/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/eqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:31:50,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:31:50,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:31:50,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:31:50,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:31:50,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:31:50,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:31:50,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:31:50,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:31:50,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:31:50,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:31:50,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:31:50,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:31:50,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:31:50,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:31:50,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:31:50,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:31:50,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:31:50,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:31:50,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:31:50,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:31:50,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:31:50,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:31:50,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:31:50,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:31:50,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:31:50,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:31:50,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:31:50,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:31:50,726 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:31:50,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:31:50,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:31:50,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:31:50,730 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:31:50,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:31:50,731 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:31:50,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:31:50,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:31:50,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:31:50,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:31:50,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:31:50,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:31:50,732 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:31:50,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:31:50,732 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:31:50,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:31:50,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:31:50,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:31:50,733 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:31:50,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:31:50,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:31:50,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:31:50,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:31:50,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:31:50,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:31:50,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:31:50,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:31:50,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:31:50,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:31:51,027 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:31:51,040 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:31:51,043 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:31:51,045 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:31:51,045 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:31:51,046 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn2f.c [2020-07-07 11:31:51,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaa7210c6/ae980bfe6740427f84c5d997d69b8655/FLAGfc3c0ece1 [2020-07-07 11:31:51,517 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:31:51,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn2f.c [2020-07-07 11:31:51,527 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaa7210c6/ae980bfe6740427f84c5d997d69b8655/FLAGfc3c0ece1 [2020-07-07 11:31:51,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaa7210c6/ae980bfe6740427f84c5d997d69b8655 [2020-07-07 11:31:51,947 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:31:51,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:31:51,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:31:51,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:31:51,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:31:51,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:31:51" (1/1) ... [2020-07-07 11:31:51,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133d215e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:51, skipping insertion in model container [2020-07-07 11:31:51,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:31:51" (1/1) ... [2020-07-07 11:31:51,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:31:51,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:31:52,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:31:52,220 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:31:52,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:31:52,278 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:31:52,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:52 WrapperNode [2020-07-07 11:31:52,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:31:52,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:31:52,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:31:52,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:31:52,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:52" (1/1) ... [2020-07-07 11:31:52,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:52" (1/1) ... [2020-07-07 11:31:52,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:52" (1/1) ... [2020-07-07 11:31:52,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:52" (1/1) ... [2020-07-07 11:31:52,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:52" (1/1) ... [2020-07-07 11:31:52,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:52" (1/1) ... [2020-07-07 11:31:52,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:52" (1/1) ... [2020-07-07 11:31:52,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:31:52,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:31:52,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:31:52,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:31:52,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:52" (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 [2020-07-07 11:31:52,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:31:52,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:31:52,503 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:31:52,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:31:52,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:31:52,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:31:52,503 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:31:52,504 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:31:52,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:31:52,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:31:52,504 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 11:31:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:31:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 11:31:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:31:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:31:52,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:31:52,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:31:52,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:31:52,781 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:31:52,781 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 11:31:52,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:31:52 BoogieIcfgContainer [2020-07-07 11:31:52,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:31:52,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:31:52,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:31:52,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:31:52,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:31:51" (1/3) ... [2020-07-07 11:31:52,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de9a844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:31:52, skipping insertion in model container [2020-07-07 11:31:52,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:52" (2/3) ... [2020-07-07 11:31:52,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de9a844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:31:52, skipping insertion in model container [2020-07-07 11:31:52,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:31:52" (3/3) ... [2020-07-07 11:31:52,793 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2020-07-07 11:31:52,806 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:31:52,813 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:31:52,827 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:31:52,852 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:31:52,852 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:31:52,852 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:31:52,852 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:31:52,853 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:31:52,853 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:31:52,853 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:31:52,853 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:31:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-07 11:31:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:31:52,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:52,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:52,883 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:52,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-07-07 