAutomatonStates: 11989, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43358.2ms AutomataMinimizationTime, 356 MinimizatonAttempts, 440095 StatesRemovedByMinimization, 353 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2306.0ms SsaConstructionTime, 5159.7ms SatisfiabilityAnalysisTime, 130829.5ms InterpolantComputationTime, 20148 NumberOfCodeBlocks, 20148 NumberOfCodeBlocksAsserted, 1077 NumberOfCheckSat, 19447 ConstructedInterpolants, 764 QuantifiedInterpolants, 250172 SizeOfPredicates, 2664 NumberOfNonLiveVariables, 43320 ConjunctsInSsa, 9461 ConjunctsInUnsatCore, 701 InterpolantComputations, 13 PerfectInterpolantSequences, 193/3183 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