/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=LOWLEXORDER -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 0.1.25-5644d1e-m [2020-08-18 18:51:44,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:51:44,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:51:44,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:51:44,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:51:44,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:51:44,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:51:44,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:51:44,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:51:44,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:51:44,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:51:44,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:51:44,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:51:44,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:51:44,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:51:44,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:51:44,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:51:44,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:51:44,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:51:44,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:51:44,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:51:44,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:51:44,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:51:44,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:51:44,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:51:44,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:51:44,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:51:44,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:51:44,566 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 [2020-08-18 18:51:44,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:51:44,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:51:44,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:51:44,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:51:44,622 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:51:44,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:51:44,624 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:51:44,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:51:44,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:51:44,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:51:44,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:51:44,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:51:44,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:51:44,625 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:51:44,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:51:44,626 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:51:44,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:51:44,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:51:44,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:51:44,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:51:44,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:51:44,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:51:44,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:51:44,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:51:44,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:51:44,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:51:44,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:51:44,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:51:44,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:51:44,631 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:51:44,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:51:44,942 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:51:44,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:51:44,947 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:51:44,948 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:51:44,948 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-18 18:51:45,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bdccd76f0/397452fcd8bd4df48cdb72dbb8461101/FLAGe6d015c3d [2020-08-18 18:51:45,615 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:51:45,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-18 18:51:45,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bdccd76f0/397452fcd8bd4df48cdb72dbb8461101/FLAGe6d015c3d [2020-08-18 18:51:45,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bdccd76f0/397452fcd8bd4df48cdb72dbb8461101 [2020-08-18 18:51:45,893 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:51:45,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:51:45,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:51:45,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:51:45,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:51:45,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:51:45" (1/1) ... [2020-08-18 18:51:45,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e0ef97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:45, skipping insertion in model container [2020-08-18 18:51:45,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:51:45" (1/1) ... [2020-08-18 18:51:45,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:51:46,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:51:46,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:51:46,761 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:51:46,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:51:47,016 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:51:47,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:47 WrapperNode [2020-08-18 18:51:47,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:51:47,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:51:47,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:51:47,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:51:47,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:47" (1/1) ... [2020-08-18 18:51:47,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:47" (1/1) ... [2020-08-18 18:51:47,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:47" (1/1) ... [2020-08-18 18:51:47,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:47" (1/1) ... [2020-08-18 18:51:47,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:47" (1/1) ... [2020-08-18 18:51:47,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:47" (1/1) ... [2020-08-18 18:51:47,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:47" (1/1) ... [2020-08-18 18:51:47,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:51:47,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:51:47,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:51:47,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:51:47,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:47" (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 [2020-08-18 18:51:47,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:51:47,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:51:47,299 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 18:51:47,299 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:51:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:51:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 18:51:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 18:51:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 18:51:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 18:51:47,301 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 18:51:47,301 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 18:51:47,301 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 18:51:47,302 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 18:51:47,302 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 18:51:47,302 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 18:51:47,303 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 18:51:47,303 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 18:51:47,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:51:47,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:51:47,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:51:49,071 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:51:49,072 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 18:51:49,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:51:49 BoogieIcfgContainer [2020-08-18 18:51:49,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:51:49,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:51:49,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:51:49,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:51:49,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:51:45" (1/3) ... [2020-08-18 18:51:49,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3adfe894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:51:49, skipping insertion in model container [2020-08-18 18:51:49,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:47" (2/3) ... [2020-08-18 18:51:49,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3adfe894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:51:49, skipping insertion in model container [2020-08-18 18:51:49,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:51:49" (3/3) ... [2020-08-18 