11:31:52,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:52,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085043360] [2020-07-07 11:31:52,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:53,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085043360] [2020-07-07 11:31:53,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:53,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:31:53,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552242392] [2020-07-07 11:31:53,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:31:53,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:53,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:31:53,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:31:53,153 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-07-07 11:31:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:53,295 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-07-07 11:31:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:31:53,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-07 11:31:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:53,306 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:31:53,307 INFO L226 Difference]: Without dead ends: 29 [2020-07-07 11:31:53,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:31:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-07 11:31:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-07 11:31:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-07 11:31:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-07-07 11:31:53,349 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-07-07 11:31:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:53,350 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-07-07 11:31:53,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:31:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-07-07 11:31:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:31:53,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:53,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:53,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:31:53,352 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:53,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-07-07 11:31:53,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:53,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291870064] [2020-07-07 11:31:53,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:53,397 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:53,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819271649] [2020-07-07 11:31:53,399 INFO L94 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 [2020-07-07 11:31:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:53,464 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:31:53,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:53,556 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:53,557 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2020-07-07 11:31:53,558 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:53,586 INFO L624 ElimStorePlain]: treesize reduction 16, result has 59.0 percent of original size [2020-07-07 11:31:53,589 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:31:53,589 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:7 [2020-07-07 11:31:53,625 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:53,626 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 19 [2020-07-07 11:31:53,627 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-07 11:31:53,639 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-07 11:31:53,640 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:31:53,640 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-07 11:31:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:53,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291870064] [2020-07-07 11:31:53,677 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:31:53,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819271649] [2020-07-07 11:31:53,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:53,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 11:31:53,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929046769] [2020-07-07 11:31:53,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:31:53,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:53,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:31:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:31:53,681 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-07-07 11:31:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:53,806 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-07-07 11:31:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:31:53,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-07 11:31:53,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:53,810 INFO L225 Difference]: With dead ends: 47 [2020-07-07 11:31:53,810 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 11:31:53,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:31:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 11:31:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-07-07 11:31:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:31:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-07-07 11:31:53,841 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2020-07-07 11:31:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:53,842 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-07-07 11:31:53,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:31:53,842 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-07-07 11:31:53,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 11:31:53,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:53,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:54,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:31:54,059 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:54,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:54,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2104565367, now seen corresponding path program 1 times [2020-07-07 11:31:54,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:54,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192972215] [2020-07-07 11:31:54,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:54,083 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:54,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343609286] [2020-07-07 11:31:54,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-07 11:31:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:54,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:31:54,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:54,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192972215] [2020-07-07 11:31:54,174 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:31:54,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343609286] [2020-07-07 11:31:54,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:54,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:31:54,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464404807] [2020-07-07 11:31:54,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:31:54,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:54,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:31:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:31:54,177 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2020-07-07 11:31:54,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:54,294 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-07-07 11:31:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:31:54,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-07 11:31:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:54,301 INFO L225 Difference]: With dead ends: 71 [2020-07-07 11:31:54,301 INFO L226 Difference]: Without dead ends: 58 [2020-07-07 11:31:54,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:31:54,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-07 11:31:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2020-07-07 11:31:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:31:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-07-07 11:31:54,321 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2020-07-07 11:31:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:54,327 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-07-07 11:31:54,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:31:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-07-07 11:31:54,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 11:31:54,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:54,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:54,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:54,529 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:54,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2011180599, now seen corresponding path program 1 times [2020-07-07 11:31:54,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:54,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90644601] [2020-07-07 11:31:54,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:54,548 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:54,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667923772] [2020-07-07 11:31:54,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-07 11:31:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:54,599 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:31:54,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:54,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90644601] [2020-07-07 11:31:54,623 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:31:54,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667923772] [2020-07-07 11:31:54,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:54,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-07 11:31:54,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795696132] [2020-07-07 11:31:54,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:31:54,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:54,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:31:54,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:31:54,625 