/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:05:41,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:05:41,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:05:41,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:05:41,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:05:41,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:05:41,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:05:41,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:05:41,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:05:41,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:05:41,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:05:41,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:05:41,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:05:41,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:05:41,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:05:41,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:05:41,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:05:41,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:05:41,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:05:41,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:05:41,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:05:41,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:05:41,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:05:41,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:05:41,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:05:41,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:05:41,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:05:41,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:05:41,678 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 [2020-08-21 15:05:41,719 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:05:41,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:05:41,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:05:41,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:05:41,721 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:05:41,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:05:41,722 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:05:41,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:05:41,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:05:41,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:05:41,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:05:41,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:05:41,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:05:41,724 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:05:41,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:05:41,724 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:05:41,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:05:41,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:05:41,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:05:41,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:05:41,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:05:41,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:05:41,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:05:41,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:05:41,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:05:41,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:05:41,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:05:41,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:05:41,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:05:41,727 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:05:42,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:05:42,037 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:05:42,040 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:05:42,042 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:05:42,042 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:05:42,043 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-21 15:05:42,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6893def8/5d9053213c9f4206b72be6da8d571eaa/FLAG6c81ef315 [2020-08-21 15:05:42,711 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:05:42,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-21 15:05:42,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6893def8/5d9053213c9f4206b72be6da8d571eaa/FLAG6c81ef315 [2020-08-21 15:05:42,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6893def8/5d9053213c9f4206b72be6da8d571eaa [2020-08-21 15:05:42,977 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:05:42,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:05:42,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:05:42,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:05:42,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:05:42,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:05:42" (1/1) ... [2020-08-21 15:05:42,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf2a9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:42, skipping insertion in model container [2020-08-21 15:05:42,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:05:42" (1/1) ... [2020-08-21 15:05:42,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:05:43,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:05:43,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:05:43,681 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:05:44,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:05:44,239 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:05:44,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44 WrapperNode [2020-08-21 15:05:44,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:05:44,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:05:44,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:05:44,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:05:44,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:44,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:44,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:44,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:44,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:44,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:44,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (1/1) ... [2020-08-21 15:05:44,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:05:44,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:05:44,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:05:44,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:05:44,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (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 [2020-08-21 15:05:44,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:05:44,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:05:44,464 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 15:05:44,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:05:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:05:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 15:05:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 15:05:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 15:05:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 15:05:44,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 15:05:44,468 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 15:05:44,468 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 15:05:44,469 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 15:05:44,469 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 15:05:44,469 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 15:05:44,470 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 15:05:44,470 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 15:05:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:05:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:05:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:05:46,005 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:05:46,006 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 15:05:46,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:05:46 BoogieIcfgContainer [2020-08-21 15:05:46,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:05:46,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:05:46,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:05:46,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:05:46,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:05:42" (1/3) ... [2020-08-21 15:05:46,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a849347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:05:46, skipping insertion in model container [2020-08-21 15:05:46,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:44" (2/3) ... [2020-08-21 15:05:46,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a849347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:05:46, skipping insertion in model container [2020-08-21 15:05:46,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:05:46" (3/3) ... [2020-08-21 15:05:46,022 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-21 15:05:46,033 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:05:46,066 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-08-21 15:05:46,080 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-08-21 15:05:46,105 