/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:29:24,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:29:24,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:29:24,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:29:24,655 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:29:24,673 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:29:24,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:29:24,674 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:29:24,675 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:29:24,675 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:29:24,675 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:29:24,675 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:29:24,675 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:29:24,676 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:29:24,676 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:29:24,676 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:29:24,676 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:29:24,676 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:29:24,677 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:29:24,677 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:29:24,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:29:24,678 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:29:24,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:29:24,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:29:24,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:29:24,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:29:24,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:29:24,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:29:24,679 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:29:24,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:29:24,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:29:24,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:29:24,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:29:24,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:29:24,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:29:24,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:29:24,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:29:24,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:29:24,682 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:29:24,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:29:24,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:29:24,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:29:24,682 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:29:24,952 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:29:24,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:29:24,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:29:24,970 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:29:24,970 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:29:24,971 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2.c [2019-11-24 04:29:25,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/760cddb93/13e3827f33894b7fb4688218982506e4/FLAGc802f3e2c [2019-11-24 04:29:25,480 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:29:25,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2.c [2019-11-24 04:29:25,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/760cddb93/13e3827f33894b7fb4688218982506e4/FLAGc802f3e2c [2019-11-24 04:29:25,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/760cddb93/13e3827f33894b7fb4688218982506e4 [2019-11-24 04:29:25,889 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:29:25,890 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:29:25,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:29:25,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:29:25,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:29:25,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:29:25" (1/1) ... [2019-11-24 04:29:25,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b1881e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:25, skipping insertion in model container [2019-11-24 04:29:25,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:29:25" (1/1) ... [2019-11-24 04:29:25,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:29:25,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:29:26,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:29:26,124 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:29:26,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:29:26,160 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:29:26,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:26 WrapperNode [2019-11-24 04:29:26,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:29:26,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:29:26,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:29:26,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:29:26,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:26" (1/1) ... [2019-11-24 04:29:26,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:26" (1/1) ... [2019-11-24 04:29:26,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:29:26,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:29:26,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:29:26,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:29:26,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:26" (1/1) ... [2019-11-24 04:29:26,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:26" (1/1) ... [2019-11-24 04:29:26,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:26" (1/1) ... [2019-11-24 04:29:26,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:26" (1/1) ... [2019-11-24 04:29:26,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:26" (1/1) ... [2019-11-24 04:29:26,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:26" (1/1) ... [2019-11-24 04:29:26,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:26" (1/1) ... [2019-11-24 04:29:26,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:29:26,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:29:26,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:29:26,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:29:26,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:26" (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 [2019-11-24 04:29:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:29:26,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:29:26,673 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:29:26,673 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-24 04:29:26,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:29:26 BoogieIcfgContainer [2019-11-24 04:29:26,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:29:26,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:29:26,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:29:26,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:29:26,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:29:25" (1/3) ... [2019-11-24 04:29:26,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460e2c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:29:26, skipping insertion in model container [2019-11-24 04:29:26,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:26" (2/3) ... [2019-11-24 04:29:26,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460e2c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:29:26, skipping insertion in model container [2019-11-24 04:29:26,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:29:26" (3/3) ... [2019-11-24 04:29:26,683 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd2.c [2019-11-24 04:29:26,703 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:29:26,716 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-24 04:29:26,738 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-24 04:29:26,769 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:29:26,770 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:29:26,770 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:29:26,770 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:29:26,770 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:29:26,770 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:29:26,770 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:29:26,771 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:29:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-24 04:29:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:29:26,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:29:26,796 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:29:26,797 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:29:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:29:26,803 INFO L82 PathProgramCache]: Analyzing trace with hash 32849638, now seen corresponding path program 1 times [2019-11-24 04:29:26,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:29:26,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604271793] [2019-11-24 04:29:26,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:29:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:26,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604271793] [2019-11-24 04:29:26,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:29:26,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:29:26,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068439734] [2019-11-24 