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 5 states. [2020-07-07 11:31:54,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:54,721 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-07-07 11:31:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:31:54,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-07 11:31:54,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:54,723 INFO L225 Difference]: With dead ends: 66 [2020-07-07 11:31:54,723 INFO L226 Difference]: Without dead ends: 55 [2020-07-07 11:31:54,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:31:54,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-07 11:31:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-07-07 11:31:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-07 11:31:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-07-07 11:31:54,732 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2020-07-07 11:31:54,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:54,733 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-07-07 11:31:54,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:31:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-07-07 11:31:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 11:31:54,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:54,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:54,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:54,948 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:54,949 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-07-07 11:31:54,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:54,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481783307] [2020-07-07 11:31:54,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:54,968 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:54,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071932049] [2020-07-07 11:31:54,969 INFO L94 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 [2020-07-07 11:31:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:55,019 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-07 11:31:55,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:55,038 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-07 11:31:55,039 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:55,045 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:55,050 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-07 11:31:55,051 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:55,057 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:55,058 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:31:55,058 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-07-07 11:31:55,116 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-07-07 11:31:55,117 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-07-07 11:31:55,119 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:55,147 INFO L624 ElimStorePlain]: treesize reduction 24, result has 67.1 percent of original size [2020-07-07 11:31:55,149 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:55,152 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:31:55,153 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-07-07 11:31:55,154 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:55,174 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:55,203 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:55,231 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:55,296 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-07-07 11:31:55,296 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:55,310 INFO L440 ElimStorePlain]: Different costs {12=[v_prenex_3], 20=[|v_#memory_int_14|]} [2020-07-07 11:31:55,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:31:55,322 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-07 11:31:55,323 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2020-07-07 11:31:55,324 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:55,364 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:55,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:31:55,411 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-07-07 11:31:55,412 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 85 [2020-07-07 11:31:55,414 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:55,494 INFO L624 ElimStorePlain]: treesize reduction 69, result has 62.5 percent of original size [2020-07-07 11:31:55,499 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2020-07-07 11:31:55,500 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:115 [2020-07-07 11:31:57,150 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 49 [2020-07-07 11:31:58,583 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 52 [2020-07-07 11:31:58,587 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:58,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:31:58,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:31:58,618 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:31:58,621 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:31:58,640 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-07-07 11:31:58,640 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 47 [2020-07-07 11:31:58,644 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:31:58,644 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:58,645 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:58,690 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-07-07 11:31:58,690 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 43 [2020-07-07 11:31:58,692 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-07-07 11:31:58,729 INFO L624 ElimStorePlain]: treesize reduction 24, result has 48.9 percent of original size [2020-07-07 11:31:58,731 INFO L544 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:31:58,731 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:143, output treesize:7 [2020-07-07 11:31:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:58,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481783307] [2020-07-07 11:31:58,802 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:31:58,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071932049] [2020-07-07 11:31:58,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:58,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-07 11:31:58,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581139589] [2020-07-07 11:31:58,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:31:58,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:58,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:31:58,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:31:58,804 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 10 states. [2020-07-07 11:32:04,912 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-07-07 11:32:08,546 WARN L193 SmtUtils]: Spent 3.56 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-07-07 11:32:12,976 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-07-07 11:32:17,338 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-07-07 11:32:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:18,860 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-07-07 11:32:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:32:18,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-07 11:32:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:18,866 INFO L225 Difference]: With dead ends: 69 [2020-07-07 11:32:18,866 INFO L226 Difference]: Without dead ends: 67 [2020-07-07 11:32:18,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:32:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-07 11:32:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 46. [2020-07-07 11:32:18,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-07 11:32:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-07-07 11:32:18,878 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 26 [2020-07-07 11:32:18,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:18,878 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-07-07 11:32:18,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:32:18,879 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-07-07 11:32:18,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:32:18,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:18,880 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:19,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:19,085 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:19,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1499578309, now seen corresponding path program 2 times [2020-07-07 11:32:19,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:19,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646208625] [2020-07-07 11:32:19,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:19,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646208625] [2020-07-07 11:32:19,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887138298] [2020-07-07 11:32:19,233 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-07-07 11:32:19,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:32:19,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:19,273 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:32:19,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:19,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:19,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-07 11:32:19,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671478914] [2020-07-07 11:32:19,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:32:19,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:32:19,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:32:19,324 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 11 states. [2020-07-07 11:32:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:19,705 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-07-07 11:32:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:32:19,707 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-07 11:32:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:19,709 INFO L225 Difference]: With dead ends: 84 [2020-07-07 11:32:19,709 INFO L226 Difference]: Without dead ends: 71 [2020-07-07 