/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_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:42:41,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:42:41,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:42:41,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:42:41,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:42:41,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:42:41,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:42:41,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:42:41,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:42:41,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:42:41,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:42:41,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:42:41,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:42:41,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:42:41,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:42:41,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:42:41,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:42:41,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:42:41,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:42:41,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:42:41,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:42:41,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:42:41,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:42:41,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:42:41,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:42:41,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:42:41,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:42:41,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:42:41,847 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 18:42:41,861 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:42:41,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:42:41,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:42:41,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:42:41,862 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:42:41,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:42:41,863 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:42:41,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:42:41,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:42:41,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:42:41,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:42:41,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:42:41,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:42:41,864 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:42:41,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:42:41,865 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:42:41,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:42:41,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:42:41,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:42:41,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:42:41,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:42:41,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:42:41,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:42:41,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:42:41,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:42:41,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:42:41,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:42:41,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:42:41,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:42:42,150 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:42:42,163 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:42:42,166 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:42:42,168 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:42:42,168 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:42:42,169 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2019-11-06 18:42:42,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daabaf8e7/42beaaa52f804da6bb3e6a6e1bf22ca2/FLAG6886bf19c [2019-11-06 18:42:42,697 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:42:42,697 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2019-11-06 18:42:42,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daabaf8e7/42beaaa52f804da6bb3e6a6e1bf22ca2/FLAG6886bf19c [2019-11-06 18:42:43,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daabaf8e7/42beaaa52f804da6bb3e6a6e1bf22ca2 [2019-11-06 18:42:43,085 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:42:43,087 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:42:43,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:43,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:42:43,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:42:43,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:43" (1/1) ... [2019-11-06 18:42:43,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19891321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:43, skipping insertion in model container [2019-11-06 18:42:43,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:43" (1/1) ... [2019-11-06 18:42:43,104 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:42:43,121 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:42:43,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:43,326 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:42:43,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:43,453 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:42:43,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:43 WrapperNode [2019-11-06 18:42:43,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:43,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:42:43,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:42:43,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:42:43,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:43" (1/1) ... [2019-11-06 18:42:43,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:43" (1/1) ... [2019-11-06 18:42:43,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:43" (1/1) ... [2019-11-06 18:42:43,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:43" (1/1) ... [2019-11-06 18:42:43,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:43" (1/1) ... [2019-11-06 18:42:43,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:43" (1/1) ... [2019-11-06 18:42:43,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:43" (1/1) ... [2019-11-06 18:42:43,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:42:43,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:42:43,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:42:43,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:42:43,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:43" (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 18:42:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:42:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:42:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:42:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:42:43,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:42:43,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:42:43,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:42:43,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:42:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:42:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:42:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:42:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:42:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:42:43,873 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:42:43,874 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 18:42:43,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:43 BoogieIcfgContainer [2019-11-06 18:42:43,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:42:43,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:42:43,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:42:43,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:42:43,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:42:43" (1/3) ... [2019-11-06 18:42:43,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa722a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:43, skipping insertion in model container [2019-11-06 18:42:43,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:43" (2/3) ... [2019-11-06 18:42:43,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa722a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:43, skipping insertion in model container [2019-11-06 18:42:43,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:43" (3/3) ... [2019-11-06 18:42:43,898 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2019-11-06 18:42:43,914 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:42:43,923 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:42:43,934 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:42:43,963 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:42:43,963 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:42:43,963 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:42:43,963 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:42:43,963 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:42:43,964 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:42:43,964 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:42:43,964 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:42:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-06 18:42:43,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:42:43,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:43,985 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:43,986 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:43,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:43,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1001985310, now seen corresponding path program 1 times [2019-11-06 18:42:43,997 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:43,998 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751518178] [2019-11-06 18:42:43,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:44,186 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 18:42:44,187 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751518178] [2019-11-06 18:42:44,188 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:44,188 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:42:44,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708690853] [2019-11-06 18:42:44,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:42:44,195 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:44,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:42:44,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:42:44,213 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-11-06 18:42:44,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:44,397 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2019-11-06 18:42:44,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:42:44,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-06 18:42:44,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:44,410 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:42:44,410 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:42:44,422 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 18:42:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:42:44,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-06 