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:05:46,105 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:05:46,106 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:05:46,106 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:05:46,106 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:05:46,106 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:05:46,106 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:05:46,106 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:05:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states. [2020-08-21 15:05:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 15:05:46,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:46,151 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:46,152 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:46,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:46,157 INFO L82 PathProgramCache]: Analyzing trace with hash 604537660, now seen corresponding path program 1 times [2020-08-21 15:05:46,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:46,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991406791] [2020-08-21 15:05:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:47,091 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:05:47,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:47,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991406791] [2020-08-21 15:05:47,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:47,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:05:47,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585686475] [2020-08-21 15:05:47,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:05:47,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:47,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:05:47,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:05:47,229 INFO L87 Difference]: Start difference. First operand 412 states. Second operand 4 states. [2020-08-21 15:05:47,561 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-21 15:05:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:50,343 INFO L93 Difference]: Finished difference Result 754 states and 1320 transitions. [2020-08-21 15:05:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:05:50,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-21 15:05:50,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:50,382 INFO L225 Difference]: With dead ends: 754 [2020-08-21 15:05:50,382 INFO L226 Difference]: Without dead ends: 593 [2020-08-21 15:05:50,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:05:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-08-21 15:05:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2020-08-21 15:05:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-21 15:05:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 870 transitions. [2020-08-21 15:05:50,492 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 870 transitions. Word has length 146 [2020-08-21 15:05:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:50,495 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 870 transitions. [2020-08-21 15:05:50,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:05:50,496 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 870 transitions. [2020-08-21 15:05:50,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 15:05:50,509 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:50,509 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:50,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:05:50,511 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:50,511 INFO L82 PathProgramCache]: Analyzing trace with hash 694944860, now seen corresponding path program 1 times [2020-08-21 15:05:50,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:50,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542512410] [2020-08-21 15:05:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:51,187 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:05:51,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:51,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542512410] [2020-08-21 15:05:51,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:51,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:05:51,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246980192] [2020-08-21 15:05:51,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:05:51,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:51,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:05:51,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:05:51,284 INFO L87 Difference]: Start difference. First operand 591 states and 870 transitions. Second operand 4 states. [2020-08-21 15:05:51,574 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-21 15:05:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:53,822 INFO L93 Difference]: Finished difference Result 1190 states and 1805 transitions. [2020-08-21 15:05:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:05:53,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-21 15:05:53,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:53,830 INFO L225 Difference]: With dead ends: 1190 [2020-08-21 15:05:53,830 INFO L226 Difference]: Without dead ends: 961 [2020-08-21 15:05:53,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:05:53,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-08-21 15:05:53,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2020-08-21 15:05:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-08-21 15:05:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1434 transitions. [2020-08-21 15:05:53,887 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1434 transitions. Word has length 146 [2020-08-21 15:05:53,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:53,888 INFO L479 AbstractCegarLoop]: Abstraction has 959 states and 1434 transitions. [2020-08-21 15:05:53,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:05:53,888 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1434 transitions. [2020-08-21 15:05:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 15:05:53,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:53,892 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:53,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:05:53,893 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:53,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1369993092, now seen corresponding path program 1 times [2020-08-21 15:05:53,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:53,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295928790] [2020-08-21 15:05:53,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:54,417 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:05:54,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:54,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295928790] [2020-08-21 15:05:54,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:54,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:05:54,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149538549] [2020-08-21 15:05:54,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:05:54,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:54,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:05:54,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:05:54,464 INFO L87 Difference]: Start difference. First operand 959 states and 1434 transitions. Second operand 4 states. [2020-08-21 15:05:54,772 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-21 15:05:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:57,357 INFO L93 Difference]: Finished difference Result 2090 states and 3210 transitions. [2020-08-21 15:05:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:05:57,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-21 15:05:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:57,375 INFO L225 Difference]: With dead ends: 2090 [2020-08-21 15:05:57,375 INFO L226 Difference]: Without dead ends: 1701 [2020-08-21 15:05:57,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:05:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2020-08-21 15:05:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2020-08-21 15:05:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-08-21 15:05:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2566 transitions. [2020-08-21 15:05:57,483 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2566 transitions. Word has length 146 [2020-08-21 15:05:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:57,484 INFO L479 AbstractCegarLoop]: Abstraction has 1699 states and 2566 transitions. [2020-08-21 15:05:57,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:05:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2566 transitions. [2020-08-21 15:05:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 15:05:57,488 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:57,489 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:57,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:05:57,490 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:57,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1370331716, now seen corresponding path program 1 times [2020-08-21 15:05:57,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:57,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739116086] [2020-08-21 