/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/reducercommutativity/avg60-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:25:42,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:25:42,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:25:42,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:25:42,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:25:42,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:25:42,704 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:25:42,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:25:42,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:25:42,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:25:42,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:25:42,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:25:42,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:25:42,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:25:42,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:25:42,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:25:42,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:25:42,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:25:42,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:25:42,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:25:42,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:25:42,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:25:42,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:25:42,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:25:42,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:25:42,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:25:42,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:25:42,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:25:42,763 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 22:25:42,784 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:25:42,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:25:42,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:25:42,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:25:42,786 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:25:42,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:25:42,789 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:25:42,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:25:42,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:25:42,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:25:42,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:25:42,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:25:42,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:25:42,790 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:25:42,790 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:25:42,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:25:42,792 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:25:42,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:25:42,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:25:42,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:25:42,794 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:25:42,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:25:42,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:25:42,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:25:42,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:25:42,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:25:42,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:25:42,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:25:42,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:25:42,796 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:25:43,058 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:25:43,076 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:25:43,080 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:25:43,082 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:25:43,083 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:25:43,084 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg60-1.i [2019-11-23 22:25:43,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aecd72ba8/05475059e7bb471d8e52a1ac856f9f33/FLAGd66016c09 [2019-11-23 22:25:43,614 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:25:43,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg60-1.i [2019-11-23 22:25:43,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aecd72ba8/05475059e7bb471d8e52a1ac856f9f33/FLAGd66016c09 [2019-11-23 22:25:44,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aecd72ba8/05475059e7bb471d8e52a1ac856f9f33 [2019-11-23 22:25:44,052 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:25:44,053 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:25:44,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:25:44,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:25:44,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:25:44,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:25:44" (1/1) ... [2019-11-23 22:25:44,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@154386d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44, skipping insertion in model container [2019-11-23 22:25:44,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:25:44" (1/1) ... [2019-11-23 22:25:44,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:25:44,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:25:44,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:25:44,293 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:25:44,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:25:44,326 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:25:44,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44 WrapperNode [2019-11-23 22:25:44,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:25:44,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:25:44,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:25:44,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:25:44,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44" (1/1) ... [2019-11-23 22:25:44,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44" (1/1) ... [2019-11-23 22:25:44,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:25:44,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:25:44,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:25:44,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:25:44,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44" (1/1) ... [2019-11-23 22:25:44,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44" (1/1) ... [2019-11-23 22:25:44,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44" (1/1) ... [2019-11-23 22:25:44,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44" (1/1) ... [2019-11-23 22:25:44,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44" (1/1) ... [2019-11-23 22:25:44,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44" (1/1) ... [2019-11-23 22:25:44,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44" (1/1) ... [2019-11-23 22:25:44,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:25:44,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:25:44,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:25:44,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:25:44,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44" (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 22:25:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:25:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:25:44,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:25:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:25:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:25:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:25:44,881 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:25:44,881 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:25:44,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:25:44 BoogieIcfgContainer [2019-11-23 22:25:44,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:25:44,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:25:44,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:25:44,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:25:44,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:25:44" (1/3) ... [2019-11-23 22:25:44,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751ac84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:25:44, skipping insertion in model container [2019-11-23 22:25:44,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:44" (2/3) ... [2019-11-23 22:25:44,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751ac84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:25:44, skipping insertion in model container [2019-11-23 22:25:44,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:25:44" (3/3) ... [2019-11-23 22:25:44,891 INFO L109 eAbstractionObserver]: Analyzing ICFG avg60-1.i [2019-11-23 22:25:44,902 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:25:44,908 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:25:44,919 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:25:44,939 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:25:44,940 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:25:44,940 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:25:44,940 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:25:44,940 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:25:44,940 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:25:44,940 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:25:44,940 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:25:44,953 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 22:25:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:25:44,958 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:44,959 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:44,959 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:44,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 22:25:44,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:44,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329049911] [2019-11-23 22:25:44,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:45,150 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 22:25:45,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329049911] [2019-11-23 22:25:45,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:25:45,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:25:45,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518830474] [2019-11-23 22:25:45,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:25:45,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:45,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:25:45,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:25:45,178 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 22:25:45,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:45,216 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 22:25:45,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:25:45,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:25:45,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:45,228 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:25:45,228 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:25:45,232 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 22:25:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:25:45,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 22:25:45,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:25:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 22:25:45,277 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 22:25:45,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:45,277 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 22:25:45,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:25:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 22:25:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:25:45,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:45,279 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:45,280 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:45,280 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 22:25:45,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:45,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891042560] [2019-11-23 22:25:45,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:25:45,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891042560] [2019-11-23 22:25:45,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:25:45,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:25:45,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542384242] [2019-11-23 22:25:45,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:25:45,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:45,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:25:45,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:25:45,373 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 22:25:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:45,447 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 22:25:45,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:25:45,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:25:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:45,450 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:25:45,450 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:25:45,451 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 22:25:45,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:25:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 22:25:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:25:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 22:25:45,464 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 22:25:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:45,465 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 22:25:45,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:25:45,465 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 22:25:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:25:45,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:45,469 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:45,469 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:45,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 22:25:45,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:45,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21772915] [2019-11-23 22:25:45,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:25:45,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21772915] [2019-11-23 22:25:45,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:25:45,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:25:45,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462492275] [2019-11-23 22:25:45,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:25:45,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:45,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:25:45,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:25:45,583 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 22:25:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:45,601 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 22:25:45,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:25:45,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 22:25:45,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:45,603 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:25:45,603 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:25:45,604 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 22:25:45,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:25:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 22:25:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:25:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 22:25:45,610 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 