/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:07:57,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:07:57,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:07:57,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:07:57,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:07:57,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:07:57,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:07:57,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:07:57,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:07:57,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:07:57,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:07:57,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:07:57,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:07:57,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:07:57,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:07:57,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:07:57,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:07:57,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:07:57,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:07:57,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:07:57,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:07:57,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:07:57,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:07:57,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:07:57,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:07:57,945 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 22:07:57,959 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:07:57,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:07:57,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:07:57,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:07:57,961 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:07:57,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:07:57,961 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:07:57,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:07:57,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:07:57,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:07:57,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:07:57,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:07:57,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:07:57,963 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:07:57,963 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:07:57,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:07:57,963 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:07:57,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:07:57,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:07:57,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:07:57,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:07:57,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:07:57,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:07:57,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:07:57,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:07:57,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:07:57,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:07:57,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:07:57,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:07:57,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:07:58,226 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:07:58,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:07:58,247 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:07:58,249 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:07:58,249 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:07:58,250 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2019-11-23 22:07:58,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01ade69c7/20484a8bf2884b459a49e9b2433968a2/FLAG4e878e729 [2019-11-23 22:07:58,793 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:07:58,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2019-11-23 22:07:58,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01ade69c7/20484a8bf2884b459a49e9b2433968a2/FLAG4e878e729 [2019-11-23 22:07:59,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01ade69c7/20484a8bf2884b459a49e9b2433968a2 [2019-11-23 22:07:59,176 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:07:59,178 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:07:59,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:07:59,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:07:59,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:07:59,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:07:59" (1/1) ... [2019-11-23 22:07:59,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b66c488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59, skipping insertion in model container [2019-11-23 22:07:59,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:07:59" (1/1) ... [2019-11-23 22:07:59,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:07:59,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:07:59,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:07:59,440 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:07:59,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:07:59,471 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:07:59,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59 WrapperNode [2019-11-23 22:07:59,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:07:59,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:07:59,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:07:59,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:07:59,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59" (1/1) ... [2019-11-23 22:07:59,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59" (1/1) ... [2019-11-23 22:07:59,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:07:59,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:07:59,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:07:59,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:07:59,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59" (1/1) ... [2019-11-23 22:07:59,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59" (1/1) ... [2019-11-23 22:07:59,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59" (1/1) ... [2019-11-23 22:07:59,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59" (1/1) ... [2019-11-23 22:07:59,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59" (1/1) ... [2019-11-23 22:07:59,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59" (1/1) ... [2019-11-23 22:07:59,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59" (1/1) ... [2019-11-23 22:07:59,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:07:59,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:07:59,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:07:59,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:07:59,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59" (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 22:07:59,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:07:59,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:07:59,842 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:07:59,842 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 22:07:59,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:07:59 BoogieIcfgContainer [2019-11-23 22:07:59,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:07:59,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:07:59,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:07:59,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:07:59,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:07:59" (1/3) ... [2019-11-23 22:07:59,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56642f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:07:59, skipping insertion in model container [2019-11-23 22:07:59,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:59" (2/3) ... [2019-11-23 22:07:59,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56642f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:07:59, skipping insertion in model container [2019-11-23 22:07:59,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:07:59" (3/3) ... [2019-11-23 22:07:59,852 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2019-11-23 22:07:59,862 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:07:59,869 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:07:59,879 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:07:59,902 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:07:59,902 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:07:59,902 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:07:59,902 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:07:59,903 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:07:59,903 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:07:59,903 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:07:59,903 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:07:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:07:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 22:07:59,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:59,920 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 22:07:59,920 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:59,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:59,925 INFO L82 PathProgramCache]: Analyzing trace with hash 29817909, now seen corresponding path program 1 times [2019-11-23 22:07:59,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:59,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837136024] [2019-11-23 22:07:59,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:00,147 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 22:08:00,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837136024] [2019-11-23 22:08:00,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:08:00,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:08:00,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65998150] [2019-11-23 22:08:00,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:08:00,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:00,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:08:00,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:08:00,217 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 22:08:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:00,258 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2019-11-23 22:08:00,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:08:00,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-23 22:08:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:00,270 