/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:08:48,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:08:48,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:08:48,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:08:48,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:08:48,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:08:48,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:08:48,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:08:48,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:08:48,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:08:48,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:08:48,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-23 22:08:48,627 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 [2019-11-23 22:08:48,646 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:08:48,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:08:48,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:08:48,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:08:48,649 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:08:48,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:08:48,649 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:08:48,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:08:48,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:08:48,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:08:48,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:08:48,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:08:48,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:08:48,652 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:08:48,652 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:08:48,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:08:48,653 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:08:48,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:08:48,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:08:48,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:08:48,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:08:48,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:08:48,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:08:48,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:08:48,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:08:48,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:08:48,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:08:48,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:08:48,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:08:48,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:08:48,927 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:08:48,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:08:48,942 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:08:48,944 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:08:48,944 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:08:48,945 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2019-11-23 22:08:49,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fcdb69b9/de65cd128d764781ba5ac8013791116f/FLAGc3e2a446e [2019-11-23 22:08:49,466 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:08:49,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2019-11-23 22:08:49,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fcdb69b9/de65cd128d764781ba5ac8013791116f/FLAGc3e2a446e [2019-11-23 22:08:49,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fcdb69b9/de65cd128d764781ba5ac8013791116f [2019-11-23 22:08:49,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:08:49,866 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:08:49,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:08:49,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:08:49,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:08:49,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:08:49" (1/1) ... [2019-11-23 22:08:49,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2041315a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:49, skipping insertion in model container [2019-11-23 22:08:49,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:08:49" (1/1) ... [2019-11-23 22:08:49,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:08:49,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:08:50,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:08:50,065 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:08:50,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:08:50,089 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:08:50,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:50 WrapperNode [2019-11-23 22:08:50,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:08:50,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:08:50,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:08:50,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:08:50,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:50" (1/1) ... [2019-11-23 22:08:50,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:50" (1/1) ... [2019-11-23 22:08:50,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:08:50,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:08:50,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:08:50,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:08:50,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:50" (1/1) ... [2019-11-23 22:08:50,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:50" (1/1) ... [2019-11-23 22:08:50,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:50" (1/1) ... [2019-11-23 22:08:50,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:50" (1/1) ... [2019-11-23 22:08:50,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:50" (1/1) ... [2019-11-23 22:08:50,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:50" (1/1) ... [2019-11-23 22:08:50,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:50" (1/1) ... [2019-11-23 22:08:50,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:08:50,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:08:50,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:08:50,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:08:50,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:50" (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 [2019-11-23 22:08:50,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:08:50,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:08:50,449 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:08:50,449 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:08:50,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:08:50 BoogieIcfgContainer [2019-11-23 22:08:50,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:08:50,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:08:50,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:08:50,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:08:50,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:08:49" (1/3) ... [2019-11-23 22:08:50,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b583d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:08:50, skipping insertion in model container [2019-11-23 22:08:50,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:50" (2/3) ... [2019-11-23 22:08:50,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b583d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:08:50, skipping insertion in model container [2019-11-23 22:08:50,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:08:50" (3/3) ... [2019-11-23 22:08:50,459 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2019-11-23 22:08:50,470 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:08:50,476 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:08:50,488 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:08:50,516 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:08:50,516 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:08:50,516 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:08:50,517 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:08:50,517 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:08:50,517 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:08:50,517 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:08:50,517 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:08:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 22:08:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 22:08:50,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:50,539 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 22:08:50,539 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:50,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:50,545 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-11-23 22:08:50,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:50,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106987516] [2019-11-23 22:08:50,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:50,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106987516] [2019-11-23 22:08:50,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:08:50,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:08:50,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677412399] [2019-11-23 22:08:50,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:08:50,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:50,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:08:50,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:08:50,777 