18:51:49,090 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-18 18:51:49,103 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:51:49,112 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-08-18 18:51:49,128 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-08-18 18:51:49,156 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:51:49,156 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:51:49,156 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:51:49,157 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:51:49,157 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:51:49,157 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:51:49,157 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:51:49,157 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:51:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states. [2020-08-18 18:51:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 18:51:49,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:49,204 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] [2020-08-18 18:51:49,205 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:49,211 INFO L82 PathProgramCache]: Analyzing trace with hash 604537660, now seen corresponding path program 1 times [2020-08-18 18:51:49,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:49,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416192397] [2020-08-18 18:51:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:50,304 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:51:50,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:51:50,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416192397] [2020-08-18 18:51:50,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:51:50,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:51:50,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920287035] [2020-08-18 18:51:50,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:51:50,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:50,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:51:50,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:51:50,443 INFO L87 Difference]: Start difference. First operand 412 states. Second operand 4 states. [2020-08-18 18:51:50,756 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-18 18:51:53,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:53,560 INFO L93 Difference]: Finished difference Result 754 states and 1320 transitions. [2020-08-18 18:51:53,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:51:53,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-18 18:51:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:53,583 INFO L225 Difference]: With dead ends: 754 [2020-08-18 18:51:53,583 INFO L226 Difference]: Without dead ends: 593 [2020-08-18 18:51:53,588 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 [2020-08-18 18:51:53,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-08-18 18:51:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2020-08-18 18:51:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-18 18:51:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 870 transitions. [2020-08-18 18:51:53,694 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 870 transitions. Word has length 146 [2020-08-18 18:51:53,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:53,695 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 870 transitions. [2020-08-18 18:51:53,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:51:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 870 transitions. [2020-08-18 18:51:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 18:51:53,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:53,700 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] [2020-08-18 18:51:53,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:51:53,701 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash 694944860, now seen corresponding path program 1 times [2020-08-18 18:51:53,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:53,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675946004] [2020-08-18 18:51:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:54,120 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:51:54,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:51:54,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675946004] [2020-08-18 18:51:54,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:51:54,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:51:54,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991068346] [2020-08-18 18:51:54,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:51:54,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:54,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:51:54,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:51:54,172 INFO L87 Difference]: Start difference. First operand 591 states and 870 transitions. Second operand 4 states. [2020-08-18 18:51:54,485 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-18 18:51:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:56,647 INFO L93 Difference]: Finished difference Result 1190 states and 1805 transitions. [2020-08-18 18:51:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:51:56,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-18 18:51:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:56,659 INFO L225 Difference]: With dead ends: 1190 [2020-08-18 18:51:56,660 INFO L226 Difference]: Without dead ends: 961 [2020-08-18 18:51:56,668 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 [2020-08-18 18:51:56,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-08-18 18:51:56,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2020-08-18 18:51:56,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-08-18 18:51:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1434 transitions. [2020-08-18 18:51:56,743 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1434 transitions. Word has length 146 [2020-08-18 18:51:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:56,744 INFO L479 AbstractCegarLoop]: Abstraction has 959 states and 1434 transitions. [2020-08-18 18:51:56,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:51:56,744 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1434 transitions. [2020-08-18 18:51:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 18:51:56,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:56,747 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] [2020-08-18 18:51:56,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:51:56,748 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1369993092, now seen corresponding path program 1 times [2020-08-18 18:51:56,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:56,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141927609] [2020-08-18 18:51:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:57,187 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:51:57,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:51:57,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141927609] [2020-08-18 18:51:57,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:51:57,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:51:57,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023690033] [2020-08-18 18:51:57,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:51:57,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:57,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:51:57,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:51:57,236 INFO L87 Difference]: Start difference. First operand 959 states and 1434 transitions. Second operand 4 states. [2020-08-18 18:51:57,478 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-18 18:51:59,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:59,753 INFO L93 Difference]: Finished difference Result 2090 states and 3210 transitions. [2020-08-18 18:51:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:51:59,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-18 18:51:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:59,777 INFO L225 Difference]: With dead ends: 2090 [2020-08-18 18:51:59,777 INFO L226 Difference]: Without dead ends: 1701 [2020-08-18 18:51:59,780 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 [2020-08-18 18:51:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2020-08-18 18:51:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2020-08-18 18:51:59,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-08-18 18:51:59,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2566 transitions. [2020-08-18 18:51:59,887 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2566 transitions. Word has length 146 [2020-08-18 18:51:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:59,888 INFO L479 AbstractCegarLoop]: Abstraction has 1699 states and 2566 transitions. [2020-08-18 18:51:59,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:51:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2566 transitions. [2020-08-18 18:51:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 18:51:59,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:59,894 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] [2020-08-18 18:51:59,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:51:59,895 