15:05:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:58,060 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:05:58,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:58,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739116086] [2020-08-21 15:05:58,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:58,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:05:58,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650575639] [2020-08-21 15:05:58,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:05:58,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:58,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:05:58,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:05:58,115 INFO L87 Difference]: Start difference. First operand 1699 states and 2566 transitions. Second operand 5 states. [2020-08-21 15:06:01,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:06:01,706 INFO L93 Difference]: Finished difference Result 4967 states and 7485 transitions. [2020-08-21 15:06:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:06:01,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-21 15:06:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:06:01,724 INFO L225 Difference]: With dead ends: 4967 [2020-08-21 15:06:01,724 INFO L226 Difference]: Without dead ends: 3281 [2020-08-21 15:06:01,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:06:01,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2020-08-21 15:06:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 3235. [2020-08-21 15:06:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2020-08-21 15:06:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 4851 transitions. [2020-08-21 15:06:01,858 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 4851 transitions. Word has length 146 [2020-08-21 15:06:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:06:01,859 INFO L479 AbstractCegarLoop]: Abstraction has 3235 states and 4851 transitions. [2020-08-21 15:06:01,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:06:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 4851 transitions. [2020-08-21 15:06:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-21 15:06:01,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:06:01,865 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:06:01,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:06:01,868 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:06:01,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:06:01,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1648495204, now seen corresponding path program 1 times [2020-08-21 15:06:01,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:06:01,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317397429] [2020-08-21 15:06:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:06:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:02,172 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:06:02,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:06:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:06:02,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317397429] [2020-08-21 15:06:02,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:06:02,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:06:02,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328577085] [2020-08-21 15:06:02,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:06:02,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:06:02,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:06:02,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:06:02,212 INFO L87 Difference]: Start difference. First operand 3235 states and 4851 transitions. Second operand 4 states. [2020-08-21 15:06:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:06:04,734 INFO L93 Difference]: Finished difference Result 9659 states and 14483 transitions. [2020-08-21 15:06:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:06:04,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-08-21 15:06:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:06:04,768 INFO L225 Difference]: With dead ends: 9659 [2020-08-21 15:06:04,769 INFO L226 Difference]: Without dead ends: 6456 [2020-08-21 15:06:04,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:06:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2020-08-21 15:06:04,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 3237. [2020-08-21 15:06:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3237 states. [2020-08-21 15:06:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4853 transitions. [2020-08-21 15:06:04,956 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4853 transitions. Word has length 147 [2020-08-21 15:06:04,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:06:04,957 INFO L479 AbstractCegarLoop]: Abstraction has 3237 states and 4853 transitions. [2020-08-21 15:06:04,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:06:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4853 transitions. [2020-08-21 15:06:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-21 15:06:04,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:06:04,963 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:06:04,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:06:04,963 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:06:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:06:04,964 INFO L82 PathProgramCache]: Analyzing trace with hash 921116989, now seen corresponding path program 1 times [2020-08-21 15:06:04,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:06:04,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921956802] [2020-08-21 15:06:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:06:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:05,535 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:06:05,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:06:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:06:05,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921956802] [2020-08-21 15:06:05,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:06:05,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:06:05,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641582863] [2020-08-21 15:06:05,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:06:05,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:06:05,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:06:05,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:06:05,593 INFO L87 Difference]: Start difference. First operand 3237 states and 4853 transitions. Second operand 5 states. [2020-08-21 15:06:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:06:08,682 INFO L93 Difference]: Finished difference Result 9441 states and 14115 transitions. [2020-08-21 15:06:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:06:08,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-08-21 15:06:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:06:08,711 INFO L225 Difference]: With dead ends: 9441 [2020-08-21 15:06:08,711 INFO L226 Difference]: Without dead ends: 6238 [2020-08-21 15:06:08,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:06:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2020-08-21 15:06:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 6192. [2020-08-21 15:06:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6192 states. [2020-08-21 15:06:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 9193 transitions. [2020-08-21 15:06:08,964 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 9193 transitions. Word has length 148 [2020-08-21 15:06:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:06:08,965 INFO L479 AbstractCegarLoop]: Abstraction has 6192 states and 9193 transitions. [2020-08-21 15:06:08,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:06:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 9193 transitions. [2020-08-21 15:06:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-21 15:06:08,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:06:08,974 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:06:08,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:06:08,975 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:06:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:06:08,975 INFO L82 PathProgramCache]: Analyzing trace with hash 239618117, now seen corresponding path program 1 times [2020-08-21 15:06:08,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:06:08,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590887731] [2020-08-21 15:06:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:06:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:09,301 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:06:09,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:06:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:06:09,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590887731] [2020-08-21 15:06:09,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:06:09,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:06:09,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97873666] [2020-08-21 