/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:08:54,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:08:54,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:08:54,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:08:54,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:08:54,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:08:54,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:08:54,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:08:54,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:08:54,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:08:54,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:08:54,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:08:54,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:08:54,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:08:54,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:08:54,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:08:54,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:08:54,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:08:54,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:08:54,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:08:54,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:08:54,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:08:54,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:08:54,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:08:54,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:08:54,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:08:54,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:08:54,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:08:54,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:08:54,850 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:08:54,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:08:54,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:08:54,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:08:54,853 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:08:54,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:08:54,853 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:08:54,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:08:54,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:08:54,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:08:54,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:08:54,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:08:54,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:08:54,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:08:54,855 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:08:54,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:08:54,855 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:08:54,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:08:54,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:08:54,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:08:54,856 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:08:54,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:08:54,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:08:54,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:08:54,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:08:54,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:08:54,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:08:54,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:08:54,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:08:54,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:08:55,137 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:08:55,155 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:08:55,159 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:08:55,160 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:08:55,160 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:08:55,162 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2019-11-23 22:08:55,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c6a4b180/0189ab9c44f24597857286e92f826afd/FLAG1cde79176 [2019-11-23 22:08:55,656 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:08:55,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2019-11-23 22:08:55,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c6a4b180/0189ab9c44f24597857286e92f826afd/FLAG1cde79176 [2019-11-23 22:08:56,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c6a4b180/0189ab9c44f24597857286e92f826afd [2019-11-23 22:08:56,046 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:08:56,047 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:08:56,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:08:56,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:08:56,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:08:56,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:08:56" (1/1) ... [2019-11-23 22:08:56,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a116110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56, skipping insertion in model container [2019-11-23 22:08:56,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:08:56" (1/1) ... [2019-11-23 22:08:56,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:08:56,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:08:56,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:08:56,254 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:08:56,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:08:56,293 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:08:56,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56 WrapperNode [2019-11-23 22:08:56,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:08:56,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:08:56,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:08:56,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:08:56,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56" (1/1) ... [2019-11-23 22:08:56,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56" (1/1) ... [2019-11-23 22:08:56,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:08:56,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:08:56,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:08:56,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:08:56,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56" (1/1) ... [2019-11-23 22:08:56,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56" (1/1) ... [2019-11-23 22:08:56,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56" (1/1) ... [2019-11-23 22:08:56,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56" (1/1) ... [2019-11-23 22:08:56,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56" (1/1) ... [2019-11-23 22:08:56,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56" (1/1) ... [2019-11-23 22:08:56,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56" (1/1) ... [2019-11-23 22:08:56,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:08:56,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:08:56,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:08:56,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:08:56,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:08:56,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:08:56,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:08:56,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:08:56,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:08:56,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:08:56,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:08:56,740 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:08:56,740 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 22:08:56,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:08:56 BoogieIcfgContainer [2019-11-23 22:08:56,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:08:56,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:08:56,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:08:56,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:08:56,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:08:56" (1/3) ... [2019-11-23 22:08:56,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70198d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:08:56, skipping insertion in model container [2019-11-23 22:08:56,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:56" (2/3) ... [2019-11-23 22:08:56,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70198d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:08:56, skipping insertion in model container [2019-11-23 22:08:56,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:08:56" (3/3) ... [2019-11-23 22:08:56,749 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2019-11-23 22:08:56,759 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:08:56,766 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:08:56,778 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:08:56,803 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:08:56,803 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:08:56,804 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:08:56,804 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:08:56,804 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:08:56,804 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:08:56,804 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:08:56,804 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:08:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 22:08:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:08:56,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:56,824 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:56,824 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:56,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:56,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1156778892, now seen corresponding path program 1 times [2019-11-23 22:08:56,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:56,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299407517] [2019-11-23 22:08:56,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:57,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299407517] [2019-11-23 22:08:57,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:08:57,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:08:57,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39523277] [2019-11-23 22:08:57,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:08:57,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:57,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:08:57,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:08:57,094 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-11-23 22:08:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:57,236 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2019-11-23 