/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/array-examples/standard_copy6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:23:49,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:23:49,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:23:49,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:23:49,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:23:49,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:23:49,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:23:49,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:23:49,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:23:49,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:23:49,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:23:49,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:23:49,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:23:49,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:23:49,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:23:49,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:23:49,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:23:49,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:23:49,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:23:49,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:23:49,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:23:49,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:23:49,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:23:49,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:23:49,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:23:49,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:23:49,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:23:49,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:23:49,986 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 20:23:50,012 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:23:50,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:23:50,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:23:50,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:23:50,014 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:23:50,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:23:50,015 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:23:50,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:23:50,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:23:50,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:23:50,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:23:50,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:23:50,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:23:50,016 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:23:50,016 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:23:50,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:23:50,017 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:23:50,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:23:50,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:23:50,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:23:50,017 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:23:50,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:23:50,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:23:50,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:23:50,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:23:50,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:23:50,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:23:50,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:23:50,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:23:50,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:23:50,308 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:23:50,321 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:23:50,325 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:23:50,326 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:23:50,327 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:23:50,328 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2019-11-23 20:23:50,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c3161555/24441fde8d9c47c888df319decbd36ae/FLAGe4dfd9fbc [2019-11-23 20:23:50,842 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:23:50,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2019-11-23 20:23:50,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c3161555/24441fde8d9c47c888df319decbd36ae/FLAGe4dfd9fbc [2019-11-23 20:23:51,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c3161555/24441fde8d9c47c888df319decbd36ae [2019-11-23 20:23:51,246 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:23:51,248 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:23:51,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:23:51,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:23:51,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:23:51,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:23:51" (1/1) ... [2019-11-23 20:23:51,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@127afcab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51, skipping insertion in model container [2019-11-23 20:23:51,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:23:51" (1/1) ... [2019-11-23 20:23:51,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:23:51,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:23:51,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:23:51,510 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:23:51,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:23:51,557 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:23:51,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51 WrapperNode [2019-11-23 20:23:51,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:23:51,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:23:51,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:23:51,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:23:51,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51" (1/1) ... [2019-11-23 20:23:51,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51" (1/1) ... [2019-11-23 20:23:51,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:23:51,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:23:51,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:23:51,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:23:51,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51" (1/1) ... [2019-11-23 20:23:51,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51" (1/1) ... [2019-11-23 20:23:51,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51" (1/1) ... [2019-11-23 20:23:51,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51" (1/1) ... [2019-11-23 20:23:51,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51" (1/1) ... [2019-11-23 20:23:51,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51" (1/1) ... [2019-11-23 20:23:51,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51" (1/1) ... [2019-11-23 20:23:51,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:23:51,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:23:51,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:23:51,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:23:51,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51" (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 20:23:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:23:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:23:51,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:23:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:23:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:23:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:23:52,189 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:23:52,189 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-23 20:23:52,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:23:52 BoogieIcfgContainer [2019-11-23 20:23:52,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:23:52,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:23:52,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:23:52,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:23:52,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:23:51" (1/3) ... [2019-11-23 20:23:52,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b99a268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:23:52, skipping insertion in model container [2019-11-23 20:23:52,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:51" (2/3) ... [2019-11-23 20:23:52,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b99a268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:23:52, skipping insertion in model container [2019-11-23 20:23:52,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:23:52" (3/3) ... [2019-11-23 20:23:52,200 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2019-11-23 20:23:52,213 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:23:52,220 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:23:52,232 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:23:52,257 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:23:52,257 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:23:52,257 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:23:52,257 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:23:52,257 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:23:52,258 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:23:52,258 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:23:52,258 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:23:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-23 20:23:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:23:52,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:52,281 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 20:23:52,282 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:52,289 INFO L82 PathProgramCache]: Analyzing trace with hash -962610817, now seen corresponding path program 1 times [2019-11-23 20:23:52,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:52,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856790382] [2019-11-23 20:23:52,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:52,480 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 20:23:52,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856790382] [2019-11-23 20:23:52,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:23:52,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:23:52,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428660017] [2019-11-23 20:23:52,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:23:52,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:52,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:23:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:23:52,502 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-11-23 20:23:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:52,557 