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2019-11-23 22:08:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:50,824 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-11-23 22:08:50,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:08:50,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-23 22:08:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:50,836 INFO L225 Difference]: With dead ends: 17 [2019-11-23 22:08:50,836 INFO L226 Difference]: Without dead ends: 7 [2019-11-23 22:08:50,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:08:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-23 22:08:50,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-23 22:08:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-23 22:08:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-23 22:08:50,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-23 22:08:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:50,894 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-23 22:08:50,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:08:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-23 22:08:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:08:50,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:50,895 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 22:08:50,896 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:50,896 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-11-23 22:08:50,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:50,897 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067771377] [2019-11-23 22:08:50,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:51,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067771377] [2019-11-23 22:08:51,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670714441] [2019-11-23 22:08:51,070 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 [2019-11-23 22:08:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:51,103 WARN L253 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:08:51,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:51,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:51,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2019-11-23 22:08:51,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884673429] [2019-11-23 22:08:51,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:08:51,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:51,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:08:51,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:08:51,148 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-11-23 22:08:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:51,200 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-11-23 22:08:51,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:08:51,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-11-23 22:08:51,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:51,203 INFO L225 Difference]: With dead ends: 12 [2019-11-23 22:08:51,203 INFO L226 Difference]: Without dead ends: 8 [2019-11-23 22:08:51,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:08:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-23 22:08:51,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-23 22:08:51,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-23 22:08:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-23 22:08:51,210 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-23 22:08:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:51,211 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-23 22:08:51,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:08:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-23 22:08:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:08:51,212 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:51,212 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-23 22:08:51,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:51,414 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:51,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:51,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2019-11-23 22:08:51,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:51,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64748466] [2019-11-23 22:08:51,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:51,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64748466] [2019-11-23 22:08:51,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749130784] [2019-11-23 22:08:51,538 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 [2019-11-23 22:08:51,567 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:08:51,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:51,569 WARN L253 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:08:51,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:51,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:51,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-23 22:08:51,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419711092] [2019-11-23 22:08:51,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:08:51,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:51,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:08:51,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:08:51,606 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2019-11-23 22:08:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:51,647 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-11-23 22:08:51,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:08:51,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2019-11-23 22:08:51,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:51,649 INFO L225 Difference]: With dead ends: 13 [2019-11-23 22:08:51,650 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 22:08:51,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:08:51,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 22:08:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 22:08:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 22:08:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-23 22:08:51,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-11-23 22:08:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:51,656 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-23 22:08:51,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:08:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-23 22:08:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:08:51,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:51,657 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-11-23 22:08:51,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:51,859 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:51,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:51,859 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2019-11-23 22:08:51,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:51,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999517551] [2019-11-23 22:08:51,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:51,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999517551] [2019-11-23 22:08:51,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978738475] [2019-11-23 22:08:51,986 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 [2019-11-23 22:08:52,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:08:52,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:52,014 WARN L253 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:08:52,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:52,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:52,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-23 22:08:52,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479252311] [2019-11-23 22:08:52,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:08:52,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:52,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:08:52,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:08:52,045 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2019-11-23 22:08:52,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:52,110 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-23 22:08:52,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:08:52,111 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-11-23 22:08:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:52,112 INFO L225 Difference]: With dead ends: 14 [2019-11-23 22:08:52,112 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:08:52,112 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:08:52,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:08:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:08:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:08:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-11-23 22:08:52,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2019-11-23 22:08:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:52,116 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-11-23 22:08:52,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:08:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-11-23 22:08:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:08:52,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:52,117 