/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/eca-rers2012/Problem18_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:24:26,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:24:26,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:24:26,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:24:26,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:24:26,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:24:26,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:24:26,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:24:26,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:24:26,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:24:26,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:24:26,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 21:24:26,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:24:26,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:24:26,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:24:26,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:24:26,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:24:26,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:24:26,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:24:26,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:24:26,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:24:26,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:24:26,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:24:26,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:24:26,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 21:24:26,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 21:24:26,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 21:24:26,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 21:24:26,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 21:24:26,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 21:24:26,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 21:24:26,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 21:24:26,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 21:24:26,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 21:24:26,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 21:24:26,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 21:24:26,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 21:24:26,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 21:24:26,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 21:24:26,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 21:24:26,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 21:24:26,586 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 21:24:26,600 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:24:26,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:24:26,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:24:26,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:24:26,602 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:24:26,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:24:26,602 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:24:26,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:24:26,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:24:26,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:24:26,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:24:26,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:24:26,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:24:26,603 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:24:26,604 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:24:26,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:24:26,604 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:24:26,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:24:26,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:24:26,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:24:26,605 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:24:26,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:24:26,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:24:26,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:24:26,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:24:26,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:24:26,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:24:26,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:24:26,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:24:26,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:24:26,897 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:24:26,919 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:24:26,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:24:26,926 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:24:26,927 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:24:26,928 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-11-23 21:24:27,001 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54e30caa8/519655e0d2144cf994a6cfa1d0e21e15/FLAG45f2646f9 [2019-11-23 21:24:27,717 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:24:27,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-11-23 21:24:27,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54e30caa8/519655e0d2144cf994a6cfa1d0e21e15/FLAG45f2646f9 [2019-11-23 21:24:27,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54e30caa8/519655e0d2144cf994a6cfa1d0e21e15 [2019-11-23 21:24:27,825 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:24:27,827 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:24:27,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:24:27,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:24:27,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:24:27,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:27" (1/1) ... [2019-11-23 21:24:27,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a08c9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:27, skipping insertion in model container [2019-11-23 21:24:27,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:27" (1/1) ... [2019-11-23 21:24:27,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:24:27,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:24:29,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:24:29,167 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:24:29,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:24:29,646 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:24:29,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:29 WrapperNode [2019-11-23 21:24:29,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:24:29,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:24:29,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:24:29,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:24:29,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:29" (1/1) ... [2019-11-23 21:24:29,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:29" (1/1) ... [2019-11-23 21:24:29,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:24:29,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:24:29,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:24:29,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:24:29,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:29" (1/1) ... [2019-11-23 21:24:29,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:29" (1/1) ... [2019-11-23 21:24:29,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:29" (1/1) ... [2019-11-23 21:24:29,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:29" (1/1) ... [2019-11-23 21:24:30,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:29" (1/1) ... [2019-11-23 21:24:30,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:29" (1/1) ... [2019-11-23 21:24:30,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:29" (1/1) ... [2019-11-23 21:24:30,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:24:30,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:24:30,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:24:30,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:24:30,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:29" (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 21:24:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:24:30,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:24:34,476 