/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:26:07,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:26:07,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:26:07,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:26:07,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:26:07,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:26:07,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:26:07,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:26:07,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:26:07,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:26:07,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:26:07,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:26:07,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:26:07,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:26:07,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:26:07,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:26:07,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:26:07,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:26:07,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:26:07,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:26:07,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:26:07,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:26:07,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:26:07,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:26:07,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:26:07,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:26:07,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:26:07,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:26:07,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:26:07,557 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:26:07,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:26:07,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:26:07,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:26:07,559 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:26:07,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:26:07,559 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:26:07,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:26:07,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:26:07,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:26:07,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:26:07,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:26:07,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:26:07,561 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:26:07,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:26:07,561 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:26:07,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:26:07,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:26:07,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:26:07,563 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:26:07,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:26:07,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:26:07,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:26:07,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:26:07,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:26:07,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:26:07,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:26:07,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:26:07,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:26:07,837 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:26:07,853 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:26:07,858 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:26:07,859 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:26:07,860 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:26:07,860 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2019-11-06 22:26:07,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0be3f8e8/bf4ec58f8d6745748b07c3622da691b5/FLAGd09dadb16 [2019-11-06 22:26:08,425 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:26:08,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2019-11-06 22:26:08,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0be3f8e8/bf4ec58f8d6745748b07c3622da691b5/FLAGd09dadb16 [2019-11-06 22:26:08,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0be3f8e8/bf4ec58f8d6745748b07c3622da691b5 [2019-11-06 22:26:08,790 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:26:08,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:26:08,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:26:08,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:26:08,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:26:08,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:08" (1/1) ... [2019-11-06 22:26:08,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4092cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08, skipping insertion in model container [2019-11-06 22:26:08,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:08" (1/1) ... [2019-11-06 22:26:08,808 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:26:08,834 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:26:09,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:26:09,128 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:26:09,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:26:09,278 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:26:09,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:09 WrapperNode [2019-11-06 22:26:09,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:26:09,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:26:09,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:26:09,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:26:09,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:09" (1/1) ... [2019-11-06 22:26:09,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:09" (1/1) ... [2019-11-06 22:26:09,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:09" (1/1) ... [2019-11-06 22:26:09,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:09" (1/1) ... [2019-11-06 22:26:09,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:09" (1/1) ... [2019-11-06 22:26:09,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:09" (1/1) ... [2019-11-06 22:26:09,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:09" (1/1) ... [2019-11-06 22:26:09,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:26:09,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:26:09,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:26:09,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:26:09,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:26:09,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:26:09,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:26:09,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 22:26:09,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:26:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:26:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 22:26:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 22:26:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-11-06 22:26:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 22:26:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:26:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 22:26:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:26:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:26:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:26:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:26:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:26:09,832 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:26:09,832 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-06 22:26:09,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:09 BoogieIcfgContainer [2019-11-06 22:26:09,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:26:09,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:26:09,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:26:09,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:26:09,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:26:08" (1/3) ... [2019-11-06 22:26:09,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133d6d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:09, skipping insertion in model container [2019-11-06 22:26:09,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:09" (2/3) ... [2019-11-06 22:26:09,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133d6d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:09, skipping insertion in model container [2019-11-06 22:26:09,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:09" (3/3) ... [2019-11-06 22:26:09,840 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2019-11-06 22:26:09,847 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:26:09,854 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:26:09,866 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:26:09,891 