/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/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:57:07,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:57:07,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:57:07,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:57:07,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:57:07,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:57:07,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:57:07,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:57:07,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:57:07,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:57:07,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:57:07,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:57:07,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:57:07,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:57:07,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:57:07,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:57:07,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:57:07,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:57:07,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:57:07,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:57:07,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:57:07,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:57:07,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:57:07,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:57:07,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:57:07,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:57:07,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:57:07,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:57:07,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:57:07,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 06:57:07,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:57:07,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:57:07,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:57:07,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:57:07,687 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:57:07,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:57:07,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:57:07,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:57:07,690 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:57:07,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:57:07,691 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:57:07,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:57:07,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:57:07,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:57:07,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:57:07,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:57:07,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:57:07,694 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:57:07,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:57:07,694 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:57:07,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:57:07,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:57:07,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:57:07,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:57:07,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:57:07,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:57:07,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:57:07,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:57:07,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:57:07,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:57:07,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:57:07,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:57:07,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:57:07,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:57:07,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:57:08,005 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:57:08,010 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:57:08,012 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:57:08,013 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:57:08,013 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-08-19 06:57:08,086 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d0913a1c/1896f4a0fb22419d96a9369e04002483/FLAG45bd1f341 [2020-08-19 06:57:08,585 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:57:08,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-08-19 06:57:08,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d0913a1c/1896f4a0fb22419d96a9369e04002483/FLAG45bd1f341 [2020-08-19 06:57:08,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d0913a1c/1896f4a0fb22419d96a9369e04002483 [2020-08-19 06:57:08,930 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:57:08,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:57:08,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:57:08,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:57:08,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:57:08,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:57:08" (1/1) ... [2020-08-19 06:57:08,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c4453c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:57:08, skipping insertion in model container [2020-08-19 06:57:08,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:57:08" (1/1) ... [2020-08-19 06:57:08,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:57:08,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:57:09,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:57:09,260 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:57:09,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:57:09,515 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:57:09,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:57:09 WrapperNode [2020-08-19 06:57:09,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:57:09,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:57:09,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:57:09,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:57:09,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:57:09" (1/1) ... [2020-08-19 06:57:09,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:57:09" (1/1) ... [2020-08-19 06:57:09,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:57:09" (1/1) ... [2020-08-19 06:57:09,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:57:09" (1/1) ... [2020-08-19 06:57:09,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:57:09" (1/1) ... [2020-08-19 06:57:09,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:57:09" (1/1) ... [2020-08-19 06:57:09,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:57:09" (1/1) ... [2020-08-19 06:57:09,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:57:09,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:57:09,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:57:09,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:57:09,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:57:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-19 06:57:09,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:57:09,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:57:09,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:57:09,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:57:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-19 06:57:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-19 06:57:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:57:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 06:57:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 06:57:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 06:57:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 06:57:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-19 06:57:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 06:57:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:57:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:57:09,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 06:57:09,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 06:57:12,465 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:57:12,468 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 06:57:12,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:57:12 BoogieIcfgContainer [2020-08-19 06:57:12,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:57:12,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:57:12,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:57:12,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:57:12,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:57:08" (1/3) ... [2020-08-19 06:57:12,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254a373a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:57:12, skipping insertion in model container [2020-08-19 06:57:12,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:57:09" (2/3) ... [2020-08-19 06:57:12,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254a373a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:57:12, skipping insertion in model container [2020-08-19 06:57:12,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:57:12" (3/3) ... [2020-08-19 06:57:12,488 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2020-08-19 06:57:12,499 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:57:12,509 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:57:12,524 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:57:12,549 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:57:12,550 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:57:12,550 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:57:12,550 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:57:12,551 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:57:12,551 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:57:12,551 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:57:12,551 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:57:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-19 06:57:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-19 06:57:12,577 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:12,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:12,578 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1960518123, now seen corresponding path program 1 times [2020-08-19 06:57:12,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:12,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188671000] [2020-08-19 06:57:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:57:12,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188671000] [2020-08-19 06:57:12,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:57:12,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:57:12,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760086824] [2020-08-19 06:57:12,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:57:12,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:13,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:57:13,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:57:13,016 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-08-19 06:57:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:15,235 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-08-19 06:57:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:57:15,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-19 06:57:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:15,248 INFO L225 Difference]: With dead ends: 38 [2020-08-19 06:57:15,248 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 06:57:15,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:57:15,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 06:57:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-08-19 06:57:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 06:57:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-08-19 06:57:15,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-08-19 06:57:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:15,293 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-08-19 06:57:15,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:57:15,294 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-08-19 06:57:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 06:57:15,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:15,295 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:15,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:57:15,295 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:15,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1182240945, now seen corresponding path program 1 times [2020-08-19 06:57:15,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:15,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988860890] [2020-08-19 06:57:15,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:15,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:57:15,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988860890] [2020-08-19 06:57:15,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:15,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:57:15,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614405833] [2020-08-19 06:57:15,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:57:15,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:15,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:57:15,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:57:15,556 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-08-19 06:57:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:19,770 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-08-19 06:57:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:57:19,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-19 06:57:19,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:19,772 INFO L225 Difference]: With dead ends: 29 [2020-08-19 06:57:19,772 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 