11:32:19,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:32:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-07 11:32:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 45. [2020-07-07 11:32:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 11:32:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-07 11:32:19,734 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2020-07-07 11:32:19,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:19,735 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-07 11:32:19,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:32:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-07 11:32:19,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:32:19,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:19,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:19,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 11:32:19,939 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:19,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1048027141, now seen corresponding path program 3 times [2020-07-07 11:32:19,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:19,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816174607] [2020-07-07 11:32:19,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:20,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816174607] [2020-07-07 11:32:20,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571964253] [2020-07-07 11:32:20,036 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-07 11:32:20,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-07 11:32:20,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:20,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:32:20,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:20,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:20,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-07 11:32:20,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576539140] [2020-07-07 11:32:20,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:32:20,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:20,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:32:20,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:32:20,157 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 11 states. [2020-07-07 11:32:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:20,621 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-07-07 11:32:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:32:20,622 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-07 11:32:20,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:20,624 INFO L225 Difference]: With dead ends: 79 [2020-07-07 11:32:20,624 INFO L226 Difference]: Without dead ends: 68 [2020-07-07 11:32:20,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:32:20,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-07 11:32:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2020-07-07 11:32:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-07 11:32:20,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-07 11:32:20,635 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 28 [2020-07-07 11:32:20,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:20,635 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-07 11:32:20,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:32:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-07 11:32:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 11:32:20,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:20,637 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:20,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:20,852 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash 913238305, now seen corresponding path program 1 times [2020-07-07 11:32:20,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:20,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412994758] [2020-07-07 11:32:20,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:20,862 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:32:20,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362030902] [2020-07-07 11:32:20,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-07 11:32:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:20,900 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 11:32:20,902 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:20,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412994758] [2020-07-07 11:32:20,929 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:32:20,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362030902] [2020-07-07 11:32:20,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:20,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 11:32:20,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308811885] [2020-07-07 11:32:20,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:32:20,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:20,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:32:20,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:32:20,933 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 6 states. [2020-07-07 11:32:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:21,040 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-07-07 11:32:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:32:21,041 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-07 11:32:21,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:21,041 INFO L225 Difference]: With dead ends: 72 [2020-07-07 11:32:21,041 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 11:32:21,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:32:21,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 11:32:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-07-07 11:32:21,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-07 11:32:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-07-07 11:32:21,049 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 30 [2020-07-07 11:32:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:21,050 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-07-07 11:32:21,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:32:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-07-07 11:32:21,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 11:32:21,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:21,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:21,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:21,255 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:21,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:21,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2071122883, now seen corresponding path program 4 times [2020-07-07 11:32:21,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:21,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611422055] [2020-07-07 11:32:21,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:21,286 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:32:21,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135467213] [2020-07-07 11:32:21,287 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:21,323 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:32:21,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:21,328 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-07 11:32:21,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:21,347 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-07 11:32:21,348 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:21,360 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:21,366 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-07 11:32:21,366 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:21,378 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:21,379 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:21,379 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-07-07 11:32:21,457 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-07-07 11:32:21,457 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-07-07 11:32:21,459 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:21,518 INFO L624 ElimStorePlain]: treesize reduction 24, result has 67.1 percent of original size [2020-07-07 11:32:21,519 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:21,520 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:32:21,520 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-07-07 11:32:21,521 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:21,554 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:21,590 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:21,591 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:21,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:21,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:21,888 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-07-07 11:32:21,889 INFO L350 Elim1Store]: treesize reduction 17, result has 92.5 percent of original size [2020-07-07 11:32:21,889 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 63 treesize of output 252 [2020-07-07 11:32:21,892 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-07-07 11:32:21,892 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-07 11:32:21,893 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-07-07 11:32:21,893 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:32:21,894 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-07 11:32:21,894 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:32:21,895 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-07 11:32:21,895 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:21,896 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:21,896 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:21,899 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:21,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:21,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:21,982 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:21,983 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 143 [2020-07-07 11:32:21,985 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-07 11:32:21,985 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:32:21,986 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-07 