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:26:09,891 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:26:09,892 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:26:09,892 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:26:09,892 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:26:09,892 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:26:09,892 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:26:09,893 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:26:09,910 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-11-06 22:26:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 22:26:09,916 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:26:09,917 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:26:09,919 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:26:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:26:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash 299774862, now seen corresponding path program 1 times [2019-11-06 22:26:09,930 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:26:09,931 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191150156] [2019-11-06 22:26:09,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:26:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:26:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:26:10,067 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191150156] [2019-11-06 22:26:10,068 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:26:10,068 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 22:26:10,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821543006] [2019-11-06 22:26:10,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 22:26:10,076 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:26:10,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 22:26:10,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 22:26:10,092 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2019-11-06 22:26:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:26:10,122 INFO L93 Difference]: Finished difference Result 81 states and 117 transitions. [2019-11-06 22:26:10,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 22:26:10,123 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2019-11-06 22:26:10,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:26:10,131 INFO L225 Difference]: With dead ends: 81 [2019-11-06 22:26:10,131 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 22:26:10,134 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 [2019-11-06 22:26:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 22:26:10,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-06 22:26:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 22:26:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-11-06 22:26:10,177 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2019-11-06 22:26:10,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:26:10,178 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-11-06 22:26:10,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 22:26:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-11-06 22:26:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 22:26:10,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:26:10,180 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:26:10,180 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:26:10,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:26:10,181 INFO L82 PathProgramCache]: Analyzing trace with hash 268068598, now seen corresponding path program 1 times [2019-11-06 22:26:10,181 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:26:10,181 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775651935] [2019-11-06 22:26:10,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:26:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:26:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:26:10,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775651935] [2019-11-06 22:26:10,317 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:26:10,317 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:26:10,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516615755] [2019-11-06 22:26:10,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:26:10,320 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:26:10,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:26:10,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:26:10,321 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2019-11-06 22:26:10,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:26:10,417 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2019-11-06 22:26:10,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:26:10,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-11-06 22:26:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:26:10,419 INFO L225 Difference]: With dead ends: 58 [2019-11-06 22:26:10,419 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 22:26:10,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:26:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 22:26:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-06 22:26:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 22:26:10,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2019-11-06 22:26:10,435 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 28 [2019-11-06 22:26:10,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:26:10,435 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2019-11-06 22:26:10,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:26:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2019-11-06 22:26:10,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 22:26:10,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:26:10,437 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:26:10,438 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:26:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:26:10,438 INFO L82 PathProgramCache]: Analyzing trace with hash 962591476, now seen corresponding path program 1 times [2019-11-06 22:26:10,439 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:26:10,439 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919079153] [2019-11-06 22:26:10,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:26:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:26:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 22:26:10,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919079153] [2019-11-06 22:26:10,521 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:26:10,521 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:26:10,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398918839] [2019-11-06 22:26:10,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:26:10,522 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:26:10,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:26:10,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:26:10,523 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 3 states. [2019-11-06 22:26:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:26:10,655 INFO L93 Difference]: Finished difference Result 99 states and 129 transitions. [2019-11-06 22:26:10,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:26:10,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2019-11-06 22:26:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:26:10,657 INFO L225 Difference]: With dead ends: 99 [2019-11-06 22:26:10,658 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 22:26:10,659 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:26:10,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 22:26:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-11-06 22:26:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 22:26:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-11-06 22:26:10,669 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 30 [2019-11-06 22:26:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:26:10,670 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-11-06 22:26:10,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:26:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-11-06 22:26:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:26:10,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:26:10,672 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:26:10,672 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:26:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:26:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1516091022, now seen corresponding path program 1 times [2019-11-06 22:26:10,673 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:26:10,673 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894158213] [2019-11-06 22:26:10,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:26:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:26:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 22:26:10,762 