18:42:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:42:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-06 18:42:44,476 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2019-11-06 18:42:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:44,477 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-06 18:42:44,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:42:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-06 18:42:44,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:42:44,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:44,481 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:44,482 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:44,483 INFO L82 PathProgramCache]: Analyzing trace with hash -400143846, now seen corresponding path program 1 times [2019-11-06 18:42:44,483 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:44,484 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915294904] [2019-11-06 18:42:44,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:44,612 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 18:42:44,617 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915294904] [2019-11-06 18:42:44,618 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:44,618 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:42:44,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904631890] [2019-11-06 18:42:44,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:42:44,621 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:44,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:42:44,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:44,622 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2019-11-06 18:42:44,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:44,727 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 18:42:44,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:42:44,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-06 18:42:44,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:44,729 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:42:44,729 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:42:44,731 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 18:42:44,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:42:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-11-06 18:42:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:42:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-06 18:42:44,739 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2019-11-06 18:42:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:44,740 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-06 18:42:44,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:42:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-06 18:42:44,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:42:44,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:44,741 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] [2019-11-06 18:42:44,741 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1150570790, now seen corresponding path program 1 times [2019-11-06 18:42:44,742 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:44,742 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775797723] [2019-11-06 18:42:44,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:42:44,844 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775797723] [2019-11-06 18:42:44,844 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024319374] [2019-11-06 18:42:44,844 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 18:42:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:44,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:42:44,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:42:44,956 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:44,956 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:42:44,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970283337] [2019-11-06 18:42:44,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:42:44,961 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:42:44,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:42:44,962 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2019-11-06 18:42:45,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:45,091 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-11-06 18:42:45,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:42:45,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-11-06 18:42:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:45,093 INFO L225 Difference]: With dead ends: 53 [2019-11-06 18:42:45,093 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:42:45,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 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 18:42:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:42:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-11-06 18:42:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:42:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-11-06 18:42:45,102 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2019-11-06 18:42:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:45,103 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-11-06 18:42:45,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:42:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-11-06 18:42:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:42:45,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:45,104 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:45,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:45,309 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:45,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1868122094, now seen corresponding path program 2 times [2019-11-06 18:42:45,311 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:45,312 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641675643] [2019-11-06 18:42:45,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:42:45,428 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641675643] [2019-11-06 18:42:45,429 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418235007] [2019-11-06 18:42:45,429 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 18:42:45,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:42:45,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:45,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:42:45,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:42:45,510 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:45,510 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:42:45,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016903303] [2019-11-06 18:42:45,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:42:45,511 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:45,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:42:45,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:42:45,512 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2019-11-06 18:42:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:45,628 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-11-06 18:42:45,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:42:45,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-11-06 18:42:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:45,630 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:42:45,630 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 18:42:45,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 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 18:42:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 18:42:45,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-11-06 18:42:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 18:42:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2019-11-06 18:42:45,637 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2019-11-06 18:42:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:45,638 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2019-11-06 18:42:45,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:42:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2019-11-06 18:42:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:42:45,639 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:45,639 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:45,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:45,853 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash 150752210, now seen corresponding path program 3 times [2019-11-06 18:42:45,855 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:45,855 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860437385] [2019-11-06 18:42:45,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:42:45,981 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860437385] [2019-11-06 18:42:45,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810282629] [2019-11-06 18:42:45,983 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 18:42:46,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:42:46,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:46,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:42:46,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:42:46,066 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:46,066 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:42:46,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163090663] [2019-11-06 18:42:46,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:42:46,067 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:46,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:42:46,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:42:46,070 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 8 states. [2019-11-06 18:42:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:46,218 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2019-11-06 18:42:46,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:42:46,219 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-11-06 18:42:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:46,220 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:42:46,220 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 18:42:46,220 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 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 18:42:46,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 18:42:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-11-06 18:42:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:42:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-11-06 18:42:46,235 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2019-11-06 18:42:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:46,236 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-11-06 18:42:46,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:42:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-11-06 18:42:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:42:46,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:46,238 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:46,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:46,445 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:46,447 INFO L82 PathProgramCache]: Analyzing trace with hash -125121014, now seen corresponding path program 4 times [2019-11-06 18:42:46,447 