11:32:21,986 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:21,987 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:21,987 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:21,988 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:22,404 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 44 [2020-07-07 11:32:22,405 INFO L624 ElimStorePlain]: treesize reduction 775, result has 14.9 percent of original size [2020-07-07 11:32:22,406 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:22,407 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-07-07 11:32:22,407 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:121, output treesize:101 [2020-07-07 11:32:22,408 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:22,498 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:22,556 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:22,608 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:22,824 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-07-07 11:32:22,827 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:22,847 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:22,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:22,851 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:22,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:22,856 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:22,882 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:22,902 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2020-07-07 11:32:22,903 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:22,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:22,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:22,937 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:22,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:22,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:22,978 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:23,021 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 64 [2020-07-07 11:32:23,023 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:23,034 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:23,035 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:23,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:23,061 INFO L350 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2020-07-07 11:32:23,062 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 107 [2020-07-07 11:32:23,063 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:23,344 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-07-07 11:32:23,345 INFO L624 ElimStorePlain]: treesize reduction 53, result has 78.5 percent of original size [2020-07-07 11:32:23,346 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2020-07-07 11:32:23,346 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:212, output treesize:194 [2020-07-07 11:32:23,564 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-07 11:32:23,567 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 6, 1] term [2020-07-07 11:32:23,567 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:23,794 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-07 11:32:23,796 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:23,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:23,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:23,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:23,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:23,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:23,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:23,952 INFO L244 Elim1Store]: Index analysis took 113 ms [2020-07-07 11:32:24,041 INFO L350 Elim1Store]: treesize reduction 17, result has 81.7 percent of original size [2020-07-07 11:32:24,042 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 175 [2020-07-07 11:32:24,044 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:24,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,228 INFO L244 Elim1Store]: Index analysis took 157 ms [2020-07-07 11:32:24,242 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:24,243 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 98 [2020-07-07 11:32:24,244 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:24,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:24,310 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:24,311 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 107 [2020-07-07 11:32:24,312 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:24,603 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-07-07 11:32:24,604 INFO L624 ElimStorePlain]: treesize reduction 210, result has 53.4 percent of original size [2020-07-07 11:32:24,608 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 10 dim-0 vars, and 3 xjuncts. [2020-07-07 11:32:24,609 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:261, output treesize:241 [2020-07-07 11:32:26,859 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 101 [2020-07-07 11:32:29,640 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 104 [2020-07-07 11:32:29,643 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:29,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,697 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:29,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,721 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:29,835 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-07-07 11:32:29,836 INFO L350 Elim1Store]: treesize reduction 17, result has 84.0 percent of original size [2020-07-07 11:32:29,836 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 88 treesize of output 111 [2020-07-07 11:32:29,839 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-07 11:32:29,839 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:29,840 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:29,840 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:29,842 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:29,842 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:29,843 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:29,843 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:29,847 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-07 11:32:29,847 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:29,848 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:29,848 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:29,850 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-07 11:32:29,850 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:29,851 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:29,851 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:29,852 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:29,852 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:29,852 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:29,853 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:29,858 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-07 11:32:29,859 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:29,859 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:29,859 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:29,860 INFO L544 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-07 11:32:29,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,892 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:29,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,900 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:29,948 INFO L350 Elim1Store]: treesize reduction 10, result has 81.5 percent of original size [2020-07-07 11:32:29,949 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 82 treesize of output 65 [2020-07-07 11:32:29,951 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:29,952 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:29,963 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:32:29,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:29,992 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:29,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:30,092 INFO L350 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2020-07-07 11:32:30,093 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 82 treesize of output 80 [2020-07-07 11:32:30,094 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:30,095 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:30,098 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:32:30,395 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-07-07 11:32:30,396 INFO L624 ElimStorePlain]: treesize reduction 68, result has 65.7 percent of original size [2020-07-07 11:32:30,403 INFO L544 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:30,404 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 13 variables, input treesize:283, output treesize:7 [2020-07-07 11:32:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:30,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611422055] [2020-07-07 11:32:30,553 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:32:30,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135467213] [2020-07-07 11:32:30,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:32:30,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-07 11:32:30,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287574016] [2020-07-07 11:32:30,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:32:30,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:30,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:32:30,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:32:30,554 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 13 states. [2020-07-07 11:32:31,408 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-07-07 11:32:31,783 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-07-07 11:32:36,074 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 120 DAG size of output: 120 [2020-07-07 11:32:42,790 WARN L193 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 107 DAG size of output: 107 [2020-07-07 11:32:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:45,261 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2020-07-07 11:32:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 11:32:45,265 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-07-07 