/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/eqn5f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:31:52,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:31:52,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:31:52,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:31:52,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:31:52,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:31:52,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:31:52,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:31:52,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:31:52,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:31:52,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:31:52,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:31:52,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:31:52,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:31:52,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:31:52,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:31:52,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:31:52,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:31:52,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:31:52,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:31:52,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:31:52,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:31:52,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:31:52,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:31:52,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:31:52,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:31:52,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:31:52,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:31:52,377 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 11:31:52,410 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:31:52,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:31:52,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:31:52,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:31:52,412 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:31:52,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:31:52,412 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:31:52,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:31:52,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:31:52,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:31:52,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:31:52,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:31:52,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:31:52,415 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:31:52,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:31:52,415 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:31:52,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:31:52,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:31:52,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:31:52,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:31:52,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:31:52,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:31:52,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:31:52,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:31:52,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:31:52,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:31:52,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:31:52,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:31:52,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:31:52,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:31:52,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:31:52,701 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:31:52,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:31:52,706 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:31:52,707 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:31:52,707 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn5f.c [2020-07-07 11:31:52,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83937460b/4ced5c08f1fc43efb06a86df7455c2b3/FLAG02baaa79d [2020-07-07 11:31:53,250 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:31:53,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn5f.c [2020-07-07 11:31:53,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83937460b/4ced5c08f1fc43efb06a86df7455c2b3/FLAG02baaa79d [2020-07-07 11:31:53,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83937460b/4ced5c08f1fc43efb06a86df7455c2b3 [2020-07-07 11:31:53,603 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:31:53,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:31:53,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:31:53,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:31:53,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:31:53,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:31:53" (1/1) ... [2020-07-07 11:31:53,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e2e350c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:53, skipping insertion in model container [2020-07-07 11:31:53,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:31:53" (1/1) ... [2020-07-07 11:31:53,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:31:53,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:31:53,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:31:53,833 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:31:53,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:31:53,872 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:31:53,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:53 WrapperNode [2020-07-07 11:31:53,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:31:53,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:31:53,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:31:53,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:31:53,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:53" (1/1) ... [2020-07-07 11:31:53,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:53" (1/1) ... [2020-07-07 11:31:53,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:53" (1/1) ... [2020-07-07 11:31:53,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:53" (1/1) ... [2020-07-07 11:31:53,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:53" (1/1) ... [2020-07-07 11:31:53,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:53" (1/1) ... [2020-07-07 11:31:53,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:53" (1/1) ... [2020-07-07 11:31:54,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:31:54,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:31:54,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:31:54,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:31:54,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:53" (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 11:31:54,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:31:54,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:31:54,066 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:31:54,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:31:54,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:31:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:31:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:31:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:31:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:31:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:31:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 11:31:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:31:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 11:31:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:31:54,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:31:54,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:31:54,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:31:54,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:31:54,330 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:31:54,330 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 11:31:54,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:31:54 BoogieIcfgContainer [2020-07-07 11:31:54,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:31:54,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:31:54,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:31:54,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:31:54,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:31:53" (1/3) ... [2020-07-07 11:31:54,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746414f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:31:54, skipping insertion in model container [2020-07-07 11:31:54,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:53" (2/3) ... [2020-07-07 11:31:54,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746414f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:31:54, skipping insertion in model container [2020-07-07 11:31:54,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:31:54" (3/3) ... [2020-07-07 11:31:54,343 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2020-07-07 11:31:54,353 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:31:54,359 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:31:54,376 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:31:54,407 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:31:54,407 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:31:54,407 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:31:54,407 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:31:54,407 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:31:54,408 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:31:54,408 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:31:54,408 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:31:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-07 11:31:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:31:54,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:54,442 