22:25:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:45,610 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 22:25:45,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:25:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 22:25:45,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:25:45,612 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:45,612 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:45,612 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:45,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:45,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 22:25:45,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:45,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798203377] [2019-11-23 22:25:45,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:25:45,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798203377] [2019-11-23 22:25:45,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155845277] [2019-11-23 22:25:45,711 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 22:25:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:45,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:25:45,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:25:45,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:45,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:25:45,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833138161] [2019-11-23 22:25:45,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:25:45,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:45,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:25:45,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:25:45,865 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 22:25:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:45,897 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 22:25:45,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:25:45,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 22:25:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:45,899 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:25:45,900 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:25:45,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:25:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:25:45,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 22:25:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:25:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 22:25:45,912 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 22:25:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:45,913 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 22:25:45,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:25:45,913 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 22:25:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:25:45,915 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:45,916 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:46,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:46,121 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:46,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:46,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 22:25:46,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:46,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799172764] [2019-11-23 22:25:46,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:25:46,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799172764] [2019-11-23 22:25:46,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449265549] [2019-11-23 22:25:46,245 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 22:25:46,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:46,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:46,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:25:46,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:25:46,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:46,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 22:25:46,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337394102] [2019-11-23 22:25:46,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:25:46,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:25:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:25:46,381 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 22:25:46,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:46,444 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 22:25:46,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:25:46,447 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 22:25:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:46,447 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:25:46,447 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:25:46,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:25:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:25:46,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 22:25:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:25:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 22:25:46,459 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 22:25:46,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:46,460 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 22:25:46,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:25:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 22:25:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:25:46,461 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:46,461 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:46,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:46,676 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:46,677 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 22:25:46,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:46,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415265520] [2019-11-23 22:25:46,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:25:46,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415265520] [2019-11-23 22:25:46,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060738962] [2019-11-23 22:25:46,767 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 22:25:46,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:25:46,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:46,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:25:46,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:25:46,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:46,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:25:46,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850888093] [2019-11-23 22:25:46,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:25:46,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:46,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:25:46,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:25:46,856 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 22:25:46,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:46,948 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 22:25:46,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:25:46,948 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 22:25:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:46,949 INFO L225 Difference]: With dead ends: 71 [2019-11-23 22:25:46,949 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:25:46,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:25:46,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:25:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 22:25:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:25:46,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 22:25:46,956 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 22:25:46,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:46,956 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 22:25:46,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:25:46,957 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 22:25:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:25:46,958 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:46,958 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:47,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:47,163 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:47,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 22:25:47,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:47,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311180729] [2019-11-23 22:25:47,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:25:47,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311180729] [2019-11-23 22:25:47,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186753989] [2019-11-23 22:25:47,271 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 22:25:47,343 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:47,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:47,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:25:47,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 22:25:47,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:47,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 22:25:47,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352363690] [2019-11-23 22:25:47,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:25:47,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:47,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:25:47,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:25:47,390 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 22:25:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:47,517 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 22:25:47,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:25:47,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 22:25:47,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:47,518 INFO L225 Difference]: With dead ends: 85 [2019-11-23 22:25:47,519 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:25:47,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:25:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:25:47,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 22:25:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:25:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 22:25:47,532 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 22:25:47,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:47,532 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 22:25:47,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:25:47,532 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 22:25:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:25:47,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:47,539 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:47,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:47,740 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:47,740 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 22:25:47,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:47,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895453575] [2019-11-23 22:25:47,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 22:25:47,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895453575] [2019-11-23 22:25:47,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867987796] [2019-11-23 22:25:47,831 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 22:25:47,915 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:25:47,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:47,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:25:47,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:25:48,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:48,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 22:25:48,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389638855] [2019-11-23 22:25:48,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:25:48,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:25:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:48,002 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 22:25:48,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:48,129 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 22:25:48,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:25:48,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 22:25:48,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:48,130 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:25:48,130 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:25:48,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:25:48,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 22:25:48,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:25:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 22:25:48,149 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 22:25:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:48,149 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 22:25:48,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:25:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 22:25:48,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:25:48,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:48,154 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:48,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:48,358 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:48,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:48,359 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 22:25:48,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:48,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907897686] [2019-11-23 22:25:48,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 22:25:48,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907897686] [2019-11-23 22:25:48,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161914281] [2019-11-23 22:25:48,509 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 22:25:48,588 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 22:25:48,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:48,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:25:48,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 22:25:48,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:48,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 22:25:48,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091820800] [2019-11-23 22:25:48,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:25:48,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:25:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:48,639 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 22:25:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:48,708 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 22:25:48,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:25:48,709 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 22:25:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:48,710 INFO L225 Difference]: With dead ends: 107 [2019-11-23 22:25:48,710 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:25:48,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:25:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 22:25:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:25:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 22:25:48,722 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 22:25:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:48,725 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 22:25:48,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:25:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 22:25:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:25:48,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:48,727 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:48,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:48,931 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:48,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:48,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 