11:32:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:45,266 INFO L225 Difference]: With dead ends: 69 [2020-07-07 11:32:45,266 INFO L226 Difference]: Without dead ends: 67 [2020-07-07 11:32:45,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:32:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-07 11:32:45,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2020-07-07 11:32:45,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:32:45,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-07-07 11:32:45,277 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 30 [2020-07-07 11:32:45,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:45,277 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-07-07 11:32:45,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:32:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-07-07 11:32:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-07 11:32:45,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:45,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:45,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 11:32:45,480 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:45,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1718620161, now seen corresponding path program 5 times [2020-07-07 11:32:45,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:45,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737139937] [2020-07-07 11:32:45,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:45,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737139937] [2020-07-07 11:32:45,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713280168] [2020-07-07 11:32:45,584 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:45,632 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-07-07 11:32:45,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:45,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:32:45,635 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:45,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:45,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2020-07-07 11:32:45,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307721350] [2020-07-07 11:32:45,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:32:45,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:45,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:32:45,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:32:45,703 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 14 states. [2020-07-07 11:32:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:46,251 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-07-07 11:32:46,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 11:32:46,253 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-07-07 11:32:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:46,255 INFO L225 Difference]: With dead ends: 100 [2020-07-07 11:32:46,255 INFO L226 Difference]: Without dead ends: 87 [2020-07-07 11:32:46,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:32:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-07 11:32:46,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 51. [2020-07-07 11:32:46,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 11:32:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-07-07 11:32:46,265 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 32 [2020-07-07 11:32:46,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:46,265 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-07-07 11:32:46,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:32:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-07-07 11:32:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-07 11:32:46,266 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:46,266 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:46,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:46,471 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:46,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:46,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1569644609, now seen corresponding path program 6 times [2020-07-07 11:32:46,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:46,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22345710] [2020-07-07 11:32:46,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:46,486 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:32:46,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305181037] [2020-07-07 11:32:46,487 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:46,537 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-07-07 11:32:46,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:46,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:32:46,540 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:46,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22345710] [2020-07-07 11:32:46,601 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:32:46,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305181037] [2020-07-07 11:32:46,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:32:46,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-07 11:32:46,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633589564] [2020-07-07 11:32:46,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:32:46,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:46,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:32:46,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:32:46,603 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 9 states. [2020-07-07 11:32:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:47,015 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2020-07-07 11:32:47,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:32:47,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-07-07 11:32:47,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:47,019 INFO L225 Difference]: With dead ends: 91 [2020-07-07 11:32:47,019 INFO L226 Difference]: Without dead ends: 80 [2020-07-07 11:32:47,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:32:47,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-07 11:32:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2020-07-07 11:32:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-07 11:32:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-07-07 11:32:47,042 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 32 [2020-07-07 11:32:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:47,042 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-07-07 11:32:47,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:32:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-07-07 11:32:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 11:32:47,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:47,047 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:47,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:47,263 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:47,263 INFO L82 PathProgramCache]: Analyzing trace with hash 890841693, now seen corresponding path program 1 times [2020-07-07 11:32:47,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:47,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919617819] [2020-07-07 11:32:47,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:47,270 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:32:47,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180394647] [2020-07-07 11:32:47,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:32:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:32:47,351 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:32:47,351 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:32:47,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-07 11:32:47,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:32:47 BoogieIcfgContainer [2020-07-07 11:32:47,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:32:47,614 INFO L168 Benchmark]: Toolchain (without parser) took 55666.08 ms. Allocated memory was 146.3 MB in the beginning and 294.1 MB in the end (delta: 147.8 MB). Free memory was 103.7 MB in the beginning and 241.1 MB in the end (delta: -137.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:47,614 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 146.3 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 11:32:47,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.00 ms. Allocated memory is still 146.3 MB. Free memory was 103.5 MB in the beginning and 93.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:47,615 INFO L168 Benchmark]: Boogie Preprocessor took 141.32 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 93.0 MB in the beginning and 180.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:47,616 INFO L168 Benchmark]: RCFGBuilder took 363.56 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 164.2 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:47,616 INFO L168 Benchmark]: TraceAbstraction took 54826.11 ms. Allocated memory was 203.4 MB in the beginning and 294.1 MB in the end (delta: 90.7 MB). Free memory was 163.6 MB in the beginning and 241.1 MB in the end (delta: -77.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:47,618 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 146.3 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 330.00 ms. Allocated memory is still 146.3 MB. Free memory was 103.5 MB in the beginning and 93.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.32 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 93.0 MB in the beginning and 180.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 363.56 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 164.2 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 54826.11 ms. Allocated memory was 203.4 MB in the beginning and 294.1 MB in the end (delta: 90.7 MB). Free memory was 163.6 MB in the beginning and 241.1 MB in the end (delta: -77.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=3, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] a[0] = 8 [L30] b[0] = 1 [L32] i=1 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=1, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, N=2] [L32] COND TRUE i