06:57:19,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:57:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 06:57:19,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-08-19 06:57:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-19 06:57:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-08-19 06:57:19,781 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-08-19 06:57:19,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:19,781 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-08-19 06:57:19,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:57:19,782 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-08-19 06:57:19,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:57:19,782 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:19,783 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:19,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:57:19,783 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:19,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:19,784 INFO L82 PathProgramCache]: Analyzing trace with hash 491744683, now seen corresponding path program 2 times [2020-08-19 06:57:19,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:19,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440499927] [2020-08-19 06:57:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:19,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:57:20,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440499927] [2020-08-19 06:57:20,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:20,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:57:20,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086003981] [2020-08-19 06:57:20,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:57:20,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:57:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:57:20,006 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-08-19 06:57:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:26,296 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-08-19 06:57:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:57:26,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-19 06:57:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:26,298 INFO L225 Difference]: With dead ends: 34 [2020-08-19 06:57:26,298 INFO L226 Difference]: Without dead ends: 31 [2020-08-19 06:57:26,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:57:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-19 06:57:26,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-19 06:57:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-19 06:57:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-08-19 06:57:26,313 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-08-19 06:57:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:26,313 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-08-19 06:57:26,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:57:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-08-19 06:57:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:57:26,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:26,316 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:26,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:57:26,316 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:26,318 INFO L82 PathProgramCache]: Analyzing trace with hash 161258737, now seen corresponding path program 3 times [2020-08-19 06:57:26,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:26,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472423814] [2020-08-19 06:57:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:26,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:57:26,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472423814] [2020-08-19 06:57:26,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:26,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:57:26,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196428990] [2020-08-19 06:57:26,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:57:26,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:26,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:57:26,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:57:26,590 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 8 states. [2020-08-19 06:57:34,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:34,931 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-08-19 06:57:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:57:34,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-19 06:57:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:34,932 INFO L225 Difference]: With dead ends: 39 [2020-08-19 06:57:34,933 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 06:57:34,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:57:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 06:57:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-08-19 06:57:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 06:57:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-08-19 06:57:34,946 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-08-19 06:57:34,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:34,946 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-08-19 06:57:34,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:57:34,946 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-08-19 06:57:34,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 06:57:34,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:34,948 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:34,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:57:34,948 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:34,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1890060651, now seen corresponding path program 4 times [2020-08-19 06:57:34,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:34,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367883424] [2020-08-19 06:57:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:35,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:57:35,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367883424] [2020-08-19 06:57:35,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:35,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:57:35,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692253793] [2020-08-19 06:57:35,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:57:35,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:57:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:57:35,202 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 9 states. [2020-08-19 06:57:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:45,573 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-08-19 06:57:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:57:45,574 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-08-19 06:57:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:45,575 INFO L225 Difference]: With dead ends: 44 [2020-08-19 06:57:45,575 INFO L226 Difference]: Without dead ends: 41 [2020-08-19 06:57:45,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:57:45,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-19 06:57:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-08-19 06:57:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-19 06:57:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-08-19 06:57:45,589 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-08-19 06:57:45,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:45,591 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-08-19 06:57:45,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:57:45,591 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-08-19 06:57:45,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 06:57:45,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:45,593 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:45,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:57:45,593 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:45,594 INFO L82 PathProgramCache]: Analyzing trace with hash -737191631, now seen corresponding path program 5 times [2020-08-19 06:57:45,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:45,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134713607] [2020-08-19 06:57:45,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:45,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:57:45,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134713607] [2020-08-19 06:57:45,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:45,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:57:45,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276953019] [2020-08-19 06:57:45,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:57:45,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:45,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:57:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:57:45,866 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 10 states. [2020-08-19 06:57:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:57:58,307 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-08-19 06:57:58,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:57:58,308 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-19 06:57:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:57:58,309 INFO L225 Difference]: With dead ends: 49 [2020-08-19 06:57:58,309 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 06:57:58,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:57:58,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 06:57:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-08-19 06:57:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 06:57:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-08-19 06:57:58,328 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-08-19 06:57:58,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:57:58,332 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-08-19 06:57:58,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:57:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-08-19 06:57:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 06:57:58,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:57:58,334 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:57:58,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:57:58,334 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:57:58,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:57:58,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1715407573, now seen corresponding path program 6 times [2020-08-19 06:57:58,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:57:58,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283194927] [2020-08-19 06:57:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:57:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:58,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:57:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:57:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:57:58,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283194927] [2020-08-19 06:57:58,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:57:58,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:57:58,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514862137] [2020-08-19 06:57:58,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:57:58,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:57:58,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:57:58,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:57:58,631 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 11 states. [2020-08-19 06:58:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:13,215 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-08-19 06:58:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:58:13,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-08-19 06:58:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:13,216 INFO L225 Difference]: With dead ends: 54 [2020-08-19 06:58:13,217 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 06:58:13,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:58:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 06:58:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-08-19 06:58:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 06:58:13,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-08-19 06:58:13,234 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-08-19 06:58:13,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:13,234 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-08-19 06:58:13,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:58:13,235 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-08-19 06:58:13,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-19 06:58:13,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:13,237 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:58:13,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:58:13,239 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:13,240 INFO L82 PathProgramCache]: Analyzing trace with hash -462174863, now seen corresponding path program 7 times [2020-08-19 06:58:13,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:13,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875679277] [2020-08-19 06:58:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:13,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:58:13,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875679277] [2020-08-19 06:58:13,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:58:13,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:58:13,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508251846] [2020-08-19 06:58:13,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:58:13,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:13,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:58:13,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:58:13,540 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 12 states.