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 11:31:54,442 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-07-07 11:31:54,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:54,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456888670] [2020-07-07 11:31:54,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:54,687 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 11:31:54,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456888670] [2020-07-07 11:31:54,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:54,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:31:54,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306546046] [2020-07-07 11:31:54,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:31:54,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:54,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:31:54,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:31:54,706 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-07-07 11:31:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:54,827 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-07-07 11:31:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:31:54,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-07 11:31:54,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:54,838 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:31:54,839 INFO L226 Difference]: Without dead ends: 29 [2020-07-07 11:31:54,842 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 11:31:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-07 11:31:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-07 11:31:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-07 11:31:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-07-07 11:31:54,885 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-07-07 11:31:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:54,886 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-07-07 11:31:54,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:31:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-07-07 11:31:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:31:54,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:54,888 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 11:31:54,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:31:54,889 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:54,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-07-07 11:31:54,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:54,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420090831] [2020-07-07 11:31:54,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:54,914 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:54,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576188940] [2020-07-07 11:31:54,918 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 11:31:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:54,981 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:31:54,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:55,072 INFO L350 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2020-07-07 11:31:55,073 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2020-07-07 11:31:55,074 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:55,081 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:55,083 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 1 xjuncts. [2020-07-07 11:31:55,083 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2020-07-07 11:31:55,127 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:55,128 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 11:31:55,130 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-07 11:31:55,143 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-07 11:31:55,143 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 11:31:55,144 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-07 11:31:55,177 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 11:31:55,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420090831] [2020-07-07 11:31:55,179 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:31:55,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576188940] [2020-07-07 11:31:55,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:55,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 11:31:55,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154848099] [2020-07-07 11:31:55,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:31:55,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:55,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:31:55,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:31:55,183 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-07-07 11:31:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:55,320 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-07-07 11:31:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:31:55,321 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-07 11:31:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:55,324 INFO L225 Difference]: With dead ends: 47 [2020-07-07 11:31:55,325 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 11:31:55,326 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 11:31:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 11:31:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-07-07 11:31:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:31:55,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-07-07 11:31:55,343 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2020-07-07 11:31:55,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:55,343 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-07-07 11:31:55,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:31:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-07-07 11:31:55,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 11:31:55,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:55,345 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 11:31:55,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:31:55,560 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:55,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2104565367, now seen corresponding path program 1 times [2020-07-07 11:31:55,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:55,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963779708] [2020-07-07 11:31:55,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:55,606 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:55,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358693718] [2020-07-07 11:31:55,612 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 11:31:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:55,674 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:31:55,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:55,707 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 11:31:55,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963779708] [2020-07-07 11:31:55,708 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:31:55,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358693718] [2020-07-07 11:31:55,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:55,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:31:55,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084190201] [2020-07-07 11:31:55,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:31:55,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:55,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:31:55,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:31:55,711 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2020-07-07 11:31:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:55,812 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-07-07 11:31:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:31:55,813 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-07 11:31:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:55,816 INFO L225 Difference]: With dead ends: 71 [2020-07-07 11:31:55,816 INFO L226 Difference]: Without dead ends: 58 [2020-07-07 11:31:55,817 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 11:31:55,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-07 11:31:55,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2020-07-07 11:31:55,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:31:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-07-07 11:31:55,826 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2020-07-07 11:31:55,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:55,826 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-07-07 11:31:55,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:31:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-07-07 11:31:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 11:31:55,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:55,828 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 11:31:56,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:56,031 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:56,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2011180599, now seen corresponding path program 1 times [2020-07-07 11:31:56,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:56,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031222293] [2020-07-07 11:31:56,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:56,051 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:56,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609432443] [2020-07-07 11:31:56,051 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 11:31:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:56,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:31:56,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:56,144 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 11:31:56,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031222293] [2020-07-07 