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2019-11-23 20:23:52,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:23:52,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:23:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:52,572 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:23:52,573 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:23:52,581 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 20:23:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:23:52,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:23:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:23:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-11-23 20:23:52,656 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2019-11-23 20:23:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:52,657 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-11-23 20:23:52,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:23:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-11-23 20:23:52,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:23:52,660 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:52,662 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] [2019-11-23 20:23:52,664 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1385693007, now seen corresponding path program 1 times [2019-11-23 20:23:52,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:52,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627890543] [2019-11-23 20:23:52,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:52,778 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 20:23:52,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627890543] [2019-11-23 20:23:52,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:23:52,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:23:52,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490542681] [2019-11-23 20:23:52,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:23:52,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:52,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:23:52,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:23:52,784 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2019-11-23 20:23:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:52,921 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2019-11-23 20:23:52,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:23:52,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-23 20:23:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:52,923 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:23:52,924 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:23:52,926 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 20:23:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:23:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2019-11-23 20:23:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:23:52,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-11-23 20:23:52,942 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 21 [2019-11-23 20:23:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:52,943 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-11-23 20:23:52,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:23:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-11-23 20:23:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:23:52,947 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:52,948 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:23:52,948 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:52,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:52,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1933824923, now seen corresponding path program 1 times [2019-11-23 20:23:52,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:52,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477265138] [2019-11-23 20:23:52,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:23:53,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477265138] [2019-11-23 20:23:53,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264977278] [2019-11-23 20:23:53,090 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 20:23:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:53,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:23:53,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:23:53,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:53,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:23:53,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184875179] [2019-11-23 20:23:53,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:23:53,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:53,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:23:53,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:23:53,253 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 5 states. [2019-11-23 20:23:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:53,300 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2019-11-23 20:23:53,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:23:53,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2019-11-23 20:23:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:53,302 INFO L225 Difference]: With dead ends: 70 [2019-11-23 20:23:53,302 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:23:53,305 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 20:23:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:23:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-23 20:23:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:23:53,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-11-23 20:23:53,318 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 33 [2019-11-23 20:23:53,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:53,319 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-11-23 20:23:53,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:23:53,319 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-11-23 20:23:53,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:23:53,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:53,321 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, 1, 1, 1, 1, 1, 1] [2019-11-23 20:23:53,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:53,527 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:53,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2053832611, now seen corresponding path program 2 times [2019-11-23 20:23:53,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:53,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628795968] [2019-11-23 20:23:53,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:23:53,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628795968] [2019-11-23 20:23:53,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488783053] [2019-11-23 20:23:53,649 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 20:23:53,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:23:53,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:53,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:23:53,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:23:53,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:53,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:23:53,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424189922] [2019-11-23 20:23:53,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:23:53,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:53,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:23:53,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:23:53,761 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 6 states. [2019-11-23 20:23:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:53,791 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2019-11-23 20:23:53,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:23:53,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-11-23 20:23:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:53,793 INFO L225 Difference]: With dead ends: 72 [2019-11-23 20:23:53,793 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:23:53,793 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:23:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:23:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-23 20:23:53,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:23:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-11-23 20:23:53,800 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 35 [2019-11-23 20:23:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:53,800 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-11-23 20:23:53,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:23:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-11-23 20:23:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:23:53,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:53,802 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:23:54,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:54,006 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:54,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:54,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1213072543, now seen corresponding path program 3 times [2019-11-23 20:23:54,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:54,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791169853] [2019-11-23 20:23:54,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:23:54,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791169853] [2019-11-23 20:23:54,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295573129] [2019-11-23 20:23:54,115 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 20:23:54,192 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:23:54,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:54,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:23:54,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:23:54,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:54,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:23:54,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999955076] [2019-11-23 20:23:54,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:23:54,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:54,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:23:54,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:23:54,234 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 8 states. [2019-11-23 20:23:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:54,434 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2019-11-23 20:23:54,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:23:54,437 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2019-11-23 20:23:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:54,438 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:23:54,438 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:23:54,439 