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:46,447 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964415798] [2019-11-06 18:42:46,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-06 18:42:46,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964415798] [2019-11-06 18:42:46,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601731117] [2019-11-06 18:42:46,571 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 18:42:46,623 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:42:46,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:46,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:42:46,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-06 18:42:46,645 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:46,645 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:42:46,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270234271] [2019-11-06 18:42:46,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:42:46,646 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:46,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:42:46,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:42:46,647 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 9 states. [2019-11-06 18:42:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:46,759 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:42:46,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:42:46,760 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-11-06 18:42:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:46,761 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:42:46,761 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 18:42:46,762 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 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 18:42:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 18:42:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-11-06 18:42:46,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 18:42:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-11-06 18:42:46,775 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2019-11-06 18:42:46,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:46,777 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-11-06 18:42:46,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:42:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-11-06 18:42:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:42:46,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:46,782 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:46,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:46,983 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:46,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1558523702, now seen corresponding path program 5 times [2019-11-06 18:42:46,984 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:46,984 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203245942] [2019-11-06 18:42:46,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-06 18:42:47,128 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203245942] [2019-11-06 18:42:47,128 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286386847] [2019-11-06 18:42:47,128 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 [2019-11-06 18:42:47,448 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:42:47,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:47,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:42:47,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 18:42:47,499 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:47,499 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:42:47,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970508545] [2019-11-06 18:42:47,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:42:47,500 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:42:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:42:47,501 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 10 states. [2019-11-06 18:42:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:47,652 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2019-11-06 18:42:47,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:42:47,652 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2019-11-06 18:42:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:47,653 INFO L225 Difference]: With dead ends: 89 [2019-11-06 18:42:47,653 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:42:47,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:42:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:42:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-11-06 18:42:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:42:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-11-06 18:42:47,661 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2019-11-06 18:42:47,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:47,661 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-11-06 18:42:47,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:42:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-11-06 18:42:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:42:47,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:47,662 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:47,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:47,875 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:47,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1349350398, now seen corresponding path program 6 times [2019-11-06 18:42:47,877 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:47,877 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692387509] [2019-11-06 18:42:47,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:42:47,988 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692387509] [2019-11-06 18:42:47,988 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617026545] [2019-11-06 18:42:47,988 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:48,235 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:42:48,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:48,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:42:48,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-06 18:42:48,264 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:48,264 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:42:48,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396709479] [2019-11-06 18:42:48,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:42:48,265 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:48,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:42:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:42:48,266 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 11 states. [2019-11-06 18:42:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:48,392 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-11-06 18:42:48,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:42:48,392 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2019-11-06 18:42:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:48,394 INFO L225 Difference]: With dead ends: 98 [2019-11-06 18:42:48,394 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:42:48,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:42:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:42:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 18:42:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:42:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2019-11-06 18:42:48,403 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2019-11-06 18:42:48,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:48,404 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2019-11-06 18:42:48,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:42:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2019-11-06 18:42:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:42:48,405 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:48,405 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:48,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:48,609 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:48,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1128841790, now seen corresponding path program 7 times [2019-11-06 18:42:48,610 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:48,611 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695754117] [2019-11-06 18:42:48,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 18:42:48,756 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695754117] [2019-11-06 18:42:48,756 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287693926] [2019-11-06 18:42:48,756 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:48,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:42:48,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 18:42:48,831 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:48,831 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:42:48,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79738676] [2019-11-06 18:42:48,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:42:48,832 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:48,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:42:48,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:42:48,833 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 12 states. [2019-11-06 18:42:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:48,992 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2019-11-06 18:42:48,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:42:48,993 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2019-11-06 18:42:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:48,993 INFO L225 Difference]: With dead ends: 107 [2019-11-06 18:42:48,994 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 18:42:48,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:42:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 18:42:49,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-06 18:42:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 18:42:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2019-11-06 18:42:49,007 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 52 [2019-11-06 18:42:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:49,009 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2019-11-06 18:42:49,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:42:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2019-11-06 18:42:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 18:42:49,010 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:49,022 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:49,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:49,226 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:49,227 INFO L82 PathProgramCache]: Analyzing trace with hash -612503046, now seen corresponding path program 8 times [2019-11-06 18:42:49,227 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:49,228 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327449775] [2019-11-06 18:42:49,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-06 18:42:49,383 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327449775] [2019-11-06 18:42:49,383 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659486266] [2019-11-06 18:42:49,383 