11:31:56,144 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:31:56,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609432443] [2020-07-07 11:31:56,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:56,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-07 11:31:56,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783150749] [2020-07-07 11:31:56,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:31:56,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:56,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:31:56,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:31:56,148 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 5 states. [2020-07-07 11:31:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:56,252 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-07-07 11:31:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:31:56,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-07 11:31:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:56,254 INFO L225 Difference]: With dead ends: 66 [2020-07-07 11:31:56,255 INFO L226 Difference]: Without dead ends: 55 [2020-07-07 11:31:56,255 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 11:31:56,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-07 11:31:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-07-07 11:31:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-07 11:31:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-07-07 11:31:56,265 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2020-07-07 11:31:56,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:56,266 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-07-07 11:31:56,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:31:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-07-07 11:31:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 11:31:56,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:56,267 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 11:31:56,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:56,482 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:56,483 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-07-07 11:31:56,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:56,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359158326] [2020-07-07 11:31:56,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:56,500 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:56,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793737892] [2020-07-07 11:31:56,501 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 11:31:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:56,565 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-07 11:31:56,568 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:56,593 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 11:31:56,595 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:56,607 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:56,613 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 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-07 11:31:56,613 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:56,619 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:56,620 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 11:31:56,621 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-07-07 11:31:56,694 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-07-07 11:31:56,695 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 11:31:56,697 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:56,732 INFO L624 ElimStorePlain]: treesize reduction 24, result has 67.1 percent of original size [2020-07-07 11:31:56,734 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:56,738 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 11:31:56,738 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-07-07 11:31:56,739 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:56,760 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:56,782 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:56,809 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:56,872 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-07-07 11:31:56,872 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:31:56,885 INFO L440 ElimStorePlain]: Different costs {12=[|v_#memory_int_14|], 20=[v_prenex_3]} [2020-07-07 11:31:56,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:31:56,897 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-07 11:31:56,898 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 11:31:56,900 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:56,944 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:56,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:31:56,974 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-07-07 11:31:56,975 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 11:31:56,977 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:57,059 INFO L624 ElimStorePlain]: treesize reduction 53, result has 65.6 percent of original size [2020-07-07 11:31:57,064 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 11:31:57,065 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:101 [2020-07-07 11:31:59,639 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 49 [2020-07-07 11:32:02,334 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification that was a NOOP. DAG size: 52 [2020-07-07 11:32:02,337 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:02,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:02,394 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:02,397 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:02,430 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-07-07 11:32:02,430 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 63 treesize of output 45 [2020-07-07 11:32:02,433 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:02,433 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:02,434 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:02,467 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-07-07 11:32:02,468 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 51 treesize of output 43 [2020-07-07 11:32:02,469 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-07-07 11:32:02,507 INFO L624 ElimStorePlain]: treesize reduction 24, result has 48.9 percent of original size [2020-07-07 11:32:02,509 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 11:32:02,509 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:129, output treesize:7 [2020-07-07 11:32:02,569 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 11:32:02,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359158326] [2020-07-07 11:32:02,570 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:32:02,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793737892] [2020-07-07 11:32:02,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:32:02,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-07 11:32:02,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127455501] [2020-07-07 11:32:02,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:32:02,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:02,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:32:02,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:32:02,572 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 10 states. [2020-07-07 11:32:15,190 WARN L193 SmtUtils]: Spent 9.03 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-07-07 11:32:22,495 WARN L193 SmtUtils]: Spent 7.21 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-07-07 11:32:32,243 WARN L193 SmtUtils]: Spent 7.62 s on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-07-07 11:32:38,696 WARN L193 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-07-07 11:32:43,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:43,688 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-07-07 11:32:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:32:43,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-07 11:32:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:43,693 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:32:43,693 INFO L226 Difference]: Without dead ends: 62 [2020-07-07 11:32:43,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=51, Invalid=188, Unknown=1, NotChecked=0, Total=240 [2020-07-07 11:32:43,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-07 11:32:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-07-07 11:32:43,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-07 11:32:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-07-07 11:32:43,711 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 26 [2020-07-07 11:32:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:43,712 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-07-07 11:32:43,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:32:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-07-07 11:32:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:32:43,713 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:43,713 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 11:32:43,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:43,916 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:43,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1499578309, now seen corresponding path program 2 times [2020-07-07 11:32:43,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:43,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329079002] [2020-07-07 11:32:43,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:44,109 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 11:32:44,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329079002] [2020-07-07 11:32:44,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194372723] [2020-07-07 11:32:44,110 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 11:32:44,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:32:44,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:44,160 