04:29:26,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:29:26,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:29:26,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:29:26,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:29:26,961 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-11-24 04:29:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:29:26,984 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2019-11-24 04:29:26,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:29:26,986 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-24 04:29:26,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:29:26,998 INFO L225 Difference]: With dead ends: 61 [2019-11-24 04:29:26,998 INFO L226 Difference]: Without dead ends: 29 [2019-11-24 04:29:27,002 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:29:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-24 04:29:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-24 04:29:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-24 04:29:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-24 04:29:27,044 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 5 [2019-11-24 04:29:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:29:27,045 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-24 04:29:27,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:29:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-24 04:29:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:29:27,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:29:27,047 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:29:27,047 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:29:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:29:27,048 INFO L82 PathProgramCache]: Analyzing trace with hash 925834863, now seen corresponding path program 1 times [2019-11-24 04:29:27,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:29:27,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210583526] [2019-11-24 04:29:27,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:29:27,062 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:29:27,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800582493] [2019-11-24 04:29:27,063 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 [2019-11-24 04:29:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:27,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:29:27,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:29:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:27,158 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:29:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:27,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210583526] [2019-11-24 04:29:27,166 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:29:27,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800582493] [2019-11-24 04:29:27,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:29:27,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-24 04:29:27,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076825100] [2019-11-24 04:29:27,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:29:27,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:29:27,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:29:27,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:29:27,171 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 3 states. [2019-11-24 04:29:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:29:27,234 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2019-11-24 04:29:27,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:29:27,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-24 04:29:27,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:29:27,237 INFO L225 Difference]: With dead ends: 57 [2019-11-24 04:29:27,237 INFO L226 Difference]: Without dead ends: 49 [2019-11-24 04:29:27,239 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:29:27,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-24 04:29:27,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2019-11-24 04:29:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-24 04:29:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-11-24 04:29:27,255 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 6 [2019-11-24 04:29:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:29:27,255 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-11-24 04:29:27,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:29:27,256 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-11-24 04:29:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:29:27,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:29:27,257 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:29:27,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:27,467 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:29:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:29:27,468 INFO L82 PathProgramCache]: Analyzing trace with hash 925838837, now seen corresponding path program 1 times [2019-11-24 04:29:27,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:29:27,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877853319] [2019-11-24 04:29:27,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:29:27,491 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:29:27,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873416175] [2019-11-24 04:29:27,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:27,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-24 04:29:27,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:29:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:27,555 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:29:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:27,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877853319] [2019-11-24 04:29:27,585 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:29:27,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873416175] [2019-11-24 04:29:27,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:29:27,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-11-24 04:29:27,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650323443] [2019-11-24 04:29:27,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:29:27,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:29:27,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:29:27,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:29:27,588 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 5 states. [2019-11-24 04:29:27,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:29:27,722 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-11-24 04:29:27,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:29:27,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-24 04:29:27,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:29:27,726 INFO L225 Difference]: With dead ends: 50 [2019-11-24 04:29:27,726 INFO L226 Difference]: Without dead ends: 48 [2019-11-24 04:29:27,727 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:29:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-24 04:29:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2019-11-24 04:29:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-24 04:29:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-11-24 04:29:27,740 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 6 [2019-11-24 04:29:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:29:27,741 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-11-24 04:29:27,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:29:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-11-24 04:29:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:29:27,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:29:27,742 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:29:27,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:27,947 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:29:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:29:27,948 INFO L82 PathProgramCache]: Analyzing trace with hash 673048024, now seen corresponding path program 1 times [2019-11-24 04:29:27,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:29:27,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122271634] [2019-11-24 04:29:27,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:29:27,970 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:29:27,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140443365] [2019-11-24 04:29:27,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:28,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-24 04:29:28,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:29:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:28,042 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:29:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:28,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122271634] [2019-11-24 04:29:28,063 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:29:28,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140443365] [2019-11-24 04:29:28,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:29:28,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-24 04:29:28,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045458961] [2019-11-24 04:29:28,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:29:28,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:29:28,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:29:28,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:29:28,066 