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:24:34,476 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:24:34,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:34 BoogieIcfgContainer [2019-11-23 21:24:34,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:24:34,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:24:34,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:24:34,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:24:34,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:24:27" (1/3) ... [2019-11-23 21:24:34,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70343dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:34, skipping insertion in model container [2019-11-23 21:24:34,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:29" (2/3) ... [2019-11-23 21:24:34,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70343dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:34, skipping insertion in model container [2019-11-23 21:24:34,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:34" (3/3) ... [2019-11-23 21:24:34,488 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label50.c [2019-11-23 21:24:34,498 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:24:34,507 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:24:34,522 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:24:34,580 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:24:34,581 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:24:34,581 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:24:34,581 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:24:34,581 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:24:34,582 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:24:34,582 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:24:34,582 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:24:34,620 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:24:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 21:24:34,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:34,633 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, 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 21:24:34,633 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:34,640 INFO L82 PathProgramCache]: Analyzing trace with hash -696204111, now seen corresponding path program 1 times [2019-11-23 21:24:34,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:34,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026180738] [2019-11-23 21:24:34,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:24:34,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026180738] [2019-11-23 21:24:34,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:34,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:24:34,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366198225] [2019-11-23 21:24:34,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:34,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:34,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:34,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:34,974 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:24:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:42,445 INFO L93 Difference]: Finished difference Result 2914 states and 5662 transitions. [2019-11-23 21:24:42,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:42,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-11-23 21:24:42,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:42,504 INFO L225 Difference]: With dead ends: 2914 [2019-11-23 21:24:42,505 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:24:42,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:42,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:24:42,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:24:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:24:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3262 transitions. [2019-11-23 21:24:42,685 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3262 transitions. Word has length 63 [2019-11-23 21:24:42,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:42,686 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3262 transitions. [2019-11-23 21:24:42,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:42,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3262 transitions. [2019-11-23 21:24:42,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-23 21:24:42,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:42,697 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:24:42,698 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:42,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:42,699 INFO L82 PathProgramCache]: Analyzing trace with hash 928891202, now seen corresponding path program 1 times [2019-11-23 21:24:42,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:42,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593424311] [2019-11-23 21:24:42,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:24:42,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593424311] [2019-11-23 21:24:42,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:42,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:24:42,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657205457] [2019-11-23 21:24:42,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:42,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:42,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:42,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:42,934 INFO L87 Difference]: Start difference. First operand 2074 states and 3262 transitions. Second operand 4 states. [2019-11-23 21:24:47,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:47,592 INFO L93 Difference]: Finished difference Result 6216 states and 9781 transitions. [2019-11-23 21:24:47,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:47,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2019-11-23 21:24:47,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:47,622 INFO L225 Difference]: With dead ends: 6216 [2019-11-23 21:24:47,622 INFO L226 Difference]: Without dead ends: 4144 [2019-11-23 21:24:47,628 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:47,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2019-11-23 21:24:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2019-11-23 21:24:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4144 states. [2019-11-23 21:24:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5537 transitions. [2019-11-23 21:24:47,767 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5537 transitions. Word has length 128 [2019-11-23 21:24:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:47,771 INFO L462 AbstractCegarLoop]: Abstraction has 4144 states and 5537 transitions. [2019-11-23 21:24:47,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:47,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5537 transitions. [2019-11-23 21:24:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-11-23 21:24:47,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:47,789 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 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 21:24:47,789 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1882009590, now seen corresponding path program 1 times [2019-11-23 21:24:47,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:47,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108243223] [2019-11-23 21:24:47,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-11-23 21:24:48,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108243223] [2019-11-23 21:24:48,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:48,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:48,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125963385] [2019-11-23 21:24:48,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:24:48,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:48,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:24:48,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:24:48,366 INFO L87 Difference]: Start difference. First operand 4144 states and 5537 transitions. Second operand 5 