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 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 20:23:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:23:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2019-11-23 20:23:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:23:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-11-23 20:23:54,454 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 37 [2019-11-23 20:23:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:54,455 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-11-23 20:23:54,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:23:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-11-23 20:23:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:23:54,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:54,457 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 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, 1, 1] [2019-11-23 20:23:54,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:54,663 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:54,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:54,664 INFO L82 PathProgramCache]: Analyzing trace with hash 322242131, now seen corresponding path program 4 times [2019-11-23 20:23:54,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:54,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974521132] [2019-11-23 20:23:54,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:23:54,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974521132] [2019-11-23 20:23:54,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446640474] [2019-11-23 20:23:54,781 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 20:23:54,856 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:23:54,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:54,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:23:54,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:23:54,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:54,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:23:54,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31831588] [2019-11-23 20:23:54,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:23:54,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:54,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:23:54,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:23:54,895 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 8 states. [2019-11-23 20:23:54,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:54,942 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2019-11-23 20:23:54,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:23:54,942 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-11-23 20:23:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:54,943 INFO L225 Difference]: With dead ends: 100 [2019-11-23 20:23:54,944 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:23:54,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:23:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:23:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2019-11-23 20:23:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:23:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2019-11-23 20:23:54,962 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 51 [2019-11-23 20:23:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:54,964 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2019-11-23 20:23:54,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:23:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2019-11-23 20:23:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:23:54,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:54,968 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 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, 1, 1] [2019-11-23 20:23:55,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:55,183 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:55,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:55,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1865991697, now seen corresponding path program 5 times [2019-11-23 20:23:55,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:55,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582471502] [2019-11-23 20:23:55,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:23:55,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582471502] [2019-11-23 20:23:55,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368379029] [2019-11-23 20:23:55,342 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 20:23:56,413 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:23:56,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:56,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:23:56,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:23:56,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:56,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 20:23:56,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651544149] [2019-11-23 20:23:56,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:23:56,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:56,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:23:56,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:23:56,465 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 11 states. [2019-11-23 20:23:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:56,677 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2019-11-23 20:23:56,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:23:56,678 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2019-11-23 20:23:56,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:56,679 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:23:56,679 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:23:56,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:23:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:23:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2019-11-23 20:23:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:23:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2019-11-23 20:23:56,688 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 53 [2019-11-23 20:23:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:56,688 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2019-11-23 20:23:56,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:23:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2019-11-23 20:23:56,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:23:56,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:56,690 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:23:56,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:56,900 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:56,901 INFO L82 PathProgramCache]: Analyzing trace with hash 631233795, now seen corresponding path program 6 times [2019-11-23 20:23:56,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:56,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632855504] [2019-11-23 20:23:56,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-23 20:23:57,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632855504] [2019-11-23 20:23:57,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278317032] [2019-11-23 20:23:57,012 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 20:23:57,615 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:23:57,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:57,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:23:57,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:23:57,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:57,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-23 20:23:57,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902268736] [2019-11-23 20:23:57,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:23:57,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:57,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:23:57,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:23:57,683 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 13 states. [2019-11-23 20:23:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:57,909 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2019-11-23 20:23:57,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:23:57,910 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2019-11-23 20:23:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:57,911 INFO L225 Difference]: With dead ends: 146 [2019-11-23 20:23:57,911 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:23:57,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:23:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:23:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2019-11-23 20:23:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:23:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2019-11-23 20:23:57,919 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 67 [2019-11-23 20:23:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:57,920 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2019-11-23 20:23:57,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:23:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2019-11-23 20:23:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:23:57,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:57,922 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 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, 1, 1] [2019-11-23 20:23:58,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:58,134 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:58,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:58,135 INFO L82 PathProgramCache]: Analyzing trace with hash -266902411, now seen corresponding path program 7 times [2019-11-23 20:23:58,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:58,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510583854] [2019-11-23 20:23:58,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 20:23:58,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510583854] [2019-11-23 20:23:58,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186923585] [2019-11-23 20:23:58,261 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 20:23:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:58,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:23:58,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 20:23:58,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:58,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:23:58,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236665924] [2019-11-23 20:23:58,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:23:58,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:58,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:23:58,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:23:58,383 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 