22:25:48,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:48,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913641565] [2019-11-23 22:25:48,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:49,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913641565] [2019-11-23 22:25:49,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587947810] [2019-11-23 22:25:49,031 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 22:25:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:49,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:25:49,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:49,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:49,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:25:49,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139285468] [2019-11-23 22:25:49,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:25:49,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:49,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:25:49,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:25:49,149 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 22:25:49,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:49,181 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 22:25:49,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:25:49,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 22:25:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:49,182 INFO L225 Difference]: With dead ends: 110 [2019-11-23 22:25:49,183 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 22:25:49,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:25:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 22:25:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 22:25:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 22:25:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 22:25:49,190 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 22:25:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:49,190 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 22:25:49,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:25:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 22:25:49,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:25:49,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:49,191 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:49,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:49,396 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:49,396 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 22:25:49,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:49,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561556339] [2019-11-23 22:25:49,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:49,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561556339] [2019-11-23 22:25:49,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837657474] [2019-11-23 22:25:49,517 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 22:25:49,590 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:49,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:49,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:25:49,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:49,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:49,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:25:49,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958766426] [2019-11-23 22:25:49,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:25:49,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:49,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:25:49,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:49,620 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 22:25:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:49,653 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 22:25:49,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:25:49,654 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 22:25:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:49,655 INFO L225 Difference]: With dead ends: 112 [2019-11-23 22:25:49,655 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:25:49,655 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:25:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 22:25:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 22:25:49,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 22:25:49,667 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 22:25:49,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:49,667 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 22:25:49,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:25:49,667 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 22:25:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 22:25:49,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:49,668 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:49,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:49,876 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:49,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 22:25:49,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:49,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394393324] [2019-11-23 22:25:49,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:50,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394393324] [2019-11-23 22:25:50,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543070097] [2019-11-23 22:25:50,025 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 22:25:50,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:25:50,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:50,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:25:50,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 22:25:50,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:50,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 22:25:50,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170238410] [2019-11-23 22:25:50,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:25:50,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:50,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:25:50,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:25:50,209 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 22:25:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:50,286 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 22:25:50,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:25:50,287 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 22:25:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:50,288 INFO L225 Difference]: With dead ends: 117 [2019-11-23 22:25:50,288 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 22:25:50,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:25:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 22:25:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 22:25:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 22:25:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 22:25:50,300 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 22:25:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:50,306 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 22:25:50,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:25:50,306 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 22:25:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 22:25:50,307 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:50,308 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:50,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:50,521 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:50,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:50,521 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 22:25:50,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:50,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516473218] [2019-11-23 22:25:50,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:25:50,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516473218] [2019-11-23 22:25:50,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239859707] [2019-11-23 22:25:50,667 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 22:25:50,738 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:50,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:50,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:25:50,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:25:50,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:50,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 22:25:50,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084676196] [2019-11-23 22:25:50,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:25:50,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:50,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:25:50,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:25:50,760 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 22:25:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:50,803 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 22:25:50,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:25:50,804 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 22:25:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:50,805 INFO L225 Difference]: With dead ends: 120 [2019-11-23 22:25:50,805 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 22:25:50,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:25:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 22:25:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 22:25:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 22:25:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 22:25:50,811 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 22:25:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:50,811 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 22:25:50,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:25:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 22:25:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:25:50,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:50,812 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:51,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:51,014 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:51,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:51,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 22:25:51,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:51,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208717982] [2019-11-23 22:25:51,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:25:51,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208717982] [2019-11-23 22:25:51,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394944311] [2019-11-23 22:25:51,146 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 [2019-11-23 22:25:51,467 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:25:51,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:51,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:25:51,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:25:51,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:51,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 22:25:51,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680894466] [2019-11-23 22:25:51,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:25:51,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:51,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:25:51,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:25:51,494 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 15 states. [2019-11-23 22:25:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:51,538 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2019-11-23 22:25:51,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:25:51,539 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2019-11-23 22:25:51,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:51,539 INFO L225 Difference]: With dead ends: 122 [2019-11-23 22:25:51,539 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 22:25:51,540 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:25:51,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 22:25:51,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-11-23 22:25:51,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 22:25:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2019-11-23 22:25:51,545 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 71 [2019-11-23 22:25:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:51,545 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2019-11-23 22:25:51,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:25:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2019-11-23 22:25:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 22:25:51,546 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:51,546 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:51,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:51,758 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:51,758 INFO L82 PathProgramCache]: Analyzing trace with hash 581786172, now seen corresponding path program 12 times [2019-11-23 22:25:51,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:51,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152452940] [2019-11-23 22:25:51,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:25:51,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152452940] [2019-11-23 22:25:51,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637640453] [2019-11-23 22:25:51,922 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:52,190 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:25:52,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:52,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:25:52,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-23 22:25:52,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:52,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 22:25:52,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633044553] [2019-11-23 22:25:52,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:25:52,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:52,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:25:52,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:25:52,260 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 20 states. [2019-11-23 22:25:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:52,345 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2019-11-23 22:25:52,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:25:52,345 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2019-11-23 22:25:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:52,346 INFO L225 Difference]: With dead ends: 127 [2019-11-23 22:25:52,346 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 22:25:52,347 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:25:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 22:25:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2019-11-23 22:25:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 22:25:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2019-11-23 22:25:52,351 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 73 [2019-11-23 22:25:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:52,352 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2019-11-23 22:25:52,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:25:52,352 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2019-11-23 22:25:52,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 22:25:52,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:52,353 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:52,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:52,553 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:52,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 