/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/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:14:01,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:14:01,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:14:01,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:14:01,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:14:01,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:14:01,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:14:01,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:14:01,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:14:01,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:14:01,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:14:01,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:14:01,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:14:01,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:14:01,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:14:01,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:14:01,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:14:01,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:14:01,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:14:01,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:14:01,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:14:01,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:14:01,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:14:01,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:14:01,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:14:01,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:14:01,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:14:01,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:14:01,376 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 22:14:01,390 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:14:01,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:14:01,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:14:01,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:14:01,392 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:14:01,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:14:01,392 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:14:01,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:14:01,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:14:01,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:14:01,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:14:01,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:14:01,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:14:01,394 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:14:01,394 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:14:01,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:14:01,394 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:14:01,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:14:01,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:14:01,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:14:01,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:14:01,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:14:01,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:14:01,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:14:01,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:14:01,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:14:01,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:14:01,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:14:01,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:14:01,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:14:01,679 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:14:01,694 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:14:01,698 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:14:01,699 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:14:01,700 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:14:01,700 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2019-11-23 22:14:01,763 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bea4f1690/50880969426f41819f19312ad65988c3/FLAGcf195d92b [2019-11-23 22:14:02,208 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:14:02,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c [2019-11-23 22:14:02,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bea4f1690/50880969426f41819f19312ad65988c3/FLAGcf195d92b [2019-11-23 22:14:02,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bea4f1690/50880969426f41819f19312ad65988c3 [2019-11-23 22:14:02,608 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:14:02,610 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:14:02,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:14:02,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:14:02,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:14:02,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:14:02" (1/1) ... [2019-11-23 22:14:02,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@af48675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02, skipping insertion in model container [2019-11-23 22:14:02,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:14:02" (1/1) ... [2019-11-23 22:14:02,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:14:02,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:14:02,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:14:02,856 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:14:02,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:14:02,889 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:14:02,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02 WrapperNode [2019-11-23 22:14:02,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:14:02,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:14:02,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:14:02,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:14:02,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02" (1/1) ... [2019-11-23 22:14:02,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02" (1/1) ... [2019-11-23 22:14:03,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:14:03,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:14:03,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:14:03,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:14:03,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02" (1/1) ... [2019-11-23 22:14:03,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02" (1/1) ... [2019-11-23 22:14:03,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02" (1/1) ... [2019-11-23 22:14:03,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02" (1/1) ... [2019-11-23 22:14:03,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02" (1/1) ... [2019-11-23 22:14:03,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02" (1/1) ... [2019-11-23 22:14:03,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02" (1/1) ... [2019-11-23 22:14:03,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:14:03,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:14:03,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:14:03,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:14:03,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02" (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 22:14:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:14:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 22:14:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:14:03,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:14:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:14:03,348 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:14:03,349 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 22:14:03,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:14:03 BoogieIcfgContainer [2019-11-23 22:14:03,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:14:03,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:14:03,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:14:03,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:14:03,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:14:02" (1/3) ... [2019-11-23 22:14:03,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d71b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:14:03, skipping insertion in model container [2019-11-23 22:14:03,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:02" (2/3) ... [2019-11-23 22:14:03,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d71b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:14:03, skipping insertion in model container [2019-11-23 22:14:03,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:14:03" (3/3) ... [2019-11-23 22:14:03,358 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_search.c [2019-11-23 22:14:03,368 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:14:03,376 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:14:03,389 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:14:03,425 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:14:03,426 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:14:03,426 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:14:03,426 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:14:03,426 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:14:03,427 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:14:03,427 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:14:03,427 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:14:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 22:14:03,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:14:03,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:03,457 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:03,457 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:03,464 INFO L82 PathProgramCache]: Analyzing trace with hash 138500705, now seen corresponding path program 1 times [2019-11-23 22:14:03,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:03,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809993594] [2019-11-23 22:14:03,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:03,674 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 22:14:03,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809993594] [2019-11-23 22:14:03,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:14:03,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:14:03,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996219790] [2019-11-23 22:14:03,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:14:03,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:03,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:14:03,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:14:03,703 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2019-11-23 22:14:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:03,724 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2019-11-23 22:14:03,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:14:03,726 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 22:14:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:03,738 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:14:03,738 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:14:03,742 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 [2019-11-23 22:14:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:14:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 22:14:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:14:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-23 22:14:03,782 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2019-11-23 22:14:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:03,782 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-23 22:14:03,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:14:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-23 22:14:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:14:03,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:03,784 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:03,784 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:03,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:03,785 INFO L82 PathProgramCache]: Analyzing trace with hash -316927884, now seen corresponding path program 1 times [2019-11-23 22:14:03,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:03,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824825899] [2019-11-23 22:14:03,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:03,946 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 22:14:03,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824825899] [2019-11-23 22:14:03,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:14:03,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:14:03,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895991419] [2019-11-23 22:14:03,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:14:03,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:03,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:14:03,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:14:03,955 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 4 states. [2019-11-23 22:14:04,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:04,008 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2019-11-23 22:14:04,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:14:04,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-23 22:14:04,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:04,010 INFO L225 Difference]: With dead ends: 16 [2019-11-23 22:14:04,010 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:14:04,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:14:04,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:14:04,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 22:14:04,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:14:04,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 22:14:04,015 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2019-11-23 22:14:04,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:04,015 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 22:14:04,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:14:04,016 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 22:14:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:14:04,016 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:04,016 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:04,017 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:04,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:04,017 INFO L82 PathProgramCache]: Analyzing trace with hash -316868302, now seen corresponding path program 1 times [2019-11-23 22:14:04,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:04,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779905991] [2019-11-23 22:14:04,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:04,207 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 22:14:04,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779905991] [2019-11-23 22:14:04,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:14:04,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:14:04,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291687625] [2019-11-23 22:14:04,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:14:04,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:04,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:14:04,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:14:04,210 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2019-11-23 22:14:04,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:04,265 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2019-11-23 22:14:04,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:14:04,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-23 22:14:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:04,266 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:14:04,266 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:14:04,267 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:14:04,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:14:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-23 22:14:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:14:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-23 22:14:04,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2019-11-23 22:14:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:04,273 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-23 22:14:04,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:14:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-23 22:14:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:14:04,274 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:04,274 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:04,274 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:04,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1526315956, now seen corresponding path program 1 times [2019-11-23 22:14:04,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:04,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986609591] [2019-11-23 22:14:04,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:04,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986609591] [2019-11-23 22:14:04,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:14:04,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:14:04,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603974083] [2019-11-23 22:14:04,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:14:04,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:04,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:14:04,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:14:04,405 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 4 states. [2019-11-23 22:14:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:04,453 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-23 22:14:04,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:14:04,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 22:14:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:04,455 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:14:04,456 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:14:04,456 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 [2019-11-23 22:14:04,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:14:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2019-11-23 22:14:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:14:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-23 22:14:04,463 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 14 [2019-11-23 22:14:04,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:04,464 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-23 22:14:04,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:14:04,464 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-23 22:14:04,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:14:04,466 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:04,466 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:04,466 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:04,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:04,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1959304714, now seen corresponding path program 1 times [2019-11-23 22:14:04,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:04,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508935706] [2019-11-23 22:14:04,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:04,651 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 22:14:04,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508935706] [2019-11-23 22:14:04,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418370661] [2019-11-23 22:14:04,652 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 22:14:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:04,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:14:04,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:04,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:04,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:04,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:14:04,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:04,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-11-23 22:14:04,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462313672] [2019-11-23 22:14:04,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:14:04,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:04,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:14:04,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:14:04,923 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 7 states. [2019-11-23 22:14:05,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:05,290 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-11-23 22:14:05,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:14:05,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-23 22:14:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:05,292 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:14:05,292 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:14:05,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:14:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:14:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 22:14:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:14:05,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-23 22:14:05,302 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2019-11-23 22:14:05,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:05,302 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-23 22:14:05,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:14:05,303 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-23 22:14:05,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:14:05,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:05,305 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:05,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:05,512 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:05,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:05,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1972203106, now seen corresponding path program 1 times [2019-11-23 22:14:05,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:05,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364345592] [2019-11-23 22:14:05,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:05,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364345592] [2019-11-23 22:14:05,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718725633] [2019-11-23 22:14:05,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:05,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:14:05,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:05,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:05,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:14:05,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837639684] [2019-11-23 22:14:05,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:14:05,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:05,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:14:05,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:14:05,709 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2019-11-23 22:14:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:05,796 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-11-23 22:14:05,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:14:05,797 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-23 22:14:05,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:05,804 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:14:05,804 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:14:05,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:14:05,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:14:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2019-11-23 22:14:05,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:14:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 22:14:05,814 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-11-23 22:14:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:05,814 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 22:14:05,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:14:05,814 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 22:14:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:14:05,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:05,817 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:06,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:06,018 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1162856480, now seen corresponding path program 1 times [2019-11-23 22:14:06,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:06,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456916709] [2019-11-23 22:14:06,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:06,546 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 38 [2019-11-23 22:14:08,973 WARN L192 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 176 DAG size of output: 56 [2019-11-23 22:14:09,480 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 82 [2019-11-23 22:14:09,685 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 36 [2019-11-23 22:14:11,843 WARN L192 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 88 DAG size of output: 29 [2019-11-23 22:14:14,185 WARN L192 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 77 DAG size of output: 19 [2019-11-23 22:14:14,192 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 22:14:14,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456916709] [2019-11-23 22:14:14,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981191354] [2019-11-23 22:14:14,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:14,265 WARN L253 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 22:14:14,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:14,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:22,381 WARN L192 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 29 DAG size of output: 13 [2019-11-23 22:14:22,435 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:22,435 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:22,443 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:22,443 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:22,525 INFO L567 ElimStorePlain]: treesize reduction 215, result has 15.0 percent of original size [2019-11-23 22:14:22,540 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2019-11-23 22:14:22,540 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:22,568 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:22,568 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-11-23 22:14:22,568 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-11-23 22:14:22,569 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:14:22,569 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:374, output treesize:34 [2019-11-23 22:14:24,781 WARN L192 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 38 [2019-11-23 22:14:25,081 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2019-11-23 22:14:26,383 WARN L192 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2019-11-23 22:14:26,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:26,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:26,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:26,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:26,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:26,432 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:26,474 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:26,475 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 79 [2019-11-23 22:14:26,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:26,477 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:26,487 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:26,487 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:26,504 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:26,533 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:26,534 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 79 [2019-11-23 22:14:26,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:26,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:26,536 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:26,542 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:26,542 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:26,549 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:26,551 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:26,553 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:26,560 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:26,581 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:26,581 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 78 [2019-11-23 22:14:26,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:26,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:26,585 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:26,738 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-23 22:14:26,739 INFO L567 ElimStorePlain]: treesize reduction 66, result has 59.0 percent of original size [2019-11-23 22:14:26,740 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-23 22:14:26,740 INFO L221 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:361, output treesize:95 [2019-11-23 22:14:27,762 WARN L192 SmtUtils]: Spent 936.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-11-23 22:14:28,265 WARN L192 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-23 22:14:28,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:31,110 WARN L192 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2019-11-23 22:14:31,125 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 22:14:31,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:31,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2019-11-23 22:14:31,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116038711] [2019-11-23 22:14:31,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:14:31,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:31,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:14:31,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=232, Unknown=3, NotChecked=0, Total=306 [2019-11-23 22:14:31,128 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 18 states. [2019-11-23 22:14:33,057 WARN L192 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2019-11-23 22:14:35,024 WARN L192 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2019-11-23 22:14:35,336 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 56 [2019-11-23 22:14:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:35,555 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-11-23 22:14:35,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:14:35,556 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2019-11-23 22:14:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:35,557 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:14:35,557 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:14:35,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=125, Invalid=378, Unknown=3, NotChecked=0, Total=506 [2019-11-23 22:14:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:14:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 22:14:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:14:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-11-23 22:14:35,564 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 18 [2019-11-23 22:14:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:35,564 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-11-23 22:14:35,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:14:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-11-23 22:14:35,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:14:35,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:35,565 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:35,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:35,774 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:35,775 INFO L82 PathProgramCache]: Analyzing trace with hash 319994682, now seen corresponding path program 2 times [2019-11-23 22:14:35,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:35,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132224376] [2019-11-23 22:14:35,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:35,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132224376] [2019-11-23 22:14:35,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558744818] [2019-11-23 22:14:35,870 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 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 22:14:35,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:14:35,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:35,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:14:35,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:35,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:35,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 22:14:35,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177104159] [2019-11-23 22:14:35,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:14:35,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:35,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:14:35,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:14:35,976 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 7 states. [2019-11-23 22:14:36,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:36,049 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-11-23 22:14:36,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:14:36,050 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-11-23 22:14:36,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:36,051 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:14:36,051 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:14:36,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:14:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:14:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 22:14:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:14:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 22:14:36,056 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 22 [2019-11-23 22:14:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:36,057 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 22:14:36,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:14:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 22:14:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:14:36,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:36,058 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:36,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:36,267 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:36,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1594500078, now seen corresponding path program 3 times [2019-11-23 22:14:36,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:36,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17124535] [2019-11-23 22:14:36,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:36,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17124535] [2019-11-23 22:14:36,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782912764] [2019-11-23 22:14:36,350 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 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 22:14:36,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 22:14:36,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:36,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:14:36,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:36,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:36,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 22:14:36,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483381300] [2019-11-23 22:14:36,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:14:36,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:36,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:14:36,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:14:36,473 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2019-11-23 22:14:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:36,601 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2019-11-23 22:14:36,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:14:36,601 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-23 22:14:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:36,602 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:14:36,602 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:14:36,603 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:14:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:14:36,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2019-11-23 22:14:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:14:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-23 22:14:36,607 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 26 [2019-11-23 22:14:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:36,608 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-23 22:14:36,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:14:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-23 22:14:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:14:36,609 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:36,609 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:36,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:36,812 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:36,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1891120592, now seen corresponding path program 2 times [2019-11-23 22:14:36,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:36,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845851061] [2019-11-23 22:14:36,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:37,141 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 46 [2019-11-23 22:14:39,385 WARN L192 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 176 DAG size of output: 57 [2019-11-23 22:14:41,879 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 64 [2019-11-23 22:14:42,263 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 59 [2019-11-23 22:14:42,472 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 38 [2019-11-23 22:14:42,755 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 33 [2019-11-23 22:14:42,944 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 17 [2019-11-23 22:14:45,163 WARN L192 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 125 DAG size of output: 31 [2019-11-23 22:14:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:45,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845851061] [2019-11-23 22:14:45,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777277493] [2019-11-23 22:14:45,500 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:45,597 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:14:45,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:45,599 WARN L253 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-23 22:14:45,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:45,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:45,701 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:45,701 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:45,709 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:45,709 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:45,715 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:45,716 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:45,723 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:45,723 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:45,827 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 34 [2019-11-23 22:14:45,827 INFO L567 ElimStorePlain]: treesize reduction 580, result has 7.5 percent of original size [2019-11-23 22:14:45,832 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-11-23 22:14:45,832 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:45,854 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:45,854 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_5| vanished before elimination [2019-11-23 22:14:45,855 INFO L464 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2019-11-23 22:14:45,855 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:14:45,856 INFO L221 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:927, output treesize:43 [2019-11-23 22:14:47,055 WARN L192 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2019-11-23 22:14:47,736 WARN L192 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-11-23 22:14:48,600 WARN L192 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2019-11-23 22:14:48,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:48,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:48,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:48,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:48,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:48,625 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:48,626 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:48,645 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:48,646 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 71 [2019-11-23 22:14:48,647 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:48,656 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:48,658 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:48,660 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:48,662 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:48,665 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:48,688 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:48,689 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 70 [2019-11-23 22:14:48,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:48,691 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:48,695 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:48,696 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:48,711 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:48,712 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:48,713 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 22:14:48,717 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 22:14:48,718 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 1 [2019-11-23 22:14:48,718 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:48,722 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:48,722 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:48,875 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2019-11-23 22:14:48,877 INFO L567 ElimStorePlain]: treesize reduction 6, result has 93.3 percent of original size [2019-11-23 22:14:48,878 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2019-11-23 22:14:48,879 INFO L221 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:441, output treesize:83 [2019-11-23 22:14:49,219 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-11-23 22:14:51,358 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 31 [2019-11-23 22:14:51,688 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2019-11-23 22:14:56,076 WARN L192 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2019-11-23 22:14:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:56,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:56,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2019-11-23 22:14:56,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020392888] [2019-11-23 22:14:56,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:14:56,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:56,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:14:56,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=559, Unknown=1, NotChecked=0, Total=650 [2019-11-23 22:14:56,085 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-11-23 22:14:57,606 WARN L192 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2019-11-23 22:14:57,819 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2019-11-23 22:14:58,580 WARN L192 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2019-11-23 22:14:59,426 WARN L192 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 53 [2019-11-23 22:14:59,925 WARN L192 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 61 [2019-11-23 22:15:02,737 WARN L192 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2019-11-23 22:15:03,079 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2019-11-23 22:15:04,515 WARN L192 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2019-11-23 22:15:05,446 WARN L192 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2019-11-23 22:15:05,836 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2019-11-23 22:15:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:06,358 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2019-11-23 22:15:06,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:15:06,361 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2019-11-23 22:15:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:06,361 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:15:06,362 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 22:15:06,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=274, Invalid=1447, Unknown=1, NotChecked=0, Total=1722 [2019-11-23 22:15:06,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 22:15:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-11-23 22:15:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:15:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-11-23 22:15:06,369 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 26 [2019-11-23 22:15:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:06,370 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-11-23 22:15:06,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:15:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-11-23 22:15:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:15:06,371 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:06,371 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:06,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:06,574 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1412223210, now seen corresponding path program 4 times [2019-11-23 22:15:06,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:06,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970241865] [2019-11-23 22:15:06,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:06,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970241865] [2019-11-23 22:15:06,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302097438] [2019-11-23 22:15:06,666 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:06,717 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:15:06,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:06,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:15:06,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:06,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:06,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 22:15:06,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391969464] [2019-11-23 22:15:06,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:15:06,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:06,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:15:06,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:15:06,743 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 9 states. [2019-11-23 22:15:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:06,909 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-11-23 22:15:06,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:15:06,910 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2019-11-23 22:15:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:06,911 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:15:06,911 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:15:06,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:15:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:15:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-11-23 22:15:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 22:15:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2019-11-23 22:15:06,920 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 30 [2019-11-23 22:15:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:06,920 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2019-11-23 22:15:06,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:15:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2019-11-23 22:15:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:15:06,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:06,921 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:07,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:07,125 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:07,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:07,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1391268122, now seen corresponding path program 3 times [2019-11-23 22:15:07,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:07,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484843219] [2019-11-23 22:15:07,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 22:15:07,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484843219] [2019-11-23 22:15:07,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:07,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:15:07,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489383165] [2019-11-23 22:15:07,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:15:07,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:07,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:15:07,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:15:07,151 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 3 states. [2019-11-23 22:15:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:07,166 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2019-11-23 22:15:07,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:15:07,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2019-11-23 22:15:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:07,168 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:15:07,168 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 22:15:07,168 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 [2019-11-23 22:15:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 22:15:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-23 22:15:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:15:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-23 22:15:07,176 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2019-11-23 22:15:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:07,177 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-23 22:15:07,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:15:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-23 22:15:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:15:07,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:07,181 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:07,182 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:07,182 INFO L82 PathProgramCache]: Analyzing trace with hash -156395070, now seen corresponding path program 5 times [2019-11-23 22:15:07,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:07,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23033620] [2019-11-23 22:15:07,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:07,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23033620] [2019-11-23 22:15:07,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873991020] [2019-11-23 22:15:07,350 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:07,909 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 22:15:07,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:07,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:15:07,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:07,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:07,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 22:15:07,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401757208] [2019-11-23 22:15:07,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:15:07,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:07,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:15:07,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:15:07,938 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2019-11-23 22:15:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:08,148 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2019-11-23 22:15:08,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:15:08,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-11-23 22:15:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:08,149 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:15:08,149 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:15:08,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:15:08,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:15:08,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-11-23 22:15:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:15:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-11-23 22:15:08,155 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2019-11-23 22:15:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:08,156 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-11-23 22:15:08,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:15:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-11-23 22:15:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:15:08,156 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:08,157 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:08,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:08,368 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:08,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:08,368 INFO L82 PathProgramCache]: Analyzing trace with hash -965741696, now seen corresponding path program 4 times [2019-11-23 22:15:08,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:08,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373362441] [2019-11-23 22:15:08,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:09,151 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 51 [2019-11-23 22:15:11,580 WARN L192 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 199 DAG size of output: 69 [2019-11-23 22:15:11,934 WARN L192 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 69 [2019-11-23 22:15:14,774 WARN L192 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 277 DAG size of output: 85 [2019-11-23 22:15:17,573 WARN L192 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 218 DAG size of output: 79 [2019-11-23 22:15:19,316 WARN L192 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 211 DAG size of output: 78 [2019-11-23 22:15:22,649 WARN L192 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 172 DAG size of output: 54 [2019-11-23 22:15:26,113 WARN L192 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 47 [2019-11-23 22:15:29,702 WARN L192 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 158 DAG size of output: 40 [2019-11-23 22:15:29,968 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 24 [2019-11-23 22:15:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:30,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373362441] [2019-11-23 22:15:30,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3272583] [2019-11-23 22:15:30,465 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:30,597 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:15:30,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:30,599 WARN L253 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-23 22:15:30,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:30,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:31,049 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2019-11-23 22:15:31,050 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:31,060 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2019-11-23 22:15:31,061 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:31,145 INFO L567 ElimStorePlain]: treesize reduction 332, result has 9.3 percent of original size [2019-11-23 22:15:31,145 INFO L464 ElimStorePlain]: Eliminatee v_prenex_13 vanished before elimination [2019-11-23 22:15:31,145 INFO L464 ElimStorePlain]: Eliminatee v_prenex_12 vanished before elimination [2019-11-23 22:15:31,146 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-11-23 22:15:31,146 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:15:31,146 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:374, output treesize:34 [2019-11-23 22:15:31,629 WARN L192 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-11-23 22:15:35,547 WARN L192 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2019-11-23 22:15:37,532 WARN L192 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2019-11-23 22:15:39,226 WARN L192 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2019-11-23 22:15:39,951 WARN L192 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-11-23 22:15:45,015 WARN L192 SmtUtils]: Spent 4.76 s on a formula simplification. DAG size of input: 55 DAG size of output: 55