/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/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:58:39,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:58:39,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:58:39,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:58:39,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:58:39,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:58:39,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:58:39,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:58:39,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:58:39,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:58:39,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:58:39,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:58:39,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:58:39,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:58:39,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:58:39,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:58:39,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:58:39,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:58:39,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:58:39,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:58:39,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:58:39,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:58:39,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:58:39,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:58:39,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:58:39,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:58:39,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:58:39,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:58:39,780 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 [2020-08-22 16:58:39,811 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:58:39,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:58:39,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:58:39,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:58:39,813 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:58:39,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:58:39,814 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:58:39,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:58:39,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:58:39,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:58:39,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:58:39,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:58:39,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:58:39,815 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:58:39,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:58:39,815 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:58:39,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:58:39,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:58:39,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:58:39,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:58:39,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:58:39,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:58:39,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:58:39,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:58:39,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:58:39,817 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:58:39,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:58:39,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:58:39,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:58:39,818 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:58:40,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:58:40,108 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:58:40,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:58:40,112 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:58:40,113 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:58:40,113 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-08-22 16:58:40,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79e2160e/2538efab0a55475895ecc03cb165f82e/FLAG6317ce60c [2020-08-22 16:58:40,661 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:58:40,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-08-22 16:58:40,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79e2160e/2538efab0a55475895ecc03cb165f82e/FLAG6317ce60c [2020-08-22 16:58:41,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79e2160e/2538efab0a55475895ecc03cb165f82e [2020-08-22 16:58:41,042 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:58:41,044 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:58:41,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:58:41,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:58:41,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:58:41,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:58:41" (1/1) ... [2020-08-22 16:58:41,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71172dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:41, skipping insertion in model container [2020-08-22 16:58:41,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:58:41" (1/1) ... [2020-08-22 16:58:41,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:58:41,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:58:41,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:58:41,293 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:58:41,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:58:41,323 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:58:41,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:41 WrapperNode [2020-08-22 16:58:41,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:58:41,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:58:41,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:58:41,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:58:41,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:41" (1/1) ... [2020-08-22 16:58:41,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:41" (1/1) ... [2020-08-22 16:58:41,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:41" (1/1) ... [2020-08-22 16:58:41,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:41" (1/1) ... [2020-08-22 16:58:41,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:41" (1/1) ... [2020-08-22 16:58:41,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:41" (1/1) ... [2020-08-22 16:58:41,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:41" (1/1) ... [2020-08-22 16:58:41,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:58:41,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:58:41,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:58:41,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:58:41,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:41" (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 [2020-08-22 16:58:41,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:58:41,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:58:41,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:58:41,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:58:41,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:58:41,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:58:41,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:58:41,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:58:41,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:58:41,720 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:58:41,720 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-22 16:58:41,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:58:41 BoogieIcfgContainer [2020-08-22 16:58:41,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:58:41,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:58:41,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:58:41,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:58:41,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:58:41" (1/3) ... [2020-08-22 16:58:41,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78086bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:58:41, skipping insertion in model container [2020-08-22 16:58:41,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:41" (2/3) ... [2020-08-22 16:58:41,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78086bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:58:41, skipping insertion in model container [2020-08-22 16:58:41,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:58:41" (3/3) ... [2020-08-22 16:58:41,733 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2020-08-22 16:58:41,744 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:58:41,751 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:58:41,767 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:58:41,832 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:58:41,832 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:58:41,833 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:58:41,833 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:58:41,833 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:58:41,833 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:58:41,834 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:58:41,834 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:58:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-22 16:58:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 16:58:41,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:41,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:41,866 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:41,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2037426592, now seen corresponding path program 1 times [2020-08-22 16:58:41,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:41,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137807036] [2020-08-22 16:58:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:41,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:42,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137807036] [2020-08-22 16:58:42,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:58:42,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 16:58:42,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895476736] [2020-08-22 