13 times [2019-11-23 22:25:52,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:52,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341331730] [2019-11-23 22:25:52,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 22:25:52,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341331730] [2019-11-23 22:25:52,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235510726] [2019-11-23 22:25:52,728 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:52,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:25:52,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 22:25:52,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:52,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:25:52,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076956694] [2019-11-23 22:25:52,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:25:52,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:52,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:25:52,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:25:52,817 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2019-11-23 22:25:52,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:52,865 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2019-11-23 22:25:52,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:25:52,866 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2019-11-23 22:25:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:52,867 INFO L225 Difference]: With dead ends: 130 [2019-11-23 22:25:52,867 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 22:25:52,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:25:52,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 22:25:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-11-23 22:25:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 22:25:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 22:25:52,872 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2019-11-23 22:25:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:52,873 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 22:25:52,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:25:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 22:25:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:25:52,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:52,874 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:53,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:53,078 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 14 times [2019-11-23 22:25:53,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:53,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547902876] [2019-11-23 22:25:53,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 22:25:53,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547902876] [2019-11-23 22:25:53,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864905448] [2019-11-23 22:25:53,278 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:53,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:53,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:53,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:25:53,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 22:25:53,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:53,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:25:53,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670810171] [2019-11-23 22:25:53,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:25:53,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:53,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:25:53,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:25:53,381 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 18 states. [2019-11-23 22:25:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:53,438 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-23 22:25:53,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:25:53,439 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2019-11-23 22:25:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:53,440 INFO L225 Difference]: With dead ends: 132 [2019-11-23 22:25:53,440 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 22:25:53,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:25:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 22:25:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-11-23 22:25:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 22:25:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2019-11-23 22:25:53,444 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 79 [2019-11-23 22:25:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:53,444 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2019-11-23 22:25:53,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:25:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2019-11-23 22:25:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 22:25:53,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:53,445 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:53,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:53,650 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:53,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2074246028, now seen corresponding path program 15 times [2019-11-23 22:25:53,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:53,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852185440] [2019-11-23 22:25:53,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 22:25:53,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852185440] [2019-11-23 22:25:53,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088607622] [2019-11-23 22:25:53,850 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:53,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 22:25:53,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:53,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:25:53,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-23 22:25:54,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:54,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2019-11-23 22:25:54,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060314573] [2019-11-23 22:25:54,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:25:54,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:54,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:25:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:25:54,030 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 25 states. [2019-11-23 22:25:54,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:54,326 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2019-11-23 22:25:54,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:25:54,332 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2019-11-23 22:25:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:54,333 INFO L225 Difference]: With dead ends: 144 [2019-11-23 22:25:54,333 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 22:25:54,334 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:25:54,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 22:25:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2019-11-23 22:25:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 22:25:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 22:25:54,340 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 81 [2019-11-23 22:25:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:54,340 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 22:25:54,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:25:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 22:25:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 22:25:54,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:54,342 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:54,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:54,546 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:54,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 16 times [2019-11-23 22:25:54,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:54,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087717601] [2019-11-23 22:25:54,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:25:54,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087717601] [2019-11-23 22:25:54,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887450819] [2019-11-23 22:25:54,758 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:54,834 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:54,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:54,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:25:54,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-11-23 22:25:54,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:54,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2019-11-23 22:25:54,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307057604] [2019-11-23 22:25:54,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:25:54,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:54,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:25:54,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:25:54,949 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 26 states. [2019-11-23 22:25:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:55,060 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-11-23 22:25:55,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:25:55,061 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2019-11-23 22:25:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:55,062 INFO L225 Difference]: With dead ends: 153 [2019-11-23 22:25:55,062 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 22:25:55,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:25:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 22:25:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2019-11-23 22:25:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 22:25:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2019-11-23 22:25:55,068 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 91 [2019-11-23 22:25:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:55,068 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2019-11-23 22:25:55,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:25:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2019-11-23 22:25:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 22:25:55,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:55,070 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:55,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:55,270 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:55,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:55,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1149733546, now seen corresponding path program 17 times [2019-11-23 22:25:55,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:55,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453251674] [2019-11-23 22:25:55,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:25:55,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453251674] [2019-11-23 22:25:55,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961954463] [2019-11-23 22:25:55,489 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:56,043 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 22:25:56,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:56,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:25:56,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2019-11-23 22:25:56,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:56,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-11-23 22:25:56,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443865178] [2019-11-23 22:25:56,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:25:56,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:56,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:25:56,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:25:56,149 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 27 states. [2019-11-23 22:25:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:56,355 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2019-11-23 22:25:56,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:25:56,355 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 95 [2019-11-23 22:25:56,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:56,356 INFO L225 Difference]: With dead ends: 165 [2019-11-23 22:25:56,356 INFO L226 Difference]: Without dead ends: 108 [2019-11-23 22:25:56,357 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:25:56,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-23 22:25:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2019-11-23 22:25:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 22:25:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2019-11-23 22:25:56,362 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 95 [2019-11-23 22:25:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:56,363 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2019-11-23 22:25:56,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:25:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2019-11-23 22:25:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 22:25:56,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:56,364 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:56,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:56,569 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:56,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:56,570 INFO L82 PathProgramCache]: Analyzing trace with hash 668839014, now seen corresponding path program 18 times [2019-11-23 22:25:56,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:56,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881847006] [2019-11-23 22:25:56,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 22:25:56,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881847006] [2019-11-23 22:25:56,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229190059] [2019-11-23 22:25:56,863 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:57,293 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:25:57,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:57,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:25:57,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2019-11-23 22:25:57,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:57,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2019-11-23 22:25:57,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318606438] [2019-11-23 22:25:57,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:25:57,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:57,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:25:57,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:25:57,420 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 29 states. [2019-11-23 22:25:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:57,678 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2019-11-23 22:25:57,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:25:57,684 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 103 [2019-11-23 22:25:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:57,685 INFO L225 Difference]: With dead ends: 179 [2019-11-23 22:25:57,685 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 22:25:57,686 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:25:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 22:25:57,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2019-11-23 22:25:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 22:25:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 22:25:57,691 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 103 [2019-11-23 22:25:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:57,691 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 22:25:57,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:25:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 22:25:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 22:25:57,692 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:57,692 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:57,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:57,901 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:57,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1920176930, now seen corresponding path program 19 times [2019-11-23 22:25:57,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:57,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115128822] [2019-11-23 22:25:57,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 22:25:58,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115128822] [2019-11-23 22:25:58,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512142074] [2019-11-23 22:25:58,162 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:58,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:25:58,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 22:25:58,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:58,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 22:25:58,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669237316] [2019-11-23 22:25:58,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:25:58,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:58,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:25:58,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:25:58,292 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 24 states. [2019-11-23 22:25:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:58,354 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2019-11-23 22:25:58,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:25:58,356 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2019-11-23 22:25:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:58,357 INFO L225 Difference]: With dead ends: 184 [2019-11-23 22:25:58,357 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 22:25:58,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:25:58,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 22:25:58,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 22:25:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 22:25:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 22:25:58,374 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 22:25:58,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:58,374 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 22:25:58,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:25:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 22:25:58,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 22:25:58,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:58,375 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:58,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:58,579 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:58,579 INFO L82 PathProgramCache]: Analyzing trace with hash -704384544, now seen corresponding path program 20 times [2019-11-23 22:25:58,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:58,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203033300] [2019-11-23 22:25:58,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 22:25:58,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203033300] [2019-11-23 22:25:58,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121832952] [2019-11-23 22:25:58,865 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:58,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:58,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:59,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:25:59,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 22:25:59,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:59,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 22:25:59,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399008865] [2019-11-23 22:25:59,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:25:59,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:59,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:25:59,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:25:59,040 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 25 states. [2019-11-23 22:25:59,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:59,132 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 22:25:59,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:25:59,133 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2019-11-23 22:25:59,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:59,134 INFO L225 Difference]: With dead ends: 186 [2019-11-23 22:25:59,134 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 22:25:59,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:25:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 22:25:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 22:25:59,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 22:25:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 22:25:59,144 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 22:25:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:59,144 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 22:25:59,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:25:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 22:25:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 22:25:59,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:59,146 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:59,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:59,353 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:59,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:59,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1762158306, now seen corresponding path program 21 times [2019-11-23 22:25:59,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:59,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254063507] [2019-11-23 22:25:59,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 22:25:59,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254063507] [2019-11-23 22:25:59,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171190292] [2019-11-23 22:25:59,735 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:59,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 22:25:59,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:59,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:25:59,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2019-11-23 22:26:00,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:00,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-11-23 22:26:00,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263213831] [2019-11-23 22:26:00,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:26:00,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:00,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:26:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:26:00,038 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 32 states. [2019-11-23 22:26:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:00,195 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2019-11-23 22:26:00,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:26:00,197 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 115 [2019-11-23 22:26:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:00,198 INFO L225 Difference]: With dead ends: 191 [2019-11-23 22:26:00,198 INFO L226 Difference]: Without dead ends: 122 [2019-11-23 22:26:00,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:26:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-23 22:26:00,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2019-11-23 22:26:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 22:26:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2019-11-23 22:26:00,203 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 115 [2019-11-23 22:26:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:00,203 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2019-11-23 22:26:00,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:26:00,203 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2019-11-23 22:26:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 22:26:00,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:00,205 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:00,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:00,409 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:00,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:00,410 INFO L82 PathProgramCache]: Analyzing trace with hash 41685082, now seen corresponding path program 22 times [2019-11-23 22:26:00,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:00,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170213395] [2019-11-23 22:26:00,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:26:00,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170213395] [2019-11-23 22:26:00,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796875331] [2019-11-23 22:26:00,730 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:00,828 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:00,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:00,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:26:00,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:26:00,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:00,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 22:26:00,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426148844] [2019-11-23 22:26:00,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:26:00,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:00,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:26:00,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:26:00,880 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 27 states. [2019-11-23 22:26:00,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:00,980 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2019-11-23 22:26:00,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:26:00,980 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 119 [2019-11-23 22:26:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:00,981 INFO L225 Difference]: With dead ends: 194 [2019-11-23 22:26:00,981 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 22:26:00,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:26:00,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 22:26:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2019-11-23 22:26:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 22:26:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2019-11-23 22:26:00,986 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 119 [2019-11-23 22:26:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:00,987 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2019-11-23 22:26:00,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:26:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2019-11-23 22:26:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-23 22:26:00,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:00,988 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:01,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:01,192 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:01,192 INFO L82 PathProgramCache]: Analyzing trace with hash 26792216, now seen corresponding path program 23 times [2019-11-23 22:26:01,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:01,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846087594] [2019-11-23 22:26:01,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:26:01,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846087594] [2019-11-23 22:26:01,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442532354] [2019-11-23 22:26:01,583 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:03,079 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 22:26:03,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:03,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:26:03,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:26:03,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:03,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 22:26:03,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126280201] [2019-11-23 22:26:03,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:26:03,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:03,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:26:03,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:26:03,119 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 28 states. [2019-11-23 22:26:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:03,206 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2019-11-23 22:26:03,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:26:03,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 121 [2019-11-23 22:26:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:03,208 INFO L225 Difference]: With dead ends: 196 [2019-11-23 22:26:03,208 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 22:26:03,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:26:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 22:26:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-11-23 22:26:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 22:26:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2019-11-23 22:26:03,214 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2019-11-23 22:26:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:03,215 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2019-11-23 22:26:03,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:26:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2019-11-23 22:26:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 22:26:03,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:03,216 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:03,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:03,423 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1400350122, now seen corresponding path program 24 times [2019-11-23 22:26:03,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:03,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051778717] [2019-11-23 22:26:03,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:26:03,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051778717] [2019-11-23 22:26:03,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932326235] [2019-11-23 22:26:03,951 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:04,851 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 22:26:04,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:04,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:26:04,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2019-11-23 22:26:05,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:05,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 13] total 39 [2019-11-23 22:26:05,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33744724] [2019-11-23 22:26:05,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:26:05,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:05,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:26:05,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1051, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:26:05,051 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 39 states. [2019-11-23 22:26:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:06,392 INFO L93 Difference]: Finished difference Result 208 states and 220 transitions. [2019-11-23 22:26:06,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:26:06,393 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 123 [2019-11-23 22:26:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:06,394 INFO L225 Difference]: With dead ends: 208 [2019-11-23 22:26:06,394 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 22:26:06,396 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1333, Invalid=3923, Unknown=0, NotChecked=0, Total=5256 [2019-11-23 22:26:06,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 22:26:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2019-11-23 22:26:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 22:26:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 22:26:06,408 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 123 [2019-11-23 22:26:06,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:06,409 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 22:26:06,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:26:06,409 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 22:26:06,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 22:26:06,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:06,411 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:06,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:06,618 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:06,618 INFO L82 PathProgramCache]: Analyzing trace with hash 328643792, now seen corresponding path program 25 times [2019-11-23 22:26:06,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:06,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116761787] [2019-11-23 22:26:06,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:26:07,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116761787] [2019-11-23 22:26:07,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851296418] [2019-11-23 22:26:07,150 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:07,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:26:07,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:26:07,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:07,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 22:26:07,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032232922] [2019-11-23 22:26:07,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:26:07,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:07,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:26:07,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:26:07,312 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 31 states. [2019-11-23 22:26:07,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:07,399 INFO L93 Difference]: Finished difference Result 214 states and 222 transitions. [2019-11-23 22:26:07,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:26:07,400 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 133 [2019-11-23 22:26:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:07,401 INFO L225 Difference]: With dead ends: 214 [2019-11-23 22:26:07,401 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 22:26:07,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:26:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 22:26:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-11-23 22:26:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 22:26:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-11-23 22:26:07,407 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2019-11-23 22:26:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:07,408 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-11-23 22:26:07,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:26:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-11-23 22:26:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 22:26:07,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:07,409 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:07,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:07,613 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:07,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:07,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1304669938, now seen corresponding path program 26 times [2019-11-23 22:26:07,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:07,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466975607] [2019-11-23 22:26:07,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:26:08,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466975607] [2019-11-23 22:26:08,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855105332] [2019-11-23 22:26:08,222 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:08,315 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:08,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:08,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:26:08,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:26:08,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:08,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 22:26:08,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732777053] [2019-11-23 22:26:08,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:26:08,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:08,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:26:08,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:26:08,350 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 32 states. [2019-11-23 22:26:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:08,452 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2019-11-23 22:26:08,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:26:08,452 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2019-11-23 22:26:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:08,453 INFO L225 Difference]: With dead ends: 216 [2019-11-23 22:26:08,453 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 22:26:08,455 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:26:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 22:26:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-11-23 22:26:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 22:26:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 22:26:08,461 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2019-11-23 22:26:08,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:08,461 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 22:26:08,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:26:08,462 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 22:26:08,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 22:26:08,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:08,462 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:08,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:08,667 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:08,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:08,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1038865868, now seen corresponding path program 27 times [2019-11-23 22:26:08,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:08,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332904380] [2019-11-23 22:26:08,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:26:09,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332904380] [2019-11-23 22:26:09,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403654442] [2019-11-23 22:26:09,360 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:09,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:26:09,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:09,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:26:09,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1033 trivial. 0 not checked. [2019-11-23 22:26:09,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:09,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2019-11-23 22:26:09,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315693567] [2019-11-23 22:26:09,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:26:09,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:09,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:26:09,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:26:09,841 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 40 states. [2019-11-23 22:26:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:10,022 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2019-11-23 22:26:10,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:26:10,023 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2019-11-23 22:26:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:10,024 INFO L225 Difference]: With dead ends: 221 [2019-11-23 22:26:10,024 INFO L226 Difference]: Without dead ends: 144 [2019-11-23 22:26:10,025 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:26:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-23 22:26:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2019-11-23 22:26:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 22:26:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2019-11-23 22:26:10,031 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 137 [2019-11-23 22:26:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:10,031 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2019-11-23 22:26:10,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:26:10,031 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2019-11-23 22:26:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 22:26:10,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:10,032 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:10,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:10,238 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:10,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:10,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1937893128, now seen corresponding path program 28 times [2019-11-23 22:26:10,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:10,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994005640] [2019-11-23 22:26:10,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:26:10,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994005640] [2019-11-23 22:26:10,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149350540] [2019-11-23 22:26:10,842 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:10,943 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:10,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:10,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 22:26:10,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:26:10,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:10,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 22:26:10,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782695451] [2019-11-23 22:26:10,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:26:10,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:10,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:26:10,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:26:10,981 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 34 states. [2019-11-23 22:26:11,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:11,086 INFO L93 Difference]: Finished difference Result 224 states and 232 transitions. [2019-11-23 22:26:11,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:26:11,087 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 141 [2019-11-23 22:26:11,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:11,088 INFO L225 Difference]: With dead ends: 224 [2019-11-23 22:26:11,088 INFO L226 Difference]: Without dead ends: 145 [2019-11-23 22:26:11,089 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:26:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-23 22:26:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2019-11-23 22:26:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-23 22:26:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2019-11-23 22:26:11,095 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 141 [2019-11-23 22:26:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:11,095 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2019-11-23 22:26:11,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:26:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2019-11-23 22:26:11,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-23 22:26:11,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:11,096 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:11,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:11,301 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash 962487622, now seen corresponding path program 29 times [2019-11-23 22:26:11,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:11,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699189571] [2019-11-23 22:26:11,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:26:12,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699189571] [2019-11-23 22:26:12,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336993209] [2019-11-23 22:26:12,125 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:23,117 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2019-11-23 22:26:23,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:23,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:26:23,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1153 trivial. 0 not checked. [2019-11-23 22:26:23,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:23,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 11] total 43 [2019-11-23 22:26:23,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305909394] [2019-11-23 22:26:23,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:26:23,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:23,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:26:23,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=1191, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:26:23,300 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 43 states. [2019-11-23 22:26:23,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:23,570 INFO L93 Difference]: Finished difference Result 235 states and 246 transitions. [2019-11-23 22:26:23,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:26:23,571 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 143 [2019-11-23 22:26:23,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:23,572 INFO L225 Difference]: With dead ends: 235 [2019-11-23 22:26:23,572 INFO L226 Difference]: Without dead ends: 156 [2019-11-23 22:26:23,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=615, Invalid=1191, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:26:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-11-23 22:26:23,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2019-11-23 22:26:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-11-23 22:26:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2019-11-23 22:26:23,587 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 143 [2019-11-23 22:26:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:23,588 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2019-11-23 22:26:23,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:26:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2019-11-23 22:26:23,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-23 22:26:23,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:23,590 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:23,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:23,802 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:23,803 INFO L82 PathProgramCache]: Analyzing trace with hash 164858882, now seen corresponding path program 30 times [2019-11-23 22:26:23,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:23,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930486356] [2019-11-23 22:26:23,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:26:24,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930486356] [2019-11-23 22:26:24,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339107460] [2019-11-23 22:26:24,647 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:27,095 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 22:26:27,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:27,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:26:27,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2019-11-23 22:26:27,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:27,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 11] total 44 [2019-11-23 22:26:27,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438325169] [2019-11-23 22:26:27,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 22:26:27,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:27,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 22:26:27,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:26:27,279 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 44 states. [2019-11-23 22:26:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:27,512 INFO L93 Difference]: Finished difference Result 243 states and 252 transitions. [2019-11-23 22:26:27,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 22:26:27,513 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 151 [2019-11-23 22:26:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:27,514 INFO L225 Difference]: With dead ends: 243 [2019-11-23 22:26:27,514 INFO L226 Difference]: Without dead ends: 158 [2019-11-23 22:26:27,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:26:27,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-11-23 22:26:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2019-11-23 22:26:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 22:26:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 22:26:27,519 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 151 [2019-11-23 22:26:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:27,519 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 22:26:27,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 22:26:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 22:26:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 22:26:27,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:27,521 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:27,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:27,726 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:27,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1300368578, now seen corresponding path program 31 times [2019-11-23 22:26:27,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:27,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529104] [2019-11-23 22:26:27,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 22:26:28,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529104] [2019-11-23 22:26:28,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167418594] [2019-11-23 22:26:28,276 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:28,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:26:28,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 22:26:28,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:28,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 22:26:28,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239337576] [2019-11-23 22:26:28,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:26:28,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:28,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:26:28,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:26:28,411 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 37 states. [2019-11-23 22:26:28,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:28,544 INFO L93 Difference]: Finished difference Result 246 states and 254 transitions. [2019-11-23 22:26:28,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:26:28,544 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2019-11-23 22:26:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:28,545 INFO L225 Difference]: With dead ends: 246 [2019-11-23 22:26:28,545 INFO L226 Difference]: Without dead ends: 159 [2019-11-23 22:26:28,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:26:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-23 22:26:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2019-11-23 22:26:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-23 22:26:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2019-11-23 22:26:28,551 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 155 [2019-11-23 22:26:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:28,552 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2019-11-23 22:26:28,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:26:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2019-11-23 22:26:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 22:26:28,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:28,553 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:28,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:28,755 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:28,756 INFO L82 PathProgramCache]: Analyzing trace with hash -926307076, now seen corresponding path program 32 times [2019-11-23 22:26:28,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:28,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642186216] [2019-11-23 22:26:28,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 22:26:29,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642186216] [2019-11-23 22:26:29,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070479810] [2019-11-23 22:26:29,293 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:29,391 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:29,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:29,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:26:29,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 22:26:29,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:29,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 22:26:29,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784851652] [2019-11-23 22:26:29,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 22:26:29,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:29,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 22:26:29,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:26:29,426 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 38 states. [2019-11-23 22:26:29,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:29,561 INFO L93 Difference]: Finished difference Result 248 states and 256 transitions. [2019-11-23 22:26:29,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:26:29,563 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 157 [2019-11-23 22:26:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:29,564 INFO L225 Difference]: With dead ends: 248 [2019-11-23 22:26:29,564 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 22:26:29,566 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:26:29,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 22:26:29,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2019-11-23 22:26:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 22:26:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 22:26:29,572 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 157 [2019-11-23 22:26:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:29,573 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 22:26:29,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 22:26:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 22:26:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 22:26:29,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:29,574 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:29,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:29,777 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash 2064510778, now seen corresponding path program 33 times [2019-11-23 22:26:29,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:29,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916731417] [2019-11-23 22:26:29,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1549 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 22:26:30,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916731417] [2019-11-23 22:26:30,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618424619] [2019-11-23 22:26:30,351 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:30,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:26:30,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:30,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:26:30,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1549 backedges. 17 proven. 81 refuted. 0 times theorem prover too weak. 1451 trivial. 0 not checked. [2019-11-23 22:26:30,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:30,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2019-11-23 22:26:30,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284270518] [2019-11-23 22:26:30,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 22:26:30,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:30,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 22:26:30,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=1677, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:26:30,874 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 50 states. [2019-11-23 22:26:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:31,453 INFO L93 Difference]: Finished difference Result 259 states and 270 transitions. [2019-11-23 22:26:31,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-11-23 22:26:31,453 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 159 [2019-11-23 22:26:31,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:31,455 INFO L225 Difference]: With dead ends: 259 [2019-11-23 22:26:31,455 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 22:26:31,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=2637, Unknown=0, NotChecked=0, Total=3540 [2019-11-23 22:26:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 22:26:31,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2019-11-23 22:26:31,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-11-23 22:26:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2019-11-23 22:26:31,464 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 159 [2019-11-23 22:26:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:31,464 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2019-11-23 22:26:31,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 22:26:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2019-11-23 22:26:31,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-23 22:26:31,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:31,466 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:31,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:31,671 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:31,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:31,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2017112566, now seen corresponding path program 34 times [2019-11-23 22:26:31,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:31,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429755718] [2019-11-23 22:26:31,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 22:26:32,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429755718] [2019-11-23 22:26:32,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312580503] [2019-11-23 22:26:32,308 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:32,421 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:32,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:32,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:26:32,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2019-11-23 22:26:32,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:32,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2019-11-23 22:26:32,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775496912] [2019-11-23 22:26:32,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 22:26:32,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:32,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 22:26:32,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:26:32,677 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 50 states. [2019-11-23 22:26:33,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:33,138 INFO L93 Difference]: Finished difference Result 273 states and 284 transitions. [2019-11-23 22:26:33,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 22:26:33,138 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 167 [2019-11-23 22:26:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:33,139 INFO L225 Difference]: With dead ends: 273 [2019-11-23 22:26:33,140 INFO L226 Difference]: Without dead ends: 180 [2019-11-23 22:26:33,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:26:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-23 22:26:33,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2019-11-23 22:26:33,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-11-23 22:26:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2019-11-23 22:26:33,147 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 167 [2019-11-23 22:26:33,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:33,147 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2019-11-23 22:26:33,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 22:26:33,147 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2019-11-23 22:26:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-23 22:26:33,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:33,148 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:33,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:33,352 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:33,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:33,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1868006990, now seen corresponding path program 35 times [2019-11-23 22:26:33,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:33,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153544214] [2019-11-23 22:26:33,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1813 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2019-11-23 22:26:34,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153544214] [2019-11-23 22:26:34,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818275958] [2019-11-23 22:26:34,135 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:07,017 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2019-11-23 22:27:07,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:07,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:27:07,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1813 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2019-11-23 22:27:07,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:07,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 12] total 50 [2019-11-23 22:27:07,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819683197] [2019-11-23 22:27:07,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 22:27:07,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:07,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 22:27:07,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=1605, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:27:07,308 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand 50 states. [2019-11-23 22:27:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:07,576 INFO L93 Difference]: Finished difference Result 281 states and 290 transitions. [2019-11-23 22:27:07,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 22:27:07,577 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 175 [2019-11-23 22:27:07,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:07,578 INFO L225 Difference]: With dead ends: 281 [2019-11-23 22:27:07,578 INFO L226 Difference]: Without dead ends: 182 [2019-11-23 22:27:07,579 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1605, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:27:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-23 22:27:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2019-11-23 22:27:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 22:27:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2019-11-23 22:27:07,585 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 175 [2019-11-23 22:27:07,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:07,585 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2019-11-23 22:27:07,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 22:27:07,585 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2019-11-23 22:27:07,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 22:27:07,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:07,587 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:07,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:07,799 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:07,800 INFO L82 PathProgramCache]: Analyzing trace with hash -110380306, now seen corresponding path program 36 times [2019-11-23 22:27:07,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:07,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430073245] [2019-11-23 22:27:07,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 22:27:08,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430073245] [2019-11-23 22:27:08,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882035979] [2019-11-23 22:27:08,476 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:13,896 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 22:27:13,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:13,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:27:13,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1807 trivial. 