22:08:57,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:08:57,238 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:08:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:57,255 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:08:57,255 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:08:57,261 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 22:08:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:08:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2019-11-23 22:08:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:08:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-23 22:08:57,311 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-23 22:08:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:57,311 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-23 22:08:57,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:08:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-23 22:08:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:08:57,314 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:57,314 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:57,316 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:57,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1156719310, now seen corresponding path program 1 times [2019-11-23 22:08:57,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:57,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512503658] [2019-11-23 22:08:57,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:57,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512503658] [2019-11-23 22:08:57,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:08:57,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:08:57,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170751380] [2019-11-23 22:08:57,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:08:57,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:57,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:08:57,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:08:57,413 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2019-11-23 22:08:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:57,447 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2019-11-23 22:08:57,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:08:57,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 22:08:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:57,449 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:08:57,449 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:08:57,450 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 22:08:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:08:57,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2019-11-23 22:08:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:08:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-23 22:08:57,456 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-11-23 22:08:57,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:57,456 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-23 22:08:57,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:08:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-23 22:08:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:08:57,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:57,457 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:57,458 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:57,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:57,458 INFO L82 PathProgramCache]: Analyzing trace with hash 723292333, now seen corresponding path program 1 times [2019-11-23 22:08:57,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:57,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850454534] [2019-11-23 22:08:57,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:57,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850454534] [2019-11-23 22:08:57,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231468999] [2019-11-23 22:08:57,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:57,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:08:57,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:57,714 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 11 treesize of output 7 [2019-11-23 22:08:57,719 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:57,727 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:08:57,727 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:08:57,728 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-23 22:08:57,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:57,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:57,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2019-11-23 22:08:57,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219522000] [2019-11-23 22:08:57,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:08:57,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:57,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:08:57,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:08:57,786 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 8 states. [2019-11-23 22:08:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:57,926 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-11-23 22:08:57,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:08:57,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-11-23 22:08:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:57,928 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:08:57,928 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 22:08:57,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:08:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 22:08:57,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 16. [2019-11-23 22:08:57,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:08:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 22:08:57,935 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-11-23 22:08:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:57,935 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 22:08:57,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:08:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 22:08:57,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:08:57,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:57,937 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:58,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:58,141 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:58,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:58,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1125888878, now seen corresponding path program 2 times [2019-11-23 22:08:58,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:58,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007420941] [2019-11-23 22:08:58,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:58,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007420941] [2019-11-23 22:08:58,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087471114] [2019-11-23 22:08:58,234 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:58,289 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:08:58,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:58,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:08:58,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:58,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:58,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:08:58,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713521806] [2019-11-23 22:08:58,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:08:58,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:58,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:08:58,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:08:58,317 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2019-11-23 22:08:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:58,398 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2019-11-23 22:08:58,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:08:58,399 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 22:08:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:58,400 INFO L225 Difference]: With dead ends: 58 [2019-11-23 22:08:58,400 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 22:08:58,401 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 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 22:08:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 22:08:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 17. [2019-11-23 22:08:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:08:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-23 22:08:58,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2019-11-23 22:08:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:58,407 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-23 22:08:58,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:08:58,407 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-23 22:08:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:08:58,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:58,408 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:58,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:58,619 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:58,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:58,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1679035725, now seen corresponding path program 3 times [2019-11-23 22:08:58,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:58,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855757557] [2019-11-23 22:08:58,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:58,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855757557] [2019-11-23 22:08:58,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521368622] [2019-11-23 22:08:58,733 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:58,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:08:58,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:58,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:08:58,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:58,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:58,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 22:08:58,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183955560] [2019-11-23 22:08:58,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:08:58,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:58,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:08:58,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:08:58,804 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2019-11-23 22:08:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:58,903 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2019-11-23 