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:32:44,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:44,214 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 11:32:44,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:44,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-07 11:32:44,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449839324] [2020-07-07 11:32:44,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:32:44,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:44,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:32:44,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:32:44,217 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 11 states. [2020-07-07 11:32:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:44,682 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-07-07 11:32:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:32:44,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-07 11:32:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:44,686 INFO L225 Difference]: With dead ends: 84 [2020-07-07 11:32:44,686 INFO L226 Difference]: Without dead ends: 71 [2020-07-07 11:32:44,687 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 11:32:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-07 11:32:44,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 45. [2020-07-07 11:32:44,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 11:32:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-07 11:32:44,706 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2020-07-07 11:32:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:44,707 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-07 11:32:44,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:32:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-07 11:32:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:32:44,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:44,709 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 11:32:44,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 11:32:44,911 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1048027141, now seen corresponding path program 3 times [2020-07-07 11:32:44,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:44,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845329168] [2020-07-07 11:32:44,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:45,024 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 11:32:45,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845329168] [2020-07-07 11:32:45,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717452820] [2020-07-07 11:32:45,025 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 11:32:45,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-07 11:32:45,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:45,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:32:45,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:45,142 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 11:32:45,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:45,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-07 11:32:45,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132371829] [2020-07-07 11:32:45,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:32:45,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:45,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:32:45,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:32:45,145 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 11 states. [2020-07-07 11:32:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:45,646 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-07-07 11:32:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:32:45,648 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-07 11:32:45,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:45,649 INFO L225 Difference]: With dead ends: 79 [2020-07-07 11:32:45,649 INFO L226 Difference]: Without dead ends: 68 [2020-07-07 11:32:45,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:32:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-07 11:32:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2020-07-07 11:32:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-07 11:32:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-07 11:32:45,659 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 28 [2020-07-07 11:32:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:45,659 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-07 11:32:45,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:32:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-07 11:32:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 11:32:45,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:45,661 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 11:32:45,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:45,865 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:45,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:45,866 INFO L82 PathProgramCache]: Analyzing trace with hash 913238305, now seen corresponding path program 1 times [2020-07-07 11:32:45,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:45,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680573778] [2020-07-07 11:32:45,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:45,876 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:32:45,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070444581] [2020-07-07 11:32:45,876 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 11:32:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:45,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 11:32:45,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:45,994 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 11:32:45,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680573778] [2020-07-07 11:32:45,994 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:32:45,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070444581] [2020-07-07 11:32:45,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:45,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 11:32:45,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128889200] [2020-07-07 11:32:45,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:32:45,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:45,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:32:45,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:32:45,998 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 6 states. [2020-07-07 11:32:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:46,165 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-07-07 11:32:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:32:46,166 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-07 11:32:46,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:46,167 INFO L225 Difference]: With dead ends: 72 [2020-07-07 11:32:46,167 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 11:32:46,168 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 11:32:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 11:32:46,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-07-07 11:32:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-07 11:32:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-07-07 11:32:46,176 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 30 [2020-07-07 11:32:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:46,177 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-07-07 11:32:46,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:32:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-07-07 11:32:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 11:32:46,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:46,178 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 11:32:46,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:46,382 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:46,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:46,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2071122883, now seen corresponding path program 4 times [2020-07-07 11:32:46,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:46,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977926421] [2020-07-07 11:32:46,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:46,405 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:32:46,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742220996] [2020-07-07 11:32:46,405 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 11:32:46,444 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:32:46,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:46,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-07 11:32:46,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:46,458 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 11:32:46,459 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:46,469 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:46,475 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 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-07 11:32:46,475 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:46,482 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:46,483 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 11:32:46,483 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-07-07 11:32:46,571 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-07-07 11:32:46,572 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 11:32:46,574 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:46,643 INFO L624 ElimStorePlain]: treesize reduction 24, result has 67.1 percent of original size [2020-07-07 11:32:46,644 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:46,645 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 11:32:46,646 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-07-07 11:32:46,646 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:46,695 