15:06:09,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:06:09,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:06:09,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:06:09,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:06:09,395 INFO L87 Difference]: Start difference. First operand 6192 states and 9193 transitions. Second operand 4 states. [2020-08-21 15:06:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:06:12,927 INFO L93 Difference]: Finished difference Result 18492 states and 27451 transitions. [2020-08-21 15:06:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:06:12,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-08-21 15:06:12,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:06:12,973 INFO L225 Difference]: With dead ends: 18492 [2020-08-21 15:06:12,973 INFO L226 Difference]: Without dead ends: 12348 [2020-08-21 15:06:12,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:06:12,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12348 states. [2020-08-21 15:06:13,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12348 to 6196. [2020-08-21 15:06:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6196 states. [2020-08-21 15:06:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 9197 transitions. [2020-08-21 15:06:13,311 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 9197 transitions. Word has length 149 [2020-08-21 15:06:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:06:13,312 INFO L479 AbstractCegarLoop]: Abstraction has 6196 states and 9197 transitions. [2020-08-21 15:06:13,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:06:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 9197 transitions. [2020-08-21 15:06:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 15:06:13,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:06:13,323 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:06:13,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:06:13,323 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:06:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:06:13,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1772203169, now seen corresponding path program 1 times [2020-08-21 15:06:13,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:06:13,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525049927] [2020-08-21 15:06:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:06:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:13,744 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:06:13,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:06:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:06:13,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525049927] [2020-08-21 15:06:13,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:06:13,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:06:13,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342165918] [2020-08-21 15:06:13,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:06:13,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:06:13,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:06:13,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:06:13,807 INFO L87 Difference]: Start difference. First operand 6196 states and 9197 transitions. Second operand 4 states. [2020-08-21 15:06:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:06:17,321 INFO L93 Difference]: Finished difference Result 16495 states and 24448 transitions. [2020-08-21 15:06:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:06:17,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-08-21 15:06:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:06:17,345 INFO L225 Difference]: With dead ends: 16495 [2020-08-21 15:06:17,345 INFO L226 Difference]: Without dead ends: 10615 [2020-08-21 15:06:17,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:06:17,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2020-08-21 15:06:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10569. [2020-08-21 15:06:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-21 15:06:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15484 transitions. [2020-08-21 15:06:17,777 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15484 transitions. Word has length 150 [2020-08-21 15:06:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:06:17,777 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15484 transitions. [2020-08-21 15:06:17,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:06:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15484 transitions. [2020-08-21 15:06:17,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 15:06:17,792 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:06:17,793 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:06:17,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:06:17,793 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:06:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:06:17,794 INFO L82 PathProgramCache]: Analyzing trace with hash 251552574, now seen corresponding path program 1 times [2020-08-21 15:06:17,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:06:17,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229861345] [2020-08-21 15:06:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:06:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:18,282 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:06:18,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:06:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:06:18,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229861345] [2020-08-21 15:06:18,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:06:18,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:06:18,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188027844] [2020-08-21 15:06:18,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:06:18,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:06:18,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:06:18,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:06:18,318 INFO L87 Difference]: Start difference. First operand 10569 states and 15484 transitions. Second operand 5 states. [2020-08-21 15:06:20,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:06:20,821 INFO L93 Difference]: Finished difference Result 21564 states and 31467 transitions. [2020-08-21 15:06:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:06:20,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-21 15:06:20,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:06:20,844 INFO L225 Difference]: With dead ends: 21564 [2020-08-21 15:06:20,844 INFO L226 Difference]: Without dead ends: 10851 [2020-08-21 15:06:20,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:06:20,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-21 15:06:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10805. [2020-08-21 15:06:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10805 states. [2020-08-21 15:06:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10805 states to 10805 states and 15660 transitions. [2020-08-21 15:06:21,335 INFO L78 Accepts]: Start accepts. Automaton has 10805 states and 15660 transitions. Word has length 150 [2020-08-21 15:06:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:06:21,335 INFO L479 AbstractCegarLoop]: Abstraction has 10805 states and 15660 transitions. [2020-08-21 15:06:21,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:06:21,335 INFO L276 IsEmpty]: Start isEmpty. Operand 10805 states and 15660 transitions. [2020-08-21 15:06:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 15:06:21,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:06:21,347 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:06:21,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:06:21,348 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:06:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:06:21,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1535594178, now seen corresponding path program 1 times [2020-08-21 15:06:21,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:06:21,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013123391] [2020-08-21 15:06:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:06:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:21,725 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:06:21,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:06:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:06:21,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013123391] [2020-08-21 15:06:21,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:06:21,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:06:21,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263004318] [2020-08-21 15:06:21,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:06:21,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:06:21,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:06:21,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:06:21,782 INFO L87 Difference]: Start difference. First operand 10805 states and 15660 transitions. Second operand 5 states. [2020-08-21 15:06:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:06:25,122 INFO L93 Difference]: Finished difference Result 15230 states and 22013 transitions. [2020-08-21 