16:58:42,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 16:58:42,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:42,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 16:58:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 16:58:42,032 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-22 16:58:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:42,058 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2020-08-22 16:58:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 16:58:42,060 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-22 16:58:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:42,069 INFO L225 Difference]: With dead ends: 49 [2020-08-22 16:58:42,069 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 16:58:42,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 16:58:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 16:58:42,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-22 16:58:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 16:58:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-22 16:58:42,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-08-22 16:58:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:42,115 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-22 16:58:42,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 16:58:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-22 16:58:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 16:58:42,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:42,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:42,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:58:42,120 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:42,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2031885466, now seen corresponding path program 1 times [2020-08-22 16:58:42,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:42,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114413062] [2020-08-22 16:58:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:42,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:42,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114413062] [2020-08-22 16:58:42,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:58:42,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:58:42,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532384159] [2020-08-22 16:58:42,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:58:42,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:42,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:58:42,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:58:42,266 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-08-22 16:58:42,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:42,305 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-22 16:58:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:58:42,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-08-22 16:58:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:42,308 INFO L225 Difference]: With dead ends: 48 [2020-08-22 16:58:42,308 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 16:58:42,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:58:42,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 16:58:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-08-22 16:58:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 16:58:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-22 16:58:42,316 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2020-08-22 16:58:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:42,317 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-22 16:58:42,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:58:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-22 16:58:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 16:58:42,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:42,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:42,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:58:42,319 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:42,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:42,319 INFO L82 PathProgramCache]: Analyzing trace with hash -935219944, now seen corresponding path program 1 times [2020-08-22 16:58:42,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:42,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728946156] [2020-08-22 16:58:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:42,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:42,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728946156] [2020-08-22 16:58:42,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538748145] [2020-08-22 16:58:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:42,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:58:42,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:58:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:42,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:58:42,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-08-22 16:58:42,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906344011] [2020-08-22 16:58:42,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:58:42,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:42,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:58:42,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:58:42,538 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-08-22 16:58:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:42,579 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-08-22 16:58:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:58:42,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 16:58:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:42,581 INFO L225 Difference]: With dead ends: 51 [2020-08-22 16:58:42,581 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 16:58:42,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:58:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 16:58:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-08-22 16:58:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 16:58:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-08-22 16:58:42,588 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2020-08-22 16:58:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:42,588 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-08-22 16:58:42,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:58:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-08-22 16:58:42,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 16:58:42,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:42,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:42,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-08-22 16:58:42,802 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:42,802 INFO L82 PathProgramCache]: Analyzing trace with hash -465234410, now seen corresponding path program 2 times [2020-08-22 16:58:42,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:42,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596031460] [2020-08-22 16:58:42,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:42,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:42,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596031460] [2020-08-22 16:58:42,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297024994] [2020-08-22 16:58:42,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-08-22 16:58:42,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:58:42,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:58:42,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:58:42,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:58:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:43,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:58:43,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-08-22 16:58:43,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811107453] [2020-08-22 16:58:43,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:58:43,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:58:43,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:58:43,003 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-08-22 16:58:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:43,066 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-22 16:58:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:58:43,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-22 16:58:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:43,071 INFO L225 Difference]: With dead ends: 55 [2020-08-22 16:58:43,071 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 16:58:43,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:58:43,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 16:58:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-08-22 16:58:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 16:58:43,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-22 16:58:43,082 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-08-22 16:58:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:43,085 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-22 16:58:43,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:58:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-22 16:58:43,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:58:43,087 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:43,088 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:43,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:43,303 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:43,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:43,304 INFO L82 PathProgramCache]: Analyzing trace with hash 219297684, now seen corresponding path program 3 times [2020-08-22 16:58:43,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:43,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62539235] [2020-08-22 16:58:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:43,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:43,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62539235] [2020-08-22 16:58:43,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351863282] [2020-08-22 16:58:43,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true