/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-examples/standard_init9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:45:23,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:45:23,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:45:23,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:45:23,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:45:23,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:45:23,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:45:23,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:45:23,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:45:23,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:45:23,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:45:23,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:45:23,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:45:23,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:45:23,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:45:23,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:45:23,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:45:23,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:45:23,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:45:23,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:45:23,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:45:23,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:45:23,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:45:23,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:45:23,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:45:23,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:45:23,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:45:23,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:45:23,272 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 [2019-11-06 18:45:23,307 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:45:23,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:45:23,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:45:23,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:45:23,312 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:45:23,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:45:23,312 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:45:23,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:45:23,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:45:23,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:45:23,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:45:23,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:45:23,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:45:23,314 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:45:23,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:45:23,316 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:45:23,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:45:23,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:45:23,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:45:23,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:45:23,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:45:23,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:45:23,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:45:23,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:45:23,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:45:23,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:45:23,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:45:23,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:45:23,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:45:23,593 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:45:23,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:45:23,610 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:45:23,611 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:45:23,612 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:45:23,613 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2019-11-06 18:45:23,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85f8c38b4/d4022ac46a4d4c3aa9873f4bb4793256/FLAG8c1f2e6a4 [2019-11-06 18:45:24,127 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:45:24,128 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2019-11-06 18:45:24,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85f8c38b4/d4022ac46a4d4c3aa9873f4bb4793256/FLAG8c1f2e6a4 [2019-11-06 18:45:24,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85f8c38b4/d4022ac46a4d4c3aa9873f4bb4793256 [2019-11-06 18:45:24,557 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:45:24,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:45:24,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:45:24,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:45:24,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:45:24,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:45:24" (1/1) ... [2019-11-06 18:45:24,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@778299e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:24, skipping insertion in model container [2019-11-06 18:45:24,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:45:24" (1/1) ... [2019-11-06 18:45:24,577 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:45:24,601 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:45:24,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:45:24,847 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:45:24,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:45:24,969 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:45:24,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:24 WrapperNode [2019-11-06 18:45:24,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:45:24,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:45:24,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:45:24,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:45:24,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:24" (1/1) ... [2019-11-06 18:45:24,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:24" (1/1) ... [2019-11-06 18:45:24,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:24" (1/1) ... [2019-11-06 18:45:24,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:24" (1/1) ... [2019-11-06 18:45:25,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:24" (1/1) ... [2019-11-06 18:45:25,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:24" (1/1) ... [2019-11-06 18:45:25,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:24" (1/1) ... [2019-11-06 18:45:25,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:45:25,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:45:25,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:45:25,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:45:25,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:24" (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 [2019-11-06 18:45:25,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:45:25,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:45:25,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:45:25,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:45:25,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:45:25,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:45:25,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:45:25,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:45:25,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:45:25,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:45:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:45:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:45:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:45:25,417 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:45:25,417 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-06 18:45:25,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:45:25 BoogieIcfgContainer [2019-11-06 18:45:25,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:45:25,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:45:25,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:45:25,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:45:25,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:45:24" (1/3) ... [2019-11-06 18:45:25,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55cbc332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:45:25, skipping insertion in model container [2019-11-06 18:45:25,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:45:24" (2/3) ... [2019-11-06 18:45:25,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55cbc332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:45:25, skipping insertion in model container [2019-11-06 18:45:25,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:45:25" (3/3) ... [2019-11-06 18:45:25,426 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-2.i [2019-11-06 18:45:25,440 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:45:25,448 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:45:25,461 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:45:25,496 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:45:25,496 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:45:25,496 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:45:25,497 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:45:25,497 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:45:25,497 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:45:25,497 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:45:25,497 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:45:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-11-06 18:45:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:45:25,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:25,520 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:25,521 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:25,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1872712154, now seen corresponding path program 1 times [2019-11-06 18:45:25,533 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:25,534 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134421788] [2019-11-06 18:45:25,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:45:25,704 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134421788] [2019-11-06 18:45:25,705 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:45:25,705 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:45:25,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8506731] [2019-11-06 18:45:25,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:45:25,715 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:25,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:45:25,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:45:25,733 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-11-06 18:45:25,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:25,887 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2019-11-06 18:45:25,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:45:25,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-11-06 18:45:25,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:25,899 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:45:25,899 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:45:25,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:45:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:45:25,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-06 18:45:25,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:45:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-11-06 18:45:25,945 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 29 [2019-11-06 18:45:25,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:25,946 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-11-06 18:45:25,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:45:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-11-06 18:45:25,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:45:25,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:25,948 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:25,948 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1932733742, now seen corresponding path program 1 times [2019-11-06 18:45:25,949 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:25,949 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235283726] [2019-11-06 18:45:25,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:45:26,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235283726] [2019-11-06 18:45:26,070 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:45:26,071 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:45:26,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758975501] [2019-11-06 18:45:26,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:45:26,073 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:26,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:45:26,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:45:26,074 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2019-11-06 18:45:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:26,256 