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2019-11-23 22:08:52,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:52,325 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:52,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1174852536, now seen corresponding path program 4 times [2019-11-23 22:08:52,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:52,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259855398] [2019-11-23 22:08:52,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:52,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259855398] [2019-11-23 22:08:52,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561579043] [2019-11-23 22:08:52,489 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 [2019-11-23 22:08:52,527 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:08:52,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:52,528 WARN L253 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:08:52,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:52,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:52,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-23 22:08:52,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569592756] [2019-11-23 22:08:52,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:08:52,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:52,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:08:52,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:08:52,561 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2019-11-23 22:08:52,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:52,619 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-23 22:08:52,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:08:52,620 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2019-11-23 22:08:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:52,621 INFO L225 Difference]: With dead ends: 15 [2019-11-23 22:08:52,621 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:08:52,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:08:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:08:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 22:08:52,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:08:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-23 22:08:52,627 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2019-11-23 22:08:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:52,628 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-23 22:08:52,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:08:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-23 22:08:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:08:52,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:52,628 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2019-11-23 22:08:52,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:52,832 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:52,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2059024878, now seen corresponding path program 5 times [2019-11-23 22:08:52,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:52,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838093027] [2019-11-23 22:08:52,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:52,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838093027] [2019-11-23 22:08:52,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479369796] [2019-11-23 22:08:52,962 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 [2019-11-23 22:08:52,993 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 22:08:52,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:52,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:08:52,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:53,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:53,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-23 22:08:53,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909512394] [2019-11-23 22:08:53,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:08:53,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:53,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:08:53,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:08:53,018 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2019-11-23 22:08:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:53,082 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-23 22:08:53,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:08:53,082 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-11-23 22:08:53,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:53,083 INFO L225 Difference]: With dead ends: 16 [2019-11-23 22:08:53,083 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:08:53,084 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:08:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:08:53,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 22:08:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:08:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-23 22:08:53,091 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-23 22:08:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:53,092 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-23 22:08:53,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:08:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-23 22:08:53,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:08:53,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:53,092 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2019-11-23 22:08:53,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:53,300 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:53,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:53,300 INFO L82 PathProgramCache]: Analyzing trace with hash 596403592, now seen corresponding path program 6 times [2019-11-23 22:08:53,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:53,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073127412] [2019-11-23 22:08:53,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 22:08:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 22:08:53,355 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-23 22:08:53,355 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-23 22:08:53,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 10:08:53 BoogieIcfgContainer [2019-11-23 22:08:53,380 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-23 22:08:53,390 INFO L168 Benchmark]: Toolchain (without parser) took 3515.55 ms. Allocated memory was 140.0 MB in the beginning and 232.8 MB in the end (delta: 92.8 MB). Free memory was 103.9 MB in the beginning and 143.6 MB in the end (delta: -39.7 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. [2019-11-23 22:08:53,391 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory is still 121.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-11-23 22:08:53,393 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.79 ms. Allocated memory is still 140.0 MB. Free memory was 103.4 MB in the beginning and 94.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-11-23 22:08:53,394 INFO L168 Benchmark]: Boogie Procedure Inliner took 109.66 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 94.2 MB in the beginning and 182.9 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2019-11-23 22:08:53,395 INFO L168 Benchmark]: Boogie Preprocessor took 22.71 ms. Allocated memory is still 203.9 MB. Free memory was 182.9 MB in the beginning and 182.0 MB in the end (delta: 922.8 kB). Peak memory consumption was 922.8 kB. Max. memory is 7.1 GB. [2019-11-23 22:08:53,398 INFO L168 Benchmark]: RCFGBuilder took 227.09 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 171.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-11-23 22:08:53,399 INFO L168 Benchmark]: TraceAbstraction took 2928.73 ms. Allocated memory was 203.9 MB in the beginning and 232.8 MB in the end (delta: 28.8 MB). Free memory was 171.8 MB in the beginning and 143.6 MB in the end (delta: 28.2 MB). Peak memory consumption was 57.1 MB. Max. memory is 7.1 GB. [2019-11-23 22:08:53,412 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory is still 121.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 222.79 ms. Allocated memory is still 140.0 MB. Free memory was 103.4 MB in the beginning and 94.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 109.66 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 94.2 MB in the beginning and 182.9 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.71 ms. Allocated memory is still 203.9 MB. Free memory was 182.9 MB in the beginning and 182.0 MB in the end (delta: 922.8 kB). Peak memory consumption was 922.8 kB. Max. memory is 7.1 GB. * RCFGBuilder took 227.09 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 171.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2928.73 ms. Allocated memory was 203.9 MB in the beginning and 232.8 MB in the end (delta: 28.8 MB). Free memory was 171.8 MB in the beginning and 143.6 MB in the end (delta: 28.2 MB). Peak memory consumption was 57.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.8s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 2 SDslu, 55 SDs, 0 SdLazy, 175 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 16 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 2607 SizeOfPredicates, 0 NumberOfNonLiveVariables, 145 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...