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:59,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1370331716, now seen corresponding path program 1 times [2020-08-18 18:51:59,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:59,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522776802] [2020-08-18 18:51:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:52:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:00,602 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:52:00,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:52:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:52:00,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522776802] [2020-08-18 18:52:00,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:52:00,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:52:00,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119069946] [2020-08-18 18:52:00,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:52:00,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:52:00,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:52:00,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:52:00,655 INFO L87 Difference]: Start difference. First operand 1699 states and 2566 transitions. Second operand 5 states. [2020-08-18 18:52:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:52:04,558 INFO L93 Difference]: Finished difference Result 4967 states and 7485 transitions. [2020-08-18 18:52:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:52:04,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-18 18:52:04,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:52:04,576 INFO L225 Difference]: With dead ends: 4967 [2020-08-18 18:52:04,576 INFO L226 Difference]: Without dead ends: 3281 [2020-08-18 18:52:04,582 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 [2020-08-18 18:52:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2020-08-18 18:52:04,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 3235. [2020-08-18 18:52:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2020-08-18 18:52:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 4851 transitions. [2020-08-18 18:52:04,729 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 4851 transitions. Word has length 146 [2020-08-18 18:52:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:52:04,730 INFO L479 AbstractCegarLoop]: Abstraction has 3235 states and 4851 transitions. [2020-08-18 18:52:04,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:52:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 4851 transitions. [2020-08-18 18:52:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 18:52:04,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:52:04,737 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] [2020-08-18 18:52:04,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:52:04,740 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:52:04,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:52:04,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1648495204, now seen corresponding path program 1 times [2020-08-18 18:52:04,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:52:04,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413677810] [2020-08-18 18:52:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:52:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:05,181 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:52:05,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:52:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:52:05,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413677810] [2020-08-18 18:52:05,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:52:05,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:52:05,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464693980] [2020-08-18 18:52:05,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:52:05,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:52:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:52:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:52:05,230 INFO L87 Difference]: Start difference. First operand 3235 states and 4851 transitions. Second operand 4 states. [2020-08-18 18:52:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:52:08,194 INFO L93 Difference]: Finished difference Result 9659 states and 14483 transitions. [2020-08-18 18:52:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:52:08,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-08-18 18:52:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:52:08,226 INFO L225 Difference]: With dead ends: 9659 [2020-08-18 18:52:08,227 INFO L226 Difference]: Without dead ends: 6456 [2020-08-18 18:52:08,234 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 [2020-08-18 18:52:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2020-08-18 18:52:08,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 3237. [2020-08-18 18:52:08,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3237 states. [2020-08-18 18:52:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4853 transitions. [2020-08-18 18:52:08,429 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4853 transitions. Word has length 147 [2020-08-18 18:52:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:52:08,430 INFO L479 AbstractCegarLoop]: Abstraction has 3237 states and 4853 transitions. [2020-08-18 18:52:08,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:52:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4853 transitions. [2020-08-18 18:52:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-18 18:52:08,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:52:08,436 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] [2020-08-18 18:52:08,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:52:08,436 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:52:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:52:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash 921116989, now seen corresponding path program 1 times [2020-08-18 18:52:08,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:52:08,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2822048] [2020-08-18 18:52:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:52:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:08,872 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:52:08,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:52:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:52:08,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2822048] [2020-08-18 18:52:08,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:52:08,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:52:08,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247764330] [2020-08-18 18:52:08,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:52:08,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:52:08,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:52:08,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:52:08,944 INFO L87 Difference]: Start difference. First operand 3237 states and 4853 transitions. Second operand 5 states. [2020-08-18 18:52:12,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:52:12,219 INFO L93 Difference]: Finished difference Result 9441 states and 14115 transitions. [2020-08-18 18:52:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:52:12,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-08-18 18:52:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:52:12,249 INFO L225 Difference]: With dead ends: 9441 [2020-08-18 18:52:12,250 INFO L226 Difference]: Without dead ends: 6238 [2020-08-18 18:52:12,257 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 [2020-08-18 18:52:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2020-08-18 18:52:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 6192. [2020-08-18 18:52:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6192 states. [2020-08-18 18:52:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 9193 transitions. [2020-08-18 18:52:12,601 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 9193 transitions. Word has length 148 [2020-08-18 18:52:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:52:12,601 INFO L479 AbstractCegarLoop]: Abstraction has 6192 states and 9193 transitions. [2020-08-18 18:52:12,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:52:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 9193 transitions. [2020-08-18 18:52:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-18 18:52:12,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:52:12,613 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] [2020-08-18 18:52:12,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:52:12,613 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:52:12,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:52:12,614 INFO L82 PathProgramCache]: Analyzing trace with hash 239618117, now seen corresponding path program 1 times [2020-08-18 18:52:12,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:52:12,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858058821] [2020-08-18 18:52:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:52:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:12,913 