0 not checked. [2019-11-23 22:27:14,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:14,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2019-11-23 22:27:14,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023196075] [2019-11-23 22:27:14,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 22:27:14,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:14,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 22:27:14,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 22:27:14,161 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 52 states. [2019-11-23 22:27:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:14,396 INFO L93 Difference]: Finished difference Result 287 states and 296 transitions. [2019-11-23 22:27:14,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 22:27:14,399 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 179 [2019-11-23 22:27:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:14,400 INFO L225 Difference]: With dead ends: 287 [2019-11-23 22:27:14,401 INFO L226 Difference]: Without dead ends: 186 [2019-11-23 22:27:14,401 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 22:27:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-11-23 22:27:14,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2019-11-23 22:27:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-11-23 22:27:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2019-11-23 22:27:14,406 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 179 [2019-11-23 22:27:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:14,406 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2019-11-23 22:27:14,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 22:27:14,406 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2019-11-23 22:27:14,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 22:27:14,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:14,407 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:14,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:14,614 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:14,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:14,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2006568490, now seen corresponding path program 37 times [2019-11-23 22:27:14,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:14,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245467392] [2019-11-23 22:27:14,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2005 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 22:27:15,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245467392] [2019-11-23 22:27:15,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976114519] [2019-11-23 22:27:15,401 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:15,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 22:27:15,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2005 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 22:27:15,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:15,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 22:27:15,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683775154] [2019-11-23 22:27:15,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:27:15,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:15,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:27:15,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:27:15,571 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 43 states. [2019-11-23 22:27:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:15,722 INFO L93 Difference]: Finished difference Result 290 states and 298 transitions. [2019-11-23 22:27:15,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:27:15,722 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 183 [2019-11-23 22:27:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:15,723 INFO L225 Difference]: With dead ends: 290 [2019-11-23 22:27:15,723 INFO L226 Difference]: Without dead ends: 187 [2019-11-23 22:27:15,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:27:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-23 22:27:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2019-11-23 22:27:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 22:27:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2019-11-23 22:27:15,730 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2019-11-23 22:27:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:15,730 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2019-11-23 22:27:15,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:27:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2019-11-23 22:27:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-23 22:27:15,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:15,731 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:15,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:15,935 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:15,936 INFO L82 PathProgramCache]: Analyzing trace with hash -456024344, now seen corresponding path program 38 times [2019-11-23 22:27:15,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:15,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866591958] [2019-11-23 22:27:15,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 22:27:16,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866591958] [2019-11-23 22:27:16,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583637011] [2019-11-23 22:27:16,670 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:16,788 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:16,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:16,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 22:27:16,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 22:27:16,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:16,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-11-23 22:27:16,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016189605] [2019-11-23 22:27:16,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 22:27:16,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:16,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 22:27:16,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:27:16,845 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 44 states. [2019-11-23 22:27:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:17,010 INFO L93 Difference]: Finished difference Result 292 states and 300 transitions. [2019-11-23 22:27:17,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:27:17,010 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 185 [2019-11-23 22:27:17,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:17,011 INFO L225 Difference]: With dead ends: 292 [2019-11-23 22:27:17,011 INFO L226 Difference]: Without dead ends: 189 [2019-11-23 22:27:17,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:27:17,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-23 22:27:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2019-11-23 22:27:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 22:27:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2019-11-23 22:27:17,018 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 185 [2019-11-23 22:27:17,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:17,018 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2019-11-23 22:27:17,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 22:27:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2019-11-23 22:27:17,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 22:27:17,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:17,020 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:17,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:17,223 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:17,224 INFO L82 PathProgramCache]: Analyzing trace with hash -480757722, now seen corresponding path program 39 times [2019-11-23 22:27:17,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:17,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447091335] [2019-11-23 22:27:17,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2165 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 22:27:17,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447091335] [2019-11-23 22:27:17,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011462398] [2019-11-23 22:27:17,963 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:18,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 22:27:18,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:18,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:27:18,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2165 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2044 trivial. 0 not checked. [2019-11-23 22:27:18,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:18,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 14] total 56 [2019-11-23 22:27:18,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830039726] [2019-11-23 22:27:18,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 22:27:18,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:18,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 22:27:18,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1036, Invalid=2044, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:27:18,493 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 56 states. [2019-11-23 22:27:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:18,962 INFO L93 Difference]: Finished difference Result 303 states and 314 transitions. [2019-11-23 22:27:18,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 22:27:18,962 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 187 [2019-11-23 22:27:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:18,964 INFO L225 Difference]: With dead ends: 303 [2019-11-23 22:27:18,964 INFO L226 Difference]: Without dead ends: 200 [2019-11-23 22:27:18,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1036, Invalid=2044, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:27:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-11-23 22:27:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 196. [2019-11-23 22:27:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 22:27:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2019-11-23 22:27:18,970 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 187 [2019-11-23 22:27:18,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:18,971 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2019-11-23 22:27:18,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 22:27:18,971 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2019-11-23 22:27:18,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-23 22:27:18,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:18,972 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:19,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:19,177 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:19,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:19,177 INFO L82 PathProgramCache]: Analyzing trace with hash 693661410, now seen corresponding path program 40 times [2019-11-23 22:27:19,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:19,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477806970] [2019-11-23 22:27:19,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2317 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 22:27:20,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477806970] [2019-11-23 22:27:20,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513822082] [2019-11-23 22:27:20,439 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:20,622 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:20,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:20,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:27:20,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2317 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2196 trivial. 0 not checked. [2019-11-23 22:27:21,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:21,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 14] total 57 [2019-11-23 22:27:21,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422389126] [2019-11-23 22:27:21,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 22:27:21,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:21,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 22:27:21,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=2112, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:27:21,114 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand 57 states. [2019-11-23 22:27:21,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:21,382 INFO L93 Difference]: Finished difference Result 311 states and 320 transitions. [2019-11-23 22:27:21,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-23 22:27:21,382 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 195 [2019-11-23 22:27:21,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:21,384 INFO L225 Difference]: With dead ends: 311 [2019-11-23 22:27:21,384 INFO L226 Difference]: Without dead ends: 202 [2019-11-23 22:27:21,384 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1080, Invalid=2112, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:27:21,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-23 22:27:21,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-11-23 22:27:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-23 22:27:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2019-11-23 22:27:21,391 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 195 [2019-11-23 22:27:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:21,391 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2019-11-23 22:27:21,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-23 22:27:21,391 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2019-11-23 22:27:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 22:27:21,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:21,393 INFO L410 BasicCegarLoop]: trace histogram [43, 43, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]