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:49,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:42:49,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:49,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:42:49,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-06 18:42:49,465 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:49,466 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:42:49,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570172714] [2019-11-06 18:42:49,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:42:49,466 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:49,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:42:49,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:42:49,467 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 13 states. [2019-11-06 18:42:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:49,609 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2019-11-06 18:42:49,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:42:49,610 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2019-11-06 18:42:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:49,611 INFO L225 Difference]: With dead ends: 116 [2019-11-06 18:42:49,611 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 18:42:49,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:42:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 18:42:49,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-11-06 18:42:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 18:42:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2019-11-06 18:42:49,618 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2019-11-06 18:42:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:49,619 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2019-11-06 18:42:49,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:42:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2019-11-06 18:42:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 18:42:49,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:49,620 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:49,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:49,832 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:49,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:49,832 INFO L82 PathProgramCache]: Analyzing trace with hash -490630470, now seen corresponding path program 9 times [2019-11-06 18:42:49,832 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:49,832 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292971420] [2019-11-06 18:42:49,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-06 18:42:49,955 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292971420] [2019-11-06 18:42:49,955 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675958968] [2019-11-06 18:42:49,955 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:50,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:42:50,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:50,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 18:42:50,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-06 18:42:50,271 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:50,272 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:42:50,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132849858] [2019-11-06 18:42:50,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:42:50,273 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:50,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:42:50,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:42:50,273 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 14 states. [2019-11-06 18:42:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:50,487 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2019-11-06 18:42:50,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:42:50,488 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2019-11-06 18:42:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:50,489 INFO L225 Difference]: With dead ends: 125 [2019-11-06 18:42:50,489 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:42:50,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:42:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:42:50,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2019-11-06 18:42:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-06 18:42:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2019-11-06 18:42:50,496 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 62 [2019-11-06 18:42:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:50,497 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2019-11-06 18:42:50,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:42:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2019-11-06 18:42:50,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 18:42:50,498 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:50,498 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:50,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:50,703 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:50,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:50,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1207107598, now seen corresponding path program 10 times [2019-11-06 18:42:50,703 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:50,704 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773419501] [2019-11-06 18:42:50,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-06 18:42:50,882 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773419501] [2019-11-06 18:42:50,882 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608453747] [2019-11-06 18:42:50,882 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:50,943 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:42:50,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:50,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:42:50,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-06 18:42:50,985 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:50,985 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:42:50,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741434809] [2019-11-06 18:42:50,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:42:50,986 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:42:50,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:42:50,987 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 15 states. [2019-11-06 18:42:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:51,192 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 18:42:51,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:42:51,193 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2019-11-06 18:42:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:51,194 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:42:51,194 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:42:51,195 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:42:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:42:51,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 18:42:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:42:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2019-11-06 18:42:51,211 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2019-11-06 18:42:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:51,211 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2019-11-06 18:42:51,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:42:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2019-11-06 18:42:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-06 18:42:51,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:51,219 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:51,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:51,426 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:51,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2083114930, now seen corresponding path program 11 times [2019-11-06 18:42:51,427 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:51,427 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015895129] [2019-11-06 18:42:51,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-11-06 18:42:51,598 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015895129] [2019-11-06 18:42:51,598 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339669448] [2019-11-06 18:42:51,599 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:23,303 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:43:23,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:23,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:43:23,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:43:23,357 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:23,357 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:43:23,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445678492] [2019-11-06 18:43:23,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:43:23,358 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:23,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:43:23,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:43:23,359 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 16 states. [2019-11-06 18:43:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:23,572 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2019-11-06 18:43:23,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:43:23,572 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2019-11-06 18:43:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:23,574 INFO L225 Difference]: With dead ends: 143 [2019-11-06 18:43:23,574 INFO L226 Difference]: Without dead ends: 84 [2019-11-06 18:43:23,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:43:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-06 18:43:23,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2019-11-06 18:43:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-06 18:43:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2019-11-06 18:43:23,581 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 72 [2019-11-06 18:43:23,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:23,582 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2019-11-06 18:43:23,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:43:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2019-11-06 18:43:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-06 18:43:23,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:23,583 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:23,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:23,798 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:23,798 INFO L82 PathProgramCache]: Analyzing trace with hash 385857002, now seen corresponding path program 12 times [2019-11-06 18:43:23,798 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:23,798 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489436415] [2019-11-06 18:43:23,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-06 18:43:23,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489436415] [2019-11-06 18:43:23,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341530089] [2019-11-06 18:43:23,953 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:34,873 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:43:34,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:34,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 18:43:34,885 INFO L279 TraceCheckSpWp]: Computing forward predicates...