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:08:00,270 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:08:00,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:08:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:08:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2019-11-23 22:08:00,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 22:08:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-23 22:08:00,302 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-11-23 22:08:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:00,302 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-23 22:08:00,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:08:00,303 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-23 22:08:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:08:00,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:00,303 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:00,304 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:00,305 INFO L82 PathProgramCache]: Analyzing trace with hash 728659877, now seen corresponding path program 1 times [2019-11-23 22:08:00,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:00,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708914580] [2019-11-23 22:08:00,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:00,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708914580] [2019-11-23 22:08:00,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:08:00,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:08:00,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50228677] [2019-11-23 22:08:00,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:08:00,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:00,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:08:00,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:08:00,395 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2019-11-23 22:08:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:00,408 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2019-11-23 22:08:00,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:08:00,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 22:08:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:00,410 INFO L225 Difference]: With dead ends: 17 [2019-11-23 22:08:00,410 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:08:00,411 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 22:08:00,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:08:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:08:00,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:08:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-23 22:08:00,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2019-11-23 22:08:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:00,416 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-23 22:08:00,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:08:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-23 22:08:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:08:00,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:00,417 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:00,418 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:00,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:00,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1564831260, now seen corresponding path program 1 times [2019-11-23 22:08:00,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:00,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261491020] [2019-11-23 22:08:00,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:00,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261491020] [2019-11-23 22:08:00,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652811374] [2019-11-23 22:08:00,506 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 22:08:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:00,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:08:00,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:00,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:00,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2019-11-23 22:08:00,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283114526] [2019-11-23 22:08:00,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:08:00,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:00,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:08:00,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:08:00,606 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 7 states. [2019-11-23 22:08:00,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:00,733 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2019-11-23 22:08:00,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:08:00,733 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-23 22:08:00,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:00,734 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:08:00,734 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:08:00,735 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:08:00,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:08:00,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2019-11-23 22:08:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:08:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 22:08:00,741 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2019-11-23 22:08:00,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:00,741 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 22:08:00,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:08:00,741 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 22:08:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:08:00,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:00,742 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-23 22:08:00,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:00,949 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:00,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:00,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1249079755, now seen corresponding path program 2 times [2019-11-23 22:08:00,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:00,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068973052] [2019-11-23 22:08:00,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:08:01,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068973052] [2019-11-23 22:08:01,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109358941] [2019-11-23 22:08:01,093 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) [2019-11-23 22:08:01,138 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:08:01,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:01,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:08:01,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:08:01,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:01,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2019-11-23 22:08:01,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656101206] [2019-11-23 22:08:01,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:08:01,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:01,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:08:01,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:08:01,187 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-11-23 22:08:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:01,472 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-11-23 22:08:01,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:08:01,472 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-23 22:08:01,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:01,473 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:08:01,474 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:08:01,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:08:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:08:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2019-11-23 22:08:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:08:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-23 22:08:01,482 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2019-11-23 22:08:01,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:01,483 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-23 22:08:01,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:08:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-23 22:08:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:08:01,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:01,484 INFO L410 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1] [2019-11-23 22:08:01,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:01,696 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:01,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:01,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1525597154, now seen corresponding path program 3 times [2019-11-23 22:08:01,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:01,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000103755] [2019-11-23 22:08:01,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 22:08:01,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000103755] [2019-11-23 22:08:01,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079075969] [2019-11-23 22:08:01,838 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 22:08:01,907 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:08:01,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:01,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:08:01,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 22:08:01,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:01,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 22:08:01,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707100779] [2019-11-23 22:08:01,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:08:01,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:01,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:08:01,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:08:01,957 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 7 states. [2019-11-23 22:08:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:02,008 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2019-11-23 22:08:02,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:08:02,009 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-11-23 22:08:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:02,011 INFO L225 Difference]: With dead ends: 45 [2019-11-23 22:08:02,011 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:08:02,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 2 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 