11 states. [2019-11-23 20:23:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:58,422 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2019-11-23 20:23:58,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:23:58,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2019-11-23 20:23:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:58,424 INFO L225 Difference]: With dead ends: 154 [2019-11-23 20:23:58,424 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:23:58,425 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 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 20:23:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:23:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:23:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:23:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2019-11-23 20:23:58,431 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 81 [2019-11-23 20:23:58,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:58,432 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2019-11-23 20:23:58,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:23:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2019-11-23 20:23:58,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:23:58,433 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:58,434 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 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, 1, 1] [2019-11-23 20:23:58,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:58,638 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:58,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:58,638 INFO L82 PathProgramCache]: Analyzing trace with hash -687373389, now seen corresponding path program 8 times [2019-11-23 20:23:58,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:58,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645015057] [2019-11-23 20:23:58,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 20:23:58,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645015057] [2019-11-23 20:23:58,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255599353] [2019-11-23 20:23:58,744 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 20:23:58,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:23:58,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:58,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:23:58,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 20:23:58,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:58,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:23:58,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897495600] [2019-11-23 20:23:58,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:23:58,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:58,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:23:58,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:23:58,841 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 12 states. [2019-11-23 20:23:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:58,885 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2019-11-23 20:23:58,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:23:58,886 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2019-11-23 20:23:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:58,887 INFO L225 Difference]: With dead ends: 156 [2019-11-23 20:23:58,887 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:23:58,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 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 20:23:58,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:23:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:23:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:23:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2019-11-23 20:23:58,894 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 83 [2019-11-23 20:23:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:58,895 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2019-11-23 20:23:58,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:23:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2019-11-23 20:23:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:23:58,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:58,896 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 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, 1, 1] [2019-11-23 20:23:59,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:59,100 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1033057423, now seen corresponding path program 9 times [2019-11-23 20:23:59,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:59,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876637464] [2019-11-23 20:23:59,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 20:23:59,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876637464] [2019-11-23 20:23:59,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136598776] [2019-11-23 20:23:59,244 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 20:24:00,103 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:24:00,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:00,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:24:00,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2019-11-23 20:24:00,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:00,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2019-11-23 20:24:00,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060984427] [2019-11-23 20:24:00,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:24:00,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:00,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:24:00,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:24:00,205 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 17 states. [2019-11-23 20:24:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:00,569 INFO L93 Difference]: Finished difference Result 176 states and 196 transitions. [2019-11-23 20:24:00,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:24:00,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2019-11-23 20:24:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:00,571 INFO L225 Difference]: With dead ends: 176 [2019-11-23 20:24:00,571 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 20:24:00,571 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:24:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 20:24:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2019-11-23 20:24:00,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 20:24:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2019-11-23 20:24:00,577 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 85 [2019-11-23 20:24:00,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:00,578 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2019-11-23 20:24:00,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:24:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2019-11-23 20:24:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:24:00,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:00,579 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 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, 1, 1] [2019-11-23 20:24:00,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:00,797 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:00,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:00,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1606941283, now seen corresponding path program 10 times [2019-11-23 20:24:00,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:00,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190499964] [2019-11-23 20:24:00,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-11-23 20:24:00,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190499964] [2019-11-23 20:24:00,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839114604] [2019-11-23 20:24:00,950 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 20:24:01,072 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:24:01,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:01,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:24:01,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-11-23 20:24:01,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:01,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:24:01,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185742852] [2019-11-23 20:24:01,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:24:01,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:01,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:24:01,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:24:01,150 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 14 states. [2019-11-23 20:24:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:01,223 INFO L93 Difference]: Finished difference Result 184 states and 198 transitions. [2019-11-23 20:24:01,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:24:01,224 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2019-11-23 20:24:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:01,227 INFO L225 Difference]: With dead ends: 184 [2019-11-23 20:24:01,227 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 20:24:01,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 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 20:24:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 20:24:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-11-23 20:24:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:24:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2019-11-23 20:24:01,244 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 99 [2019-11-23 20:24:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:01,244 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2019-11-23 20:24:01,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:24:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2019-11-23 20:24:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 20:24:01,246 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:01,247 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 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, 1, 1] [2019-11-23 20:24:01,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:01,452 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:01,452 INFO L82 PathProgramCache]: Analyzing trace with hash -606992863, now seen corresponding path program 11 times [2019-11-23 20:24:01,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:01,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980402335] [2019-11-23 20:24:01,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-11-23 20:24:01,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980402335] [2019-11-23 20:24:01,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961446737] [2019-11-23 20:24:01,661 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