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894158213] [2019-11-06 22:26:10,763 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:26:10,763 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:26:10,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982461958] [2019-11-06 22:26:10,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:26:10,764 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:26:10,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:26:10,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:26:10,766 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 4 states. [2019-11-06 22:26:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:26:10,926 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2019-11-06 22:26:10,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:26:10,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-06 22:26:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:26:10,928 INFO L225 Difference]: With dead ends: 95 [2019-11-06 22:26:10,929 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 22:26:10,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:26:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 22:26:10,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-11-06 22:26:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 22:26:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-11-06 22:26:10,938 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2019-11-06 22:26:10,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:26:10,940 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-11-06 22:26:10,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:26:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-11-06 22:26:10,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:26:10,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:26:10,942 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:26:10,943 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:26:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:26:10,943 INFO L82 PathProgramCache]: Analyzing trace with hash 94574052, now seen corresponding path program 1 times [2019-11-06 22:26:10,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:26:10,944 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500262493] [2019-11-06 22:26:10,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:26:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:26:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:26:11,013 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500262493] [2019-11-06 22:26:11,013 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306791294] [2019-11-06 22:26:11,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:26:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:26:11,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:26:11,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:26:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:26:11,132 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:26:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:26:11,166 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [587064833] [2019-11-06 22:26:11,172 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 47 [2019-11-06 22:26:11,222 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:26:11,222 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:26:11,289 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:26:11,291 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 24 root evaluator evaluations with a maximum evaluation depth of 3. Performed 24 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 40 variables. [2019-11-06 22:26:11,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:26:11,295 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-11-06 22:26:11,341 INFO L227 lantSequenceWeakener]: Weakened 5 states. On average, predicates are now at 77.5% of their original sizes. [2019-11-06 22:26:11,341 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-11-06 22:26:11,352 INFO L553 sIntCurrentIteration]: We unified 45 AI predicates to 45 [2019-11-06 22:26:11,352 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-11-06 22:26:11,353 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-06 22:26:11,353 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4] total 9 [2019-11-06 22:26:11,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286335333] [2019-11-06 22:26:11,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:26:11,354 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:26:11,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:26:11,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:26:11,355 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 4 states. [2019-11-06 22:26:11,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 22:26:11,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:26:11,563 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: at least one of both input predicates is unknown: 807#true or 1140#(= ~MAX~0 100000) ([#1{~MAX~0 = [100000;100000]; }]) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$CoverageRelation.isCovered(PredicateUnifier.java:593) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.SdHoareTripleChecker$CheckHelper.check(SdHoareTripleChecker.java:153) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.SdHoareTripleChecker.checkCall(SdHoareTripleChecker.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.checkCall(EfficientHoareTripleChecker.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.checkCall(CachingHoareTripleChecker.java:125) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$CallSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:403) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.callSuccessors(AbstractInterpolantAutomaton.java:257) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.callSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.callSuccessors(TotalizeNwa.java:260) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.callSuccessors(ComplementDeterministicNwa.java:131) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.callSuccessors(ProductNwa.java:252) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.callSuccessors(ProductNwa.java:244) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addCallsAndSuccessors(NestedWordAutomatonReachableStates.java:1089) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:969) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-06 22:26:11,569 INFO L168 Benchmark]: Toolchain (without parser) took 2776.31 ms. Allocated memory was 144.2 MB in the beginning and 234.4 MB in the end (delta: 90.2 MB). Free memory was 102.2 MB in the beginning and 160.7 MB in the end (delta: -58.6 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB. [2019-11-06 22:26:11,570 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-06 22:26:11,571 INFO L168 Benchmark]: CACSL2BoogieTranslator took 486.41 ms. Allocated memory was 144.2 MB in the beginning and 202.9 MB in the end (delta: 58.7 MB). Free memory was 101.9 MB in the beginning and 181.0 MB in the end (delta: -79.0 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2019-11-06 22:26:11,572 INFO L168 Benchmark]: Boogie Preprocessor took 80.88 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 178.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-11-06 22:26:11,573 INFO L168 Benchmark]: RCFGBuilder took 473.11 ms. Allocated memory is still 202.9 MB. Free memory was 178.6 MB in the beginning and 158.2 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2019-11-06 22:26:11,574 INFO L168 Benchmark]: TraceAbstraction took 1731.71 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 158.2 MB in the beginning and 160.7 MB in the end (delta: -2.5 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2019-11-06 22:26:11,578 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 486.41 ms. Allocated memory was 144.2 MB in the beginning and 202.9 MB in the end (delta: 58.7 MB). Free memory was 101.9 MB in the beginning and 181.0 MB in the end (delta: -79.0 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 80.88 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 178.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 473.11 ms. Allocated memory is still 202.9 MB. Free memory was 178.6 MB in the beginning and 158.2 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1731.71 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 158.2 MB in the beginning and 160.7 MB in the end (delta: -2.5 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: at least one of both input predicates is unknown: 807#true or 1140#(= ~MAX~0 100000) ([#1{~MAX~0 = [100000;100000]; }]) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: at least one of both input predicates is unknown: 807#true or 1140#(= ~MAX~0 100000) ([#1{~MAX~0 = [100000;100000]; }]): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$CoverageRelation.isCovered(PredicateUnifier.java:593) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...