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 6 states. [2019-11-24 04:29:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:29:28,202 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2019-11-24 04:29:28,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:29:28,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-24 04:29:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:29:28,204 INFO L225 Difference]: With dead ends: 53 [2019-11-24 04:29:28,204 INFO L226 Difference]: Without dead ends: 51 [2019-11-24 04:29:28,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:29:28,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-24 04:29:28,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2019-11-24 04:29:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-24 04:29:28,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2019-11-24 04:29:28,214 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 8 [2019-11-24 04:29:28,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:29:28,214 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2019-11-24 04:29:28,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:29:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2019-11-24 04:29:28,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:29:28,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:29:28,215 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:29:28,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:28,426 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:29:28,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:29:28,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1740754341, now seen corresponding path program 1 times [2019-11-24 04:29:28,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:29:28,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331710531] [2019-11-24 04:29:28,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:29:28,439 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:29:28,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32143677] [2019-11-24 04:29:28,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:28,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-24 04:29:28,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:29:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:28,503 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:29:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:28,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331710531] [2019-11-24 04:29:28,542 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:29:28,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32143677] [2019-11-24 04:29:28,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:29:28,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-24 04:29:28,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503108789] [2019-11-24 04:29:28,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:29:28,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:29:28,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:29:28,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:29:28,545 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 6 states. [2019-11-24 04:29:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:29:28,676 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2019-11-24 04:29:28,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:29:28,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-24 04:29:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:29:28,677 INFO L225 Difference]: With dead ends: 55 [2019-11-24 04:29:28,678 INFO L226 Difference]: Without dead ends: 51 [2019-11-24 04:29:28,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:29:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-24 04:29:28,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2019-11-24 04:29:28,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-24 04:29:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-11-24 04:29:28,686 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 10 [2019-11-24 04:29:28,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:29:28,686 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-11-24 04:29:28,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:29:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-11-24 04:29:28,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:29:28,687 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:29:28,687 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:29:28,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:28,889 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:29:28,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:29:28,890 INFO L82 PathProgramCache]: Analyzing trace with hash -494183817, now seen corresponding path program 1 times [2019-11-24 04:29:28,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:29:28,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022212522] [2019-11-24 04:29:28,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:29:28,899 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:29:28,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302202716] [2019-11-24 04:29:28,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-24 04:29:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:28,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-24 04:29:28,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:29:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:28,957 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:29:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:28,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022212522] [2019-11-24 04:29:28,987 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:29:28,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302202716] [2019-11-24 04:29:28,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1784366614] [2019-11-24 04:29:29,013 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-24 04:29:29,014 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:29:29,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:29:29,028 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:29:29,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:29:30,129 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 231 [2019-11-24 04:29:30,330 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 232 [2019-11-24 04:29:30,572 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 288 [2019-11-24 04:29:30,934 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 286 [2019-11-24 04:29:31,226 WARN L192 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 341 [2019-11-24 04:29:31,579 WARN L192 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 340 [2019-11-24 04:29:31,998 WARN L192 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 422 [2019-11-24 04:29:32,508 WARN L192 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 418 [2019-11-24 04:29:32,984 WARN L192 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 419 [2019-11-24 04:29:33,576 WARN L192 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 420 [2019-11-24 04:29:34,206 WARN L192 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 508 [2019-11-24 04:29:34,710 WARN L192 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 509 [2019-11-24 04:29:35,606 WARN L192 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 624 [2019-11-24 04:29:36,593 WARN L192 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 623 [2019-11-24 04:29:37,706 WARN L192 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 743 DAG size of output: 741 [2019-11-24 04:29:39,123 WARN L192 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 738 DAG size of output: 738 [2019-11-24 04:29:40,750 WARN L192 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 906 DAG size of output: 903 [2019-11-24 04:29:42,908 WARN L192 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 899 DAG size of output: 889 [2019-11-24 04:29:45,422 WARN L192 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 1079 DAG size of output: 1074 [2019-11-24 04:29:48,109 WARN L192 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 1069 DAG size of output: 1069 [2019-11-24 04:29:51,874 WARN L192 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 1334 DAG size of output: 1331 [2019-11-24 04:29:56,613 WARN L192 SmtUtils]: Spent 3.73 s on a formula simplification. DAG size of input: 1328 DAG size of output: 1327 [2019-11-24 04:30:01,876 WARN L192 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 1583 DAG size of output: 1573 [2019-11-24 04:30:08,826 WARN L192 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 1569 DAG size of output: 1568 [2019-11-24 04:30:17,171 WARN L192 SmtUtils]: Spent 7.87 s on a formula simplification. DAG size of input: 1939 DAG size of output: 1926 [2019-11-24 04:30:28,620 WARN L192 SmtUtils]: Spent 7.93 s on a formula simplification. DAG size of input: 1918 DAG size of output: 1905 [2019-11-24 04:30:38,444 WARN L192 SmtUtils]: Spent 7.86 s on a formula simplification that was a NOOP. DAG size: 1895 [2019-11-24 04:30:46,352 WARN L192 SmtUtils]: Spent 7.90 s on a formula simplification. DAG size of input: 1896 DAG size of output: 1896 [2019-11-24 04:30:58,178 WARN L192 SmtUtils]: Spent 11.25 s on a formula simplification. DAG size of input: 2334 DAG size of output: 2326