22:08:58,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:08:58,904 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-23 22:08:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:58,905 INFO L225 Difference]: With dead ends: 69 [2019-11-23 22:08:58,905 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 22:08:58,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 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 22:08:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 22:08:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 18. [2019-11-23 22:08:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:08:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-23 22:08:58,911 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-11-23 22:08:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:58,911 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-23 22:08:58,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:08:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-23 22:08:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:08:58,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:58,912 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:59,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:59,115 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:59,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:59,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1562614798, now seen corresponding path program 4 times [2019-11-23 22:08:59,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:59,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025237819] [2019-11-23 22:08:59,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:59,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025237819] [2019-11-23 22:08:59,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296244312] [2019-11-23 22:08:59,263 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:59,315 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:08:59,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:59,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:08:59,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:59,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:59,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 22:08:59,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188349333] [2019-11-23 22:08:59,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:08:59,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:59,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:08:59,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:08:59,337 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2019-11-23 22:08:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:59,476 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2019-11-23 22:08:59,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:08:59,479 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-23 22:08:59,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:59,480 INFO L225 Difference]: With dead ends: 80 [2019-11-23 22:08:59,480 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 22:08:59,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 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 22:08:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 22:08:59,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 19. [2019-11-23 22:08:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:08:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-23 22:08:59,485 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2019-11-23 22:08:59,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:59,486 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-23 22:08:59,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:08:59,486 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-23 22:08:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:08:59,487 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:59,487 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:59,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:59,695 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:59,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1025434093, now seen corresponding path program 5 times [2019-11-23 22:08:59,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:59,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092314217] [2019-11-23 22:08:59,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:59,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092314217] [2019-11-23 22:08:59,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360884998] [2019-11-23 22:08:59,844 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:00,102 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 22:09:00,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:09:00,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:09:00,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:09:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:00,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:09:00,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 22:09:00,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667327587] [2019-11-23 22:09:00,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:09:00,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:09:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:09:00,136 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 9 states. [2019-11-23 22:09:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:00,336 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2019-11-23 22:09:00,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:09:00,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-23 22:09:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:00,337 INFO L225 Difference]: With dead ends: 91 [2019-11-23 22:09:00,337 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 22:09:00,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 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 22:09:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 22:09:00,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 20. [2019-11-23 22:09:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:09:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-23 22:09:00,343 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2019-11-23 22:09:00,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:00,343 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-23 22:09:00,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:09:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-23 22:09:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:09:00,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:00,344 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:09:00,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:00,553 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:00,553 INFO L82 PathProgramCache]: Analyzing trace with hash -349428910, now seen corresponding path program 6 times [2019-11-23 22:09:00,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:00,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122029097] [2019-11-23 22:09:00,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:00,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122029097] [2019-11-23 22:09:00,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893665006] [2019-11-23 22:09:00,680 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:00,760 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 22:09:00,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:09:00,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:09:00,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:09:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:00,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:09:00,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 22:09:00,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484708914] [2019-11-23 22:09:00,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:09:00,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:00,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:09:00,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:09:00,800 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2019-11-23 22:09:00,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:00,992 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2019-11-23 22:09:00,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:09:00,993 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-23 22:09:00,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:00,993 INFO L225 Difference]: With dead ends: 102 [2019-11-23 22:09:00,994 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 22:09:00,994 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 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 22:09:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 22:09:00,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 21. [2019-11-23 22:09:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:09:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 22:09:00,999 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2019-11-23 22:09:01,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:01,000 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 22:09:01,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:09:01,000 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 22:09:01,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:09:01,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:01,001 INFO L410 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:09:01,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:01,201 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:01,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:01,202 INFO L82 PathProgramCache]: Analyzing trace with hash -20509043, now seen corresponding path program 7 times [2019-11-23 22:09:01,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:01,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137080498] [2019-11-23 22:09:01,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:01,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137080498] [2019-11-23 22:09:01,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101803864] [2019-11-23 22:09:01,340 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:01,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:09:01,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:09:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:01,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:09:01,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:09:01,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54243896] [2019-11-23 