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:46,733 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:46,735 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:46,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:46,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:47,075 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-07-07 11:32:47,076 INFO L350 Elim1Store]: treesize reduction 17, result has 92.5 percent of original size [2020-07-07 11:32:47,076 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 11:32:47,079 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-07-07 11:32:47,079 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-07 11:32:47,080 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-07-07 11:32:47,080 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:32:47,081 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-07 11:32:47,082 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:32:47,082 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-07 11:32:47,083 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:47,084 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:47,084 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:47,087 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:47,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:47,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:47,184 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:47,184 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 11:32:47,187 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-07 11:32:47,187 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:32:47,189 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-07 11:32:47,189 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:47,190 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:47,190 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:47,192 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:47,578 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 45 [2020-07-07 11:32:47,579 INFO L624 ElimStorePlain]: treesize reduction 800, result has 14.5 percent of original size [2020-07-07 11:32:47,581 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:47,582 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 11:32:47,583 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:121, output treesize:101 [2020-07-07 11:32:47,583 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:47,713 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:47,813 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:47,884 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:48,135 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-07-07 11:32:48,137 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:48,158 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:48,159 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:48,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:48,170 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:48,181 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:48,221 INFO L350 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2020-07-07 11:32:48,222 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 11:32:48,224 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:48,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:48,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:48,278 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:48,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:48,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:48,350 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:48,412 INFO L244 Elim1Store]: Index analysis took 149 ms [2020-07-07 11:32:48,416 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 11:32:48,418 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:48,434 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:48,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:48,436 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:48,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:48,441 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 11:32:48,443 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:48,786 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-07-07 11:32:48,789 INFO L624 ElimStorePlain]: treesize reduction 53, result has 80.9 percent of original size [2020-07-07 11:32:48,790 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 11:32:48,790 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:212, output treesize:225 [2020-07-07 11:32:49,095 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-07 11:32:49,098 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 6, 1] term [2020-07-07 11:32:49,099 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:49,325 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-07 11:32:49,328 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:49,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,562 INFO L244 Elim1Store]: Index analysis took 192 ms [2020-07-07 11:32:49,666 INFO L350 Elim1Store]: treesize reduction 17, result has 81.7 percent of original size [2020-07-07 11:32:49,667 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 81 treesize of output 173 [2020-07-07 11:32:49,669 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:49,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:49,978 INFO L244 Elim1Store]: Index analysis took 269 ms [2020-07-07 11:32:49,990 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:49,991 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 85 treesize of output 100 [2020-07-07 11:32:49,993 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:50,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:50,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:50,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:50,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:50,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:50,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:50,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:50,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:50,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:50,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:50,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:50,064 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:50,065 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 87 treesize of output 109 [2020-07-07 11:32:50,067 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:50,380 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2020-07-07 11:32:50,380 INFO L624 ElimStorePlain]: treesize reduction 210, result has 53.6 percent of original size [2020-07-07 11:32:50,387 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 11:32:50,388 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:275, output treesize:243 [2020-07-07 11:32:54,578 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 99 [2020-07-07 11:32:58,958 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification that was a NOOP. DAG size: 102 [2020-07-07 11:32:58,961 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:58,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,006 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:59,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,024 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:59,096 INFO L350 Elim1Store]: treesize reduction 10, result has 81.5 percent of original size [2020-07-07 11:32:59,097 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 84 treesize of output 65 [2020-07-07 11:32:59,099 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:59,100 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,112 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:32:59,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,145 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:59,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,162 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:59,315 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-07-07 11:32:59,316 INFO L350 Elim1Store]: treesize reduction 17, result has 84.0 percent of original size [2020-07-07 11:32:59,317 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 11:32:59,319 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-07 11:32:59,319 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:59,320 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:59,321 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,322 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:59,322 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,323 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,324 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,332 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-07 11:32:59,333 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:59,333 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:59,334 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,335 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:59,335 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,336 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,336 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,341 INFO L544 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-07 11:32:59,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,367 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:32:59,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:59,473 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-07-07 11:32:59,474 INFO L350 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2020-07-07 11:32:59,474 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 11:32:59,476 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:59,477 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,478 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:59,478 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,482 