15:06:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:06:25,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-21 15:06:25,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:06:25,144 INFO L225 Difference]: With dead ends: 15230 [2020-08-21 15:06:25,144 INFO L226 Difference]: Without dead ends: 10851 [2020-08-21 15:06:25,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:06:25,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-21 15:06:25,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10569. [2020-08-21 15:06:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-21 15:06:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15362 transitions. [2020-08-21 15:06:25,721 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15362 transitions. Word has length 150 [2020-08-21 15:06:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:06:25,721 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15362 transitions. [2020-08-21 15:06:25,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:06:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15362 transitions. [2020-08-21 15:06:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 15:06:25,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:06:25,730 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:06:25,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:06:25,731 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:06:25,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:06:25,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1232731994, now seen corresponding path program 1 times [2020-08-21 15:06:25,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:06:25,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823799368] [2020-08-21 15:06:25,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:06:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:26,047 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:06:26,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:06:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:06:26,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823799368] [2020-08-21 15:06:26,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:06:26,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:06:26,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836172546] [2020-08-21 15:06:26,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:06:26,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:06:26,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:06:26,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:06:26,082 INFO L87 Difference]: Start difference. First operand 10569 states and 15362 transitions. Second operand 4 states. [2020-08-21 15:06:29,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:06:29,956 INFO L93 Difference]: Finished difference Result 25409 states and 36872 transitions. [2020-08-21 15:06:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:06:29,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-08-21 15:06:29,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:06:29,992 INFO L225 Difference]: With dead ends: 25409 [2020-08-21 15:06:29,992 INFO L226 Difference]: Without dead ends: 21030 [2020-08-21 15:06:30,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:06:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21030 states. [2020-08-21 15:06:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21030 to 10577. [2020-08-21 15:06:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10577 states. [2020-08-21 15:06:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 15370 transitions. [2020-08-21 15:06:31,183 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 15370 transitions. Word has length 151 [2020-08-21 15:06:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:06:31,183 INFO L479 AbstractCegarLoop]: Abstraction has 10577 states and 15370 transitions. [2020-08-21 15:06:31,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:06:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 15370 transitions. [2020-08-21 15:06:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-21 15:06:31,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:06:31,192 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:06:31,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:06:31,192 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:06:31,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:06:31,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1234425885, now seen corresponding path program 1 times [2020-08-21 15:06:31,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:06:31,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822320475] [2020-08-21 15:06:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:06:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:31,568 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:06:31,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:06:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:06:31,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822320475] [2020-08-21 15:06:31,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:06:31,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:06:31,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145777631] [2020-08-21 15:06:31,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:06:31,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:06:31,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:06:31,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:06:31,630 INFO L87 Difference]: Start difference. First operand 10577 states and 15370 transitions. Second operand 5 states. [2020-08-21 15:06:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:06:34,852 INFO L93 Difference]: Finished difference Result 30843 states and 44647 transitions. [2020-08-21 15:06:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:06:34,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-21 15:06:34,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:06:34,880 INFO L225 Difference]: With dead ends: 30843 [2020-08-21 15:06:34,880 INFO L226 Difference]: Without dead ends: 20313 [2020-08-21 15:06:34,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:06:34,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20313 states. [2020-08-21 15:06:35,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20313 to 20283. [2020-08-21 15:06:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20283 states. [2020-08-21 15:06:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 29041 transitions. [2020-08-21 15:06:35,807 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 29041 transitions. Word has length 152 [2020-08-21 15:06:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:06:35,807 INFO L479 AbstractCegarLoop]: Abstraction has 20283 states and 29041 transitions. [2020-08-21 15:06:35,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:06:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 29041 transitions. [2020-08-21 15:06:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-21 15:06:35,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:06:35,821 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:06:35,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:06:35,821 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:06:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:06:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash -695536157, now seen corresponding path program 1 times [2020-08-21 15:06:35,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:06:35,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419110893] [2020-08-21 15:06:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:06:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:36,199 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 15:06:36,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:06:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:06:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:06:36,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419110893] [2020-08-21 15:06:36,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:06:36,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:06:36,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575142353] [2020-08-21 15:06:36,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:06:36,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:06:36,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:06:36,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:06:36,248 INFO L87 Difference]: Start difference. First operand 20283 states and 29041 transitions. Second operand 5 states. [2020-08-21 15:06:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:06:40,769 INFO L93 Difference]: Finished difference Result 54646 states and 77842 transitions. [2020-08-21 15:06:40,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:06:40,770 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-21 15:06:40,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:06:40,813 INFO L225 Difference]: With dead ends: 54646 [2020-08-21 15:06:40,813 INFO L226 Difference]: Without dead ends: 34484 [2020-08-21 15:06:40,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:06:40,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34484 states.