22:08:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:08:02,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 22:08:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:08:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-23 22:08:02,022 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2019-11-23 22:08:02,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:02,022 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-23 22:08:02,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:08:02,022 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-23 22:08:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:08:02,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:02,023 INFO L410 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1] [2019-11-23 22:08:02,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:02,224 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:02,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:02,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1967539557, now seen corresponding path program 4 times [2019-11-23 22:08:02,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:02,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831519058] [2019-11-23 22:08:02,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 22:08:02,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831519058] [2019-11-23 22:08:02,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032202327] [2019-11-23 22:08:02,401 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 22:08:02,447 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:08:02,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:02,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:08:02,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 22:08:02,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:02,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2019-11-23 22:08:02,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711769205] [2019-11-23 22:08:02,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:08:02,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:02,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:08:02,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:08:02,575 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 15 states. [2019-11-23 22:08:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:03,019 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2019-11-23 22:08:03,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:08:03,019 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2019-11-23 22:08:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:03,020 INFO L225 Difference]: With dead ends: 65 [2019-11-23 22:08:03,020 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 22:08:03,021 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:08:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 22:08:03,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2019-11-23 22:08:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 22:08:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-11-23 22:08:03,046 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2019-11-23 22:08:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:03,046 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-11-23 22:08:03,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:08:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-11-23 22:08:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:08:03,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:03,051 INFO L410 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1] [2019-11-23 22:08:03,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:03,252 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:03,252 INFO L82 PathProgramCache]: Analyzing trace with hash -968582671, now seen corresponding path program 5 times [2019-11-23 22:08:03,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:03,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892887739] [2019-11-23 22:08:03,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-11-23 22:08:03,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892887739] [2019-11-23 22:08:03,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142768341] [2019-11-23 22:08:03,419 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:03,455 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 22:08:03,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:03,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:08:03,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-23 22:08:03,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:03,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 22:08:03,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492122186] [2019-11-23 22:08:03,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:08:03,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:03,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:08:03,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:08:03,496 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 9 states. [2019-11-23 22:08:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:03,554 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-11-23 22:08:03,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:08:03,554 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-11-23 22:08:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:03,555 INFO L225 Difference]: With dead ends: 72 [2019-11-23 22:08:03,555 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:08:03,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:08:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:08:03,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-23 22:08:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:08:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 22:08:03,565 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 37 [2019-11-23 22:08:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:03,565 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 22:08:03,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:08:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 22:08:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:08:03,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:03,566 INFO L410 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 1, 1, 1, 1, 1] [2019-11-23 22:08:03,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:03,770 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:03,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:03,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1848467509, now seen corresponding path program 6 times [2019-11-23 22:08:03,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:03,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830578842] [2019-11-23 22:08:03,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-23 22:08:03,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830578842] [2019-11-23 22:08:03,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392670101] [2019-11-23 22:08:03,902 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 22:08:04,048 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-23 22:08:04,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:04,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:08:04,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 254 proven. 21 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-23 22:08:04,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:04,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 22:08:04,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411991056] [2019-11-23 22:08:04,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:08:04,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:04,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:08:04,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:08:04,081 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 22:08:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:04,157 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2019-11-23 22:08:04,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:08:04,158 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 22:08:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:04,158 INFO L225 Difference]: With dead ends: 79 [2019-11-23 22:08:04,160 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:08:04,161 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:08:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:08:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-23 22:08:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 22:08:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-11-23 22:08:04,176 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 41 [2019-11-23 22:08:04,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:04,177 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-11-23 22:08:04,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:08:04,177 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-11-23 22:08:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 22:08:04,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:04,181 INFO L410 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 1, 1, 1, 1, 1] [2019-11-23 22:08:04,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:04,382 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:04,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:04,383 INFO L82 PathProgramCache]: Analyzing trace with hash -50791439, now seen corresponding path program 7 times [2019-11-23 22:08:04,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:04,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727755555] [2019-11-23 22:08:04,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 22:08:04,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727755555] [2019-11-23 22:08:04,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743250919] [2019-11-23 22:08:04,510 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 22:08:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:04,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:08:04,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-11-23 22:08:04,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:04,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2019-11-23 22:08:04,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340782583] [2019-11-23 22:08:04,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:08:04,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:04,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:08:04,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:08:04,802 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 20 states. [2019-11-23 22:08:05,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:05,853 