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:52:12,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:52:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:52:12,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858058821] [2020-08-18 18:52:12,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:52:12,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:52:12,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136282775] [2020-08-18 18:52:12,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:52:12,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:52:12,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:52:12,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:52:12,959 INFO L87 Difference]: Start difference. First operand 6192 states and 9193 transitions. Second operand 4 states. [2020-08-18 18:52:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:52:16,484 INFO L93 Difference]: Finished difference Result 18492 states and 27451 transitions. [2020-08-18 18:52:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:52:16,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-08-18 18:52:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:52:16,531 INFO L225 Difference]: With dead ends: 18492 [2020-08-18 18:52:16,531 INFO L226 Difference]: Without dead ends: 12348 [2020-08-18 18:52:16,545 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 [2020-08-18 18:52:16,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12348 states. [2020-08-18 18:52:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12348 to 6196. [2020-08-18 18:52:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6196 states. [2020-08-18 18:52:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 9197 transitions. [2020-08-18 18:52:16,929 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 9197 transitions. Word has length 149 [2020-08-18 18:52:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:52:16,930 INFO L479 AbstractCegarLoop]: Abstraction has 6196 states and 9197 transitions. [2020-08-18 18:52:16,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:52:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 9197 transitions. [2020-08-18 18:52:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 18:52:16,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:52:16,939 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] [2020-08-18 18:52:16,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:52:16,940 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:52:16,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:52:16,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1772203169, now seen corresponding path program 1 times [2020-08-18 18:52:16,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:52:16,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193897375] [2020-08-18 18:52:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:52:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:17,255 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:52:17,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:52:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:52:17,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193897375] [2020-08-18 18:52:17,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:52:17,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:52:17,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185917220] [2020-08-18 18:52:17,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:52:17,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:52:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:52:17,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:52:17,305 INFO L87 Difference]: Start difference. First operand 6196 states and 9197 transitions. Second operand 4 states. [2020-08-18 18:52:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:52:20,577 INFO L93 Difference]: Finished difference Result 16495 states and 24448 transitions. [2020-08-18 18:52:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:52:20,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-08-18 18:52:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:52:20,598 INFO L225 Difference]: With dead ends: 16495 [2020-08-18 18:52:20,599 INFO L226 Difference]: Without dead ends: 10615 [2020-08-18 18:52:20,611 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 [2020-08-18 18:52:20,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2020-08-18 18:52:21,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10569. [2020-08-18 18:52:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-18 18:52:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15484 transitions. [2020-08-18 18:52:21,033 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15484 transitions. Word has length 150 [2020-08-18 18:52:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:52:21,033 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15484 transitions. [2020-08-18 18:52:21,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:52:21,034 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15484 transitions. [2020-08-18 18:52:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 18:52:21,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:52:21,050 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] [2020-08-18 18:52:21,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:52:21,050 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:52:21,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:52:21,051 INFO L82 PathProgramCache]: Analyzing trace with hash 251552574, now seen corresponding path program 1 times [2020-08-18 18:52:21,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:52:21,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222430109] [2020-08-18 18:52:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:52:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:21,577 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:52:21,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:52:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:52:21,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222430109] [2020-08-18 18:52:21,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:52:21,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:52:21,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154738560] [2020-08-18 18:52:21,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:52:21,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:52:21,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:52:21,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:52:21,617 INFO L87 Difference]: Start difference. First operand 10569 states and 15484 transitions. Second operand 5 states. [2020-08-18 18:52:24,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:52:24,067 INFO L93 Difference]: Finished difference Result 21564 states and 31467 transitions. [2020-08-18 18:52:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:52:24,067 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-18 18:52:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:52:24,093 INFO L225 Difference]: With dead ends: 21564 [2020-08-18 18:52:24,093 INFO L226 Difference]: Without dead ends: 10851 [2020-08-18 18:52:24,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:52:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-18 18:52:24,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10805. [2020-08-18 18:52:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10805 states. [2020-08-18 18:52:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10805 states to 10805 states and 15660 transitions. [2020-08-18 18:52:24,699 INFO L78 Accepts]: Start accepts. Automaton has 10805 states and 15660 transitions. Word has length 150 [2020-08-18 18:52:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:52:24,700 INFO L479 AbstractCegarLoop]: Abstraction has 10805 states and 15660 transitions. [2020-08-18 18:52:24,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:52:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 10805 states and 15660 transitions. [2020-08-18 18:52:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 18:52:24,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:52:24,713 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] [2020-08-18 18:52:24,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:52:24,713 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:52:24,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:52:24,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1535594178, now seen corresponding path program 1 times [2020-08-18 18:52:24,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:52:24,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103909890] [2020-08-18 18:52:24,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:52:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:25,074 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:52:25,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:52:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:52:25,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103909890] [2020-08-18 18:52:25,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:52:25,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:52:25,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904796721] [2020-08-18 