22:09:01,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:09:01,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:01,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:09:01,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:09:01,417 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 11 states. [2019-11-23 22:09:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:01,690 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2019-11-23 22:09:01,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:09:01,690 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-11-23 22:09:01,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:01,692 INFO L225 Difference]: With dead ends: 113 [2019-11-23 22:09:01,692 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 22:09:01,693 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:09:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 22:09:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 22. [2019-11-23 22:09:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:09:01,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-23 22:09:01,698 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2019-11-23 22:09:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:01,698 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-23 22:09:01,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:09:01,699 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-23 22:09:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:09:01,699 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:01,699 INFO L410 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:09:01,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:01,903 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:01,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:01,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1586072242, now seen corresponding path program 8 times [2019-11-23 22:09:01,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:01,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209839285] [2019-11-23 22:09:01,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:02,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209839285] [2019-11-23 22:09:02,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871700657] [2019-11-23 22:09:02,051 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:02,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:09:02,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:09:02,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:09:02,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:09:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:02,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:09:02,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:09:02,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361799492] [2019-11-23 22:09:02,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:09:02,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:02,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:09:02,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:09:02,149 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 12 states. [2019-11-23 22:09:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:02,486 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2019-11-23 22:09:02,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:09:02,487 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-23 22:09:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:02,487 INFO L225 Difference]: With dead ends: 124 [2019-11-23 22:09:02,488 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 22:09:02,488 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:09:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 22:09:02,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 23. [2019-11-23 22:09:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:09:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-23 22:09:02,494 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2019-11-23 22:09:02,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:02,494 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-23 22:09:02,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:09:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-23 22:09:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:09:02,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:02,495 INFO L410 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:09:02,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:02,704 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:02,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:02,704 INFO L82 PathProgramCache]: Analyzing trace with hash -149515475, now seen corresponding path program 9 times [2019-11-23 22:09:02,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:02,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369481918] [2019-11-23 22:09:02,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:02,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369481918] [2019-11-23 22:09:02,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847183619] [2019-11-23 22:09:02,897 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:38,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:09:38,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:09:38,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:09:38,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:09:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:38,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:09:38,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 22:09:38,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727995505] [2019-11-23 22:09:38,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:09:38,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:38,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:09:38,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:09:38,626 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 13 states. [2019-11-23 22:09:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:39,014 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2019-11-23 22:09:39,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:09:39,014 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-11-23 22:09:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:39,015 INFO L225 Difference]: With dead ends: 135 [2019-11-23 22:09:39,015 INFO L226 Difference]: Without dead ends: 124 [2019-11-23 22:09:39,016 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:09:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-23 22:09:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 24. [2019-11-23 22:09:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:09:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-23 22:09:39,021 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2019-11-23 22:09:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:39,022 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-23 22:09:39,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:09:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-23 22:09:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:09:39,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:39,023 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:09:39,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:39,231 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:39,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:39,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1881840146, now seen corresponding path program 10 times [2019-11-23 22:09:39,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:39,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43501019] [2019-11-23 22:09:39,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:39,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43501019] [2019-11-23 22:09:39,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883783225] [2019-11-23 22:09:39,397 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:39,439 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:09:39,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:09:39,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:09:39,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:09:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:39,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:09:39,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 22:09:39,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772430189] [2019-11-23 22:09:39,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:09:39,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:39,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:09:39,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:09:39,473 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2019-11-23 22:09:39,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:39,936 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2019-11-23 22:09:39,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:09:39,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-11-23 22:09:39,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:39,938 INFO L225 Difference]: With dead ends: 146 [2019-11-23 22:09:39,938 INFO L226 Difference]: Without dead ends: 135 [2019-11-23 22:09:39,939 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:09:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-23 22:09:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 25. [2019-11-23 22:09:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:09:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-11-23 22:09:39,949 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2019-11-23 22:09:39,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:39,951 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-23 22:09:39,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:09:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-11-23 22:09:39,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:09:39,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:39,953 INFO L410 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:09:40,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:40,154 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:40,155 INFO L82 PathProgramCache]: Analyzing trace with hash 429354957, now seen corresponding path program 11 times [2019-11-23 22:09:40,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:40,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843366257] [2019-11-23 22:09:40,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:40,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843366257] [2019-11-23 22:09:40,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658428389] [2019-11-23 22:09:40,389 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true