states. [2019-11-23 21:24:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:54,397 INFO L93 Difference]: Finished difference Result 13806 states and 18082 transitions. [2019-11-23 21:24:54,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:54,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 246 [2019-11-23 21:24:54,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:54,442 INFO L225 Difference]: With dead ends: 13806 [2019-11-23 21:24:54,443 INFO L226 Difference]: Without dead ends: 9664 [2019-11-23 21:24:54,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2019-11-23 21:24:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 8974. [2019-11-23 21:24:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8974 states. [2019-11-23 21:24:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10715 transitions. [2019-11-23 21:24:54,606 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10715 transitions. Word has length 246 [2019-11-23 21:24:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:54,607 INFO L462 AbstractCegarLoop]: Abstraction has 8974 states and 10715 transitions. [2019-11-23 21:24:54,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:24:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10715 transitions. [2019-11-23 21:24:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2019-11-23 21:24:54,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:54,618 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:24:54,618 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:54,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1545280562, now seen corresponding path program 1 times [2019-11-23 21:24:54,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:54,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893153955] [2019-11-23 21:24:54,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 340 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-23 21:24:55,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893153955] [2019-11-23 21:24:55,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38540664] [2019-11-23 21:24:55,188 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 21:24:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:55,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:55,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:24:55,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:55,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:55,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061324904] [2019-11-23 21:24:55,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:55,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:55,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:55,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:55,596 INFO L87 Difference]: Start difference. First operand 8974 states and 10715 transitions. Second operand 3 states. [2019-11-23 21:24:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:59,468 INFO L93 Difference]: Finished difference Result 22086 states and 27009 transitions. [2019-11-23 21:24:59,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:59,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 428 [2019-11-23 21:24:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:59,534 INFO L225 Difference]: With dead ends: 22086 [2019-11-23 21:24:59,534 INFO L226 Difference]: Without dead ends: 13114 [2019-11-23 21:24:59,545 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 427 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13114 states. [2019-11-23 21:24:59,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13114 to 13114. [2019-11-23 21:24:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13114 states. [2019-11-23 21:24:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13114 states to 13114 states and 15840 transitions. [2019-11-23 21:24:59,736 INFO L78 Accepts]: Start accepts. Automaton has 13114 states and 15840 transitions. Word has length 428 [2019-11-23 21:24:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:59,738 INFO L462 AbstractCegarLoop]: Abstraction has 13114 states and 15840 transitions. [2019-11-23 21:24:59,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 13114 states and 15840 transitions. [2019-11-23 21:24:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2019-11-23 21:24:59,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:59,750 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:24:59,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:59,954 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:59,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:59,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1627173231, now seen corresponding path program 1 times [2019-11-23 21:24:59,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:59,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65899464] [2019-11-23 21:24:59,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 21:25:00,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65899464] [2019-11-23 21:25:00,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:00,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:00,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436324657] [2019-11-23 21:25:00,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:00,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:00,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:00,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:00,343 INFO L87 Difference]: Start difference. First operand 13114 states and 15840 transitions. Second operand 4 states. [2019-11-23 21:25:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:06,759 INFO L93 Difference]: Finished difference Result 44166 states and 54394 transitions. [2019-11-23 21:25:06,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:06,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 434 [2019-11-23 21:25:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:06,826 INFO L225 Difference]: With dead ends: 44166 [2019-11-23 21:25:06,826 INFO L226 Difference]: Without dead ends: 31054 [2019-11-23 21:25:06,844 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31054 states. [2019-11-23 21:25:07,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31054 to 30364. [2019-11-23 21:25:07,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30364 states. [2019-11-23 21:25:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30364 states to 30364 states and 36096 transitions. [2019-11-23 21:25:07,255 INFO L78 Accepts]: Start accepts. Automaton has 30364 states and 36096 transitions. Word has length 434 [2019-11-23 21:25:07,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:07,259 INFO L462 AbstractCegarLoop]: Abstraction has 30364 states and 36096 transitions. [2019-11-23 21:25:07,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 30364 states and 36096 transitions. [2019-11-23 21:25:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2019-11-23 21:25:07,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:07,287 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1] [2019-11-23 21:25:07,287 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:07,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:07,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1345895718, now seen corresponding path program 1 times [2019-11-23 21:25:07,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:07,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402906244] [2019-11-23 21:25:07,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 460 proven. 