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2019-11-23 22:08:05,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 22:08:05,856 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2019-11-23 22:08:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:05,857 INFO L225 Difference]: With dead ends: 107 [2019-11-23 22:08:05,858 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 22:08:05,859 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=2706, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:08:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 22:08:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2019-11-23 22:08:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 22:08:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2019-11-23 22:08:05,869 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 45 [2019-11-23 22:08:05,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:05,869 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2019-11-23 22:08:05,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:08:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2019-11-23 22:08:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:08:05,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:05,870 INFO L410 BasicCegarLoop]: trace histogram [40, 5, 5, 5, 1, 1, 1, 1, 1] [2019-11-23 22:08:06,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:06,081 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash -500026587, now seen corresponding path program 8 times [2019-11-23 22:08:06,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:06,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506165514] [2019-11-23 22:08:06,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2019-11-23 22:08:06,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506165514] [2019-11-23 22:08:06,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852565995] [2019-11-23 22:08:06,255 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 22:08:06,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:08:06,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:06,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:08:06,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 0 proven. 868 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 22:08:06,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:06,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2019-11-23 22:08:06,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772875813] [2019-11-23 22:08:06,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:08:06,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:06,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:08:06,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:08:06,512 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 23 states. [2019-11-23 22:08:07,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:07,977 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2019-11-23 22:08:07,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-11-23 22:08:07,977 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2019-11-23 22:08:07,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:07,978 INFO L225 Difference]: With dead ends: 139 [2019-11-23 22:08:07,979 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 22:08:07,981 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=4619, Unknown=0, NotChecked=0, Total=4970 [2019-11-23 22:08:07,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 22:08:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2019-11-23 22:08:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 22:08:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2019-11-23 22:08:07,992 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 60 [2019-11-23 22:08:07,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:07,992 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2019-11-23 22:08:07,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:08:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2019-11-23 22:08:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 22:08:07,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:07,994 INFO L410 BasicCegarLoop]: trace histogram [54, 6, 6, 6, 1, 1, 1, 1, 1] [2019-11-23 22:08:08,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:08,199 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:08,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:08,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1339762639, now seen corresponding path program 9 times [2019-11-23 22:08:08,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:08,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423387084] [2019-11-23 22:08:08,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1255 trivial. 0 not checked. [2019-11-23 22:08:08,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423387084] [2019-11-23 22:08:08,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400529319] [2019-11-23 22:08:08,383 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 22:08:08,564 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 22:08:08,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:08,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:08:08,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1255 trivial. 0 not checked. [2019-11-23 22:08:08,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:08,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 22:08:08,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240116065] [2019-11-23 22:08:08,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:08:08,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:08,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:08:08,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:08:08,609 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 13 states. [2019-11-23 22:08:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:08,704 INFO L93 Difference]: Finished difference Result 150 states and 167 transitions. [2019-11-23 22:08:08,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:08:08,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2019-11-23 22:08:08,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:08,719 INFO L225 Difference]: With dead ends: 150 [2019-11-23 22:08:08,719 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 22:08:08,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:08:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 22:08:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-11-23 22:08:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 22:08:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2019-11-23 22:08:08,744 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 77 [2019-11-23 22:08:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:08,745 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2019-11-23 22:08:08,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:08:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2019-11-23 22:08:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 22:08:08,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:08,749 INFO L410 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1] [2019-11-23 22:08:08,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:08,956 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:08,956 INFO L82 PathProgramCache]: Analyzing trace with hash 923710005, now seen corresponding path program 10 times [2019-11-23 22:08:08,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:08,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911544745] [2019-11-23 22:08:08,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 22:08:09,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911544745] [2019-11-23 22:08:09,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797227237] [2019-11-23 22:08:09,144 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 22:08:09,219 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:08:09,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:09,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:08:09,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1900 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2019-11-23 22:08:09,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:09,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 16 [2019-11-23 22:08:09,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112266156] [2019-11-23 22:08:09,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:08:09,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:09,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:08:09,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:08:09,385 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 17 states. [2019-11-23 22:08:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:09,682 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2019-11-23 22:08:09,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:08:09,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 22:08:09,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:09,684 INFO L225 Difference]: With dead ends: 113 [2019-11-23 22:08:09,684 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 22:08:09,685 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:08:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 22:08:09,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2019-11-23 22:08:09,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 22:08:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2019-11-23 22:08:09,697 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 83 [2019-11-23 22:08:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:09,698 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2019-11-23 22:08:09,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:08:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2019-11-23 22:08:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 22:08:09,699 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:09,699 INFO L410 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1] [2019-11-23 22:08:09,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:09,904 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1620952827, now seen corresponding path program 11 times [2019-11-23 22:08:09,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:09,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428660017] [2019-11-23 22:08:09,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-23 22:08:10,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428660017] [2019-11-23 22:08:10,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581417954] [2019-11-23 22:08:10,127 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