18:52:25,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:52:25,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:52:25,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:52:25,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:52:25,124 INFO L87 Difference]: Start difference. First operand 10805 states and 15660 transitions. Second operand 5 states. [2020-08-18 18:52:28,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:52:28,596 INFO L93 Difference]: Finished difference Result 15230 states and 22013 transitions. [2020-08-18 18:52:28,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:52:28,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-18 18:52:28,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:52:28,615 INFO L225 Difference]: With dead ends: 15230 [2020-08-18 18:52:28,615 INFO L226 Difference]: Without dead ends: 10851 [2020-08-18 18:52:28,625 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 [2020-08-18 18:52:28,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-18 18:52:29,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10569. [2020-08-18 18:52:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-18 18:52:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15362 transitions. [2020-08-18 18:52:29,086 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15362 transitions. Word has length 150 [2020-08-18 18:52:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:52:29,086 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15362 transitions. [2020-08-18 18:52:29,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:52:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15362 transitions. [2020-08-18 18:52:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 18:52:29,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:52:29,633 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] [2020-08-18 18:52:29,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:52:29,633 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:52:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:52:29,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1232731994, now seen corresponding path program 1 times [2020-08-18 18:52:29,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:52:29,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816879773] [2020-08-18 18:52:29,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:52:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:30,010 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:52:30,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:52:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:52:30,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816879773] [2020-08-18 18:52:30,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:52:30,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:52:30,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438584864] [2020-08-18 18:52:30,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:52:30,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:52:30,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:52:30,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:52:30,071 INFO L87 Difference]: Start difference. First operand 10569 states and 15362 transitions. Second operand 4 states. [2020-08-18 18:52:34,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:52:34,021 INFO L93 Difference]: Finished difference Result 25409 states and 36872 transitions. [2020-08-18 18:52:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:52:34,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-08-18 18:52:34,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:52:34,047 INFO L225 Difference]: With dead ends: 25409 [2020-08-18 18:52:34,047 INFO L226 Difference]: Without dead ends: 21030 [2020-08-18 18:52:34,060 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 [2020-08-18 18:52:34,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21030 states. [2020-08-18 18:52:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21030 to 10577. [2020-08-18 18:52:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10577 states. [2020-08-18 18:52:34,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 15370 transitions. [2020-08-18 18:52:34,613 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 15370 transitions. Word has length 151 [2020-08-18 18:52:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:52:34,614 INFO L479 AbstractCegarLoop]: Abstraction has 10577 states and 15370 transitions. [2020-08-18 18:52:34,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:52:34,614 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 15370 transitions. [2020-08-18 18:52:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-18 18:52:34,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:52:34,625 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] [2020-08-18 18:52:34,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:52:34,625 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:52:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:52:34,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1234425885, now seen corresponding path program 1 times [2020-08-18 18:52:34,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:52:34,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742452371] [2020-08-18 18:52:34,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:52:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:34,983 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:52:34,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:52:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:52:35,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742452371] [2020-08-18 18:52:35,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:52:35,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:52:35,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232068305] [2020-08-18 18:52:35,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:52:35,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:52:35,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:52:35,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:52:35,078 INFO L87 Difference]: Start difference. First operand 10577 states and 15370 transitions. Second operand 5 states. [2020-08-18 18:52:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:52:38,371 INFO L93 Difference]: Finished difference Result 30843 states and 44647 transitions. [2020-08-18 18:52:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:52:38,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-18 18:52:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:52:38,391 INFO L225 Difference]: With dead ends: 30843 [2020-08-18 18:52:38,391 INFO L226 Difference]: Without dead ends: 20313 [2020-08-18 18:52:38,409 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 [2020-08-18 18:52:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20313 states. [2020-08-18 18:52:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20313 to 20283. [2020-08-18 18:52:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20283 states. [2020-08-18 18:52:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 29041 transitions. [2020-08-18 18:52:39,172 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 29041 transitions. Word has length 152 [2020-08-18 18:52:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:52:39,172 INFO L479 AbstractCegarLoop]: Abstraction has 20283 states and 29041 transitions. [2020-08-18 18:52:39,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:52:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 29041 transitions. [2020-08-18 18:52:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-18 18:52:39,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:52:39,187 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] [2020-08-18 18:52:39,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:52:39,187 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:52:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:52:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash -695536157, now seen corresponding path program 1 times [2020-08-18 18:52:39,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:52:39,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75323924] [2020-08-18 18:52:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:52:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:39,534 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 18:52:39,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:52:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:52:39,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75323924] [2020-08-18 18:52:39,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:52:39,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:52:39,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060347464] [2020-08-18 18:52:39,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:52:39,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:52:39,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:52:39,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:52:39,601 INFO L87 Difference]: Start difference. First operand 20283 states and 29041 transitions. Second operand 5 states.