3 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-11-23 21:25:08,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402906244] [2019-11-23 21:25:08,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926122752] [2019-11-23 21:25:08,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:09,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:25:09,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:25:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 423 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2019-11-23 21:25:09,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:25:09,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:25:09,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601749574] [2019-11-23 21:25:09,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:09,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:09,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:09,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:25:09,439 INFO L87 Difference]: Start difference. First operand 30364 states and 36096 transitions. Second operand 3 states. [2019-11-23 21:25:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:12,653 INFO L93 Difference]: Finished difference Result 60036 states and 71488 transitions. [2019-11-23 21:25:12,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:12,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 596 [2019-11-23 21:25:12,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:12,699 INFO L225 Difference]: With dead ends: 60036 [2019-11-23 21:25:12,700 INFO L226 Difference]: Without dead ends: 30364 [2019-11-23 21:25:12,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 595 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:25:12,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30364 states. [2019-11-23 21:25:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30364 to 30364. [2019-11-23 21:25:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30364 states. [2019-11-23 21:25:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30364 states to 30364 states and 34972 transitions. [2019-11-23 21:25:13,103 INFO L78 Accepts]: Start accepts. Automaton has 30364 states and 34972 transitions. Word has length 596 [2019-11-23 21:25:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:13,104 INFO L462 AbstractCegarLoop]: Abstraction has 30364 states and 34972 transitions. [2019-11-23 21:25:13,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:13,105 INFO L276 IsEmpty]: Start isEmpty. Operand 30364 states and 34972 transitions. [2019-11-23 21:25:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2019-11-23 21:25:13,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:13,142 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1] [2019-11-23 21:25:13,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:13,347 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:13,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:13,347 INFO L82 PathProgramCache]: Analyzing trace with hash 249620716, now seen corresponding path program 1 times [2019-11-23 21:25:13,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:13,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598860836] [2019-11-23 21:25:13,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 457 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-23 21:25:14,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598860836] [2019-11-23 21:25:14,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275918996] [2019-11-23 21:25:14,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:14,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:25:14,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:25:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-11-23 21:25:14,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:25:14,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:25:14,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243440151] [2019-11-23 21:25:14,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:14,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:14,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:14,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:25:14,640 INFO L87 Difference]: Start difference. First operand 30364 states and 34972 transitions. Second operand 3 states. [2019-11-23 21:25:18,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:18,383 INFO L93 Difference]: Finished difference Result 75216 states and 87889 transitions. [2019-11-23 21:25:18,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:18,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 759 [2019-11-23 21:25:18,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:18,418 INFO L225 Difference]: With dead ends: 75216 [2019-11-23 21:25:18,418 INFO L226 Difference]: Without dead ends: 39334 [2019-11-23 21:25:18,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 758 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:25:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39334 states. [2019-11-23 21:25:18,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39334 to 38644. [2019-11-23 21:25:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38644 states. [2019-11-23 21:25:18,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38644 states to 38644 states and 41412 transitions. [2019-11-23 21:25:18,879 INFO L78 Accepts]: Start accepts. Automaton has 38644 states and 41412 transitions. Word has length 759 [2019-11-23 21:25:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:18,880 INFO L462 AbstractCegarLoop]: Abstraction has 38644 states and 41412 transitions. [2019-11-23 21:25:18,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 38644 states and 41412 transitions. [2019-11-23 21:25:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2019-11-23 21:25:18,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:18,908 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:25:19,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:19,111 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:19,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1209590713, now seen corresponding path program 1 times [2019-11-23 21:25:19,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:19,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103883915] [2019-11-23 21:25:19,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2019-11-23 21:25:19,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103883915] [2019-11-23 21:25:19,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:19,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:25:19,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419732878] [2019-11-23 21:25:19,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:19,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:19,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:25:19,991 INFO L87 Difference]: Start difference. First operand 38644 states and 41412 transitions. Second operand 3 states. [2019-11-23 21:25:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:23,081 INFO L93 Difference]: Finished difference Result 86256 states and 93051 transitions. [2019-11-23 21:25:23,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:23,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 853 [2019-11-23 21:25:23,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:23,140 INFO L225 Difference]: With dead ends: 86256 [2019-11-23 21:25:23,140 INFO L226 Difference]: Without dead ends: 48304 [2019-11-23 21:25:23,162 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 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 21:25:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48304 states. [2019-11-23 21:25:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48304 to 46234. [2019-11-23 21:25:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46234 states. [2019-11-23 21:25:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46234 states to 46234 states and 49962 transitions. [2019-11-23 21:25:23,648 INFO L78 Accepts]: Start accepts. Automaton has 46234 states and 49962 transitions. Word has length 853 [2019-11-23 21:25:23,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:23,650 INFO L462 AbstractCegarLoop]: Abstraction has 46234 states and 49962 transitions. [2019-11-23 21:25:23,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 46234 states and 49962 transitions. [2019-11-23 21:25:23,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1008 [2019-11-23 21:25:23,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:23,690 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:25:23,690 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:23,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:23,690 INFO L82 PathProgramCache]: Analyzing trace with hash -967816584, now seen corresponding path program 1 times [2019-11-23 