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2019-11-06 18:45:26,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:45:26,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-11-06 18:45:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:26,258 INFO L225 Difference]: With dead ends: 70 [2019-11-06 18:45:26,258 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:45:26,260 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:45:26,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:45:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-06 18:45:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:45:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-11-06 18:45:26,270 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2019-11-06 18:45:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:26,270 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-11-06 18:45:26,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:45:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-11-06 18:45:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:45:26,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:26,272 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:26,272 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:26,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:26,273 INFO L82 PathProgramCache]: Analyzing trace with hash 97911482, now seen corresponding path program 1 times [2019-11-06 18:45:26,273 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:26,273 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564994863] [2019-11-06 18:45:26,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:45:26,398 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564994863] [2019-11-06 18:45:26,398 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606071659] [2019-11-06 18:45:26,398 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 [2019-11-06 18:45:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:26,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:45:26,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:45:26,524 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:26,524 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:45:26,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667014403] [2019-11-06 18:45:26,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:45:26,537 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:26,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:45:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:45:26,538 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 6 states. [2019-11-06 18:45:26,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:26,721 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2019-11-06 18:45:26,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:45:26,722 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-11-06 18:45:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:26,723 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:45:26,723 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:45:26,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:45:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:45:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-06 18:45:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:45:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-11-06 18:45:26,733 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2019-11-06 18:45:26,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:26,734 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-11-06 18:45:26,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:45:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-11-06 18:45:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:45:26,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:26,737 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:26,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:26,938 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:26,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1965553710, now seen corresponding path program 2 times [2019-11-06 18:45:26,939 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:26,939 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990124429] [2019-11-06 18:45:26,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:45:27,050 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990124429] [2019-11-06 18:45:27,050 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271233184] [2019-11-06 18:45:27,050 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 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 [2019-11-06 18:45:27,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:45:27,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:27,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:45:27,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 18:45:27,130 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:27,130 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:45:27,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706520884] [2019-11-06 18:45:27,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:45:27,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:27,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:45:27,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:45:27,134 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 7 states. [2019-11-06 18:45:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:27,321 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2019-11-06 18:45:27,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:45:27,321 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-11-06 18:45:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:27,322 INFO L225 Difference]: With dead ends: 104 [2019-11-06 18:45:27,322 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 18:45:27,323 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:45:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 18:45:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-06 18:45:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:45:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2019-11-06 18:45:27,333 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 47 [2019-11-06 18:45:27,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:27,334 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2019-11-06 18:45:27,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:45:27,334 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2019-11-06 18:45:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:45:27,336 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:27,336 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:27,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:27,540 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:27,541 INFO L82 PathProgramCache]: Analyzing trace with hash 369658042, now seen corresponding path program 3 times [2019-11-06 18:45:27,541 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:27,541 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685206644] [2019-11-06 18:45:27,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-06 18:45:27,676 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685206644] [2019-11-06 18:45:27,677 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274039729] [2019-11-06 18:45:27,677 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 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 [2019-11-06 18:45:27,786 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:45:27,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:27,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:45:27,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-06 18:45:27,819 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:27,819 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:45:27,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097353860] [2019-11-06 18:45:27,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:45:27,821 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:27,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:45:27,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:45:27,821 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 8 states. [2019-11-06 18:45:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:28,044 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2019-11-06 18:45:28,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:45:28,045 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-11-06 18:45:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:28,046 INFO L225 Difference]: With dead ends: 121 [2019-11-06 18:45:28,046 INFO L226 Difference]: Without dead ends: 70 [2019-11-06 18:45:28,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:45:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-06 18:45:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-11-06 18:45:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-06 18:45:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-11-06 18:45:28,069 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 56 [2019-11-06 18:45:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:28,070 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-11-06 18:45:28,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:45:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-11-06 18:45:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 18:45:28,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:28,074 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:28,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:28,291 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash 24657106, now seen corresponding path program 4 times [2019-11-06 18:45:28,292 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:28,292 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158734010] [2019-11-06 18:45:28,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 18:45:28,459 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158734010] [2019-11-06 18:45:28,461 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840586073] [2019-11-06 18:45:28,461 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 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 [2019-11-06 18:45:28,532 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:45:28,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:28,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:45:28,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 18:45:28,555 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:28,555 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:45:28,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030334280] [2019-11-06 18:45:28,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:45:28,556 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:28,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:45:28,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:45:28,557 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 9 states. [2019-11-06 18:45:28,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:28,754 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2019-11-06 18:45:28,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:45:28,754 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2019-11-06 18:45:28,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:28,755 INFO L225 Difference]: With dead ends: 138 [2019-11-06 18:45:28,756 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:45:28,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:45:28,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:45:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-11-06 18:45:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:45:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2019-11-06 18:45:28,779 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 65 [2019-11-06 18:45:28,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:28,782 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2019-11-06 18:45:28,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:45:28,783 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2019-11-06 18:45:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 18:45:28,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:28,788 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:28,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:28,993 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:28,993 INFO L82 PathProgramCache]: Analyzing trace with hash -217477446, now seen corresponding path program 5 times [2019-11-06 18:45:28,994 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:28,994 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104671656] [2019-11-06 18:45:28,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-06 18:45:29,130 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104671656] [2019-11-06 18:45:29,131 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689738288] [2019-11-06 18:45:29,132 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 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