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:59,483 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:59,490 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:59,491 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,491 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-07 11:32:59,491 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:59,492 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:59,492 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-07 11:32:59,499 INFO L544 ElimStorePlain]: Start of recursive call 4: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-07 11:32:59,730 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 74 [2020-07-07 11:32:59,732 INFO L624 ElimStorePlain]: treesize reduction 96, result has 60.2 percent of original size [2020-07-07 11:32:59,740 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 11:32:59,741 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 13 variables, input treesize:285, output treesize:7 [2020-07-07 11:32:59,888 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 11:32:59,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977926421] [2020-07-07 11:32:59,888 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:32:59,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742220996] [2020-07-07 11:32:59,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:32:59,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-07 11:32:59,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565246711] [2020-07-07 11:32:59,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:32:59,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:59,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:32:59,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2020-07-07 11:32:59,890 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 13 states. [2020-07-07 11:33:00,682 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-07-07 11:33:00,950 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2020-07-07 11:33:05,410 WARN L193 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2020-07-07 11:33:15,681 WARN L193 SmtUtils]: Spent 9.81 s on a formula simplification. DAG size of input: 143 DAG size of output: 126 [2020-07-07 11:33:28,115 WARN L193 SmtUtils]: Spent 10.26 s on a formula simplification. DAG size of input: 145 DAG size of output: 128 [2020-07-07 11:33:36,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:36,114 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-07-07 11:33:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:33:36,118 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-07-07 11:33:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:36,120 INFO L225 Difference]: With dead ends: 77 [2020-07-07 11:33:36,120 INFO L226 Difference]: Without dead ends: 75 [2020-07-07 11:33:36,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=65, Invalid=313, Unknown=2, NotChecked=0, Total=380 [2020-07-07 11:33:36,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-07 11:33:36,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-07-07 11:33:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:33:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-07-07 11:33:36,132 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 30 [2020-07-07 11:33:36,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:36,132 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-07-07 11:33:36,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:33:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-07-07 11:33:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-07 11:33:36,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:36,133 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 11:33:36,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 11:33:36,336 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:36,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1569644609, now seen corresponding path program 5 times [2020-07-07 11:33:36,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:36,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663074878] [2020-07-07 11:33:36,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:36,351 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:33:36,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588395439] [2020-07-07 11:33:36,351 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 11:33:36,400 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-07-07 11:33:36,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:33:36,401 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:33:36,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:36,486 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 11:33:36,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663074878] [2020-07-07 11:33:36,487 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:33:36,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588395439] [2020-07-07 11:33:36,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:33:36,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-07 11:33:36,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610120969] [2020-07-07 11:33:36,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:33:36,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:33:36,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:33:36,489 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 9 states. [2020-07-07 11:33:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:36,967 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-07-07 11:33:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:33:36,970 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-07-07 11:33:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:36,971 INFO L225 Difference]: With dead ends: 100 [2020-07-07 11:33:36,971 INFO L226 Difference]: Without dead ends: 89 [2020-07-07 11:33:36,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:33:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-07 11:33:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2020-07-07 11:33:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-07 11:33:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-07-07 11:33:36,991 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 32 [2020-07-07 11:33:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:36,992 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-07-07 11:33:36,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:33:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-07-07 11:33:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 11:33:36,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:36,995 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 11:33:37,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:37,211 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:37,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:37,212 INFO L82 PathProgramCache]: Analyzing trace with hash 890841693, now seen corresponding path program 1 times [2020-07-07 11:33:37,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:37,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569510933] [2020-07-07 11:33:37,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:37,222 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:33:37,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808930894] [2020-07-07 11:33:37,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:33:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:33:37,337 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:33:37,340 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:33:37,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:37,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:33:37 BoogieIcfgContainer [2020-07-07 11:33:37,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:33:37,617 INFO L168 Benchmark]: Toolchain (without parser) took 104012.25 ms. Allocated memory was 138.9 MB in the beginning and 283.1 MB in the end (delta: 144.2 MB). Free memory was 103.5 MB in the beginning and 112.5 MB in the end (delta: -9.0 MB). Peak memory consumption was 135.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:37,617 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-07 11:33:37,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.53 ms. Allocated memory is still 138.9 MB. Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:37,622 INFO L168 Benchmark]: Boogie Preprocessor took 127.68 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.9 MB in the beginning and 181.6 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:37,622 INFO L168 Benchmark]: RCFGBuilder took 333.54 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 164.5 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:37,623 INFO L168 Benchmark]: TraceAbstraction took 103279.97 ms. Allocated memory was 203.4 MB in the beginning and 283.1 MB in the end (delta: 79.7 MB). Free memory was 163.8 MB in the beginning and 112.5 MB in the end (delta: 51.3 MB). Peak memory consumption was 131.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:37,627 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.53 ms. Allocated memory is still 138.9 MB. Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.68 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.9 MB in the beginning and 181.6 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 333.54 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 164.5 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 103279.97 ms. Allocated memory was 203.4 MB in the beginning and 283.1 MB in the end (delta: 79.7 MB). Free memory was 163.8 MB in the beginning and 112.5 MB in the end (delta: 51.3 MB). Peak memory consumption was 131.0 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] = 1 [L30] b[0] = 1 [L31] i=1 VAL [\old(N)=0, a={-2:0}, b={-1:0}, i=1, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, N=2] [L31] COND TRUE i