21:25:23,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:23,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208601007] [2019-11-23 21:25:23,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 967 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-11-23 21:25:24,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208601007] [2019-11-23 21:25:24,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:24,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:24,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135972234] [2019-11-23 21:25:24,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:24,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:24,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:24,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:24,540 INFO L87 Difference]: Start difference. First operand 46234 states and 49962 transitions. Second operand 4 states. [2019-11-23 21:25:29,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:29,135 INFO L93 Difference]: Finished difference Result 109026 states and 119151 transitions. [2019-11-23 21:25:29,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:29,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1007 [2019-11-23 21:25:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:29,206 INFO L225 Difference]: With dead ends: 109026 [2019-11-23 21:25:29,206 INFO L226 Difference]: Without dead ends: 63484 [2019-11-23 21:25:29,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:29,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63484 states. [2019-11-23 21:25:29,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63484 to 57964. [2019-11-23 21:25:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57964 states. [2019-11-23 21:25:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57964 states to 57964 states and 61769 transitions. [2019-11-23 21:25:29,688 INFO L78 Accepts]: Start accepts. Automaton has 57964 states and 61769 transitions. Word has length 1007 [2019-11-23 21:25:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:29,689 INFO L462 AbstractCegarLoop]: Abstraction has 57964 states and 61769 transitions. [2019-11-23 21:25:29,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:29,689 INFO L276 IsEmpty]: Start isEmpty. Operand 57964 states and 61769 transitions. [2019-11-23 21:25:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1153 [2019-11-23 21:25:29,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:29,733 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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 21:25:29,734 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:29,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:29,734 INFO L82 PathProgramCache]: Analyzing trace with hash -67915541, now seen corresponding path program 1 times [2019-11-23 21:25:29,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:29,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046156099] [2019-11-23 21:25:29,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 1282 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2019-11-23 21:25:30,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046156099] [2019-11-23 21:25:30,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:30,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:30,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784443528] [2019-11-23 21:25:30,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:30,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:30,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:30,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:30,869 INFO L87 Difference]: Start difference. First operand 57964 states and 61769 transitions. Second operand 4 states. [2019-11-23 21:25:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:36,470 INFO L93 Difference]: Finished difference Result 145596 states and 155548 transitions. [2019-11-23 21:25:36,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:36,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1152 [2019-11-23 21:25:36,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:36,549 INFO L225 Difference]: With dead ends: 145596 [2019-11-23 21:25:36,549 INFO L226 Difference]: Without dead ends: 88324 [2019-11-23 21:25:36,579 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88324 states. [2019-11-23 21:25:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88324 to 84874. [2019-11-23 21:25:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84874 states. [2019-11-23 21:25:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84874 states to 84874 states and 89866 transitions. [2019-11-23 21:25:37,231 INFO L78 Accepts]: Start accepts. Automaton has 84874 states and 89866 transitions. Word has length 1152 [2019-11-23 21:25:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:37,232 INFO L462 AbstractCegarLoop]: Abstraction has 84874 states and 89866 transitions. [2019-11-23 21:25:37,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 84874 states and 89866 transitions. [2019-11-23 21:25:37,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1179 [2019-11-23 21:25:37,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:37,271 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:25:37,272 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:37,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1608460695, now seen corresponding path program 1 times [2019-11-23 21:25:37,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:37,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591804634] [2019-11-23 21:25:37,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1622 backedges. 1183 proven. 0 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2019-11-23 21:25:38,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591804634] [2019-11-23 21:25:38,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:38,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:38,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676581856] [2019-11-23 21:25:38,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:38,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:38,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:38,383 INFO L87 Difference]: Start difference. First operand 84874 states and 89866 transitions. Second operand 4 states. [2019-11-23 21:25:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:43,382 INFO L93 Difference]: Finished difference Result 173196 states and 183425 transitions. [2019-11-23 21:25:43,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:43,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1178 [2019-11-23 21:25:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:43,455 INFO L225 Difference]: With dead ends: 173196 [2019-11-23 21:25:43,455 INFO L226 Difference]: Without dead ends: 89014 [2019-11-23 21:25:43,479 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89014 states. [2019-11-23 21:25:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89014 to 88324. [2019-11-23 21:25:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88324 states. [2019-11-23 21:25:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88324 states to 88324 states and 92378 transitions. [2019-11-23 21:25:44,075 INFO L78 Accepts]: Start accepts. Automaton has 88324 states and 92378 transitions. Word has length 1178 [2019-11-23 21:25:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:44,075 INFO L462 AbstractCegarLoop]: Abstraction has 88324 states and 92378 transitions. [2019-11-23 21:25:44,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 88324 states and 92378 transitions. [2019-11-23 21:25:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1740 [2019-11-23 21:25:44,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:44,120 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:25:44,120 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:44,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:44,121 INFO L82 PathProgramCache]: Analyzing trace with hash -83228612, now seen corresponding path program 1 times [2019-11-23 21:25:44,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:44,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619848173] [2019-11-23 21:25:44,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat