/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:30:49,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:30:49,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:30:49,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:30:49,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:30:49,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:30:49,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:30:49,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:30:49,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:30:49,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:30:49,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:30:49,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:30:49,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:30:49,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:30:49,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:30:49,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:30:49,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:30:49,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:30:49,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:30:49,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:30:49,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:30:49,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:30:49,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:30:49,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:30:49,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 11:30:49,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:30:49,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:30:49,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:30:49,844 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 11:30:49,865 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:30:49,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:30:49,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:30:49,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:30:49,867 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:30:49,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:30:49,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:30:49,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:30:49,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:30:49,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:30:49,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:30:49,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:30:49,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:30:49,869 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:30:49,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:30:49,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:30:49,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:30:49,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:30:49,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:30:49,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:30:49,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:30:49,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:30:49,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:30:49,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:30:49,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:30:49,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:30:49,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:30:49,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:30:49,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:30:49,872 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 [2020-08-18 11:30:50,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:30:50,190 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:30:50,194 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:30:50,195 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:30:50,195 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:30:50,197 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 11:30:50,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/389e9f86d/e23d291dc1244acabb52b978c4f4e9c2/FLAGf73df7813 [2020-08-18 11:30:50,899 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:30:50,899 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 11:30:50,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/389e9f86d/e23d291dc1244acabb52b978c4f4e9c2/FLAGf73df7813 [2020-08-18 11:30:51,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/389e9f86d/e23d291dc1244acabb52b978c4f4e9c2 [2020-08-18 11:30:51,106 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:30:51,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:30:51,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:30:51,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:30:51,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:30:51,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:30:51" (1/1) ... [2020-08-18 11:30:51,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701ef800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:51, skipping insertion in model container [2020-08-18 11:30:51,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:30:51" (1/1) ... [2020-08-18 11:30:51,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:30:51,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:30:52,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:30:52,295 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:30:52,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:30:52,853 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:30:52,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:52 WrapperNode [2020-08-18 11:30:52,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:30:52,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:30:52,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:30:52,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:30:52,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:52" (1/1) ... [2020-08-18 11:30:52,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:52" (1/1) ... [2020-08-18 11:30:52,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:52" (1/1) ... [2020-08-18 11:30:52,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:52" (1/1) ... [2020-08-18 11:30:52,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:52" (1/1) ... [2020-08-18 11:30:53,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:52" (1/1) ... [2020-08-18 11:30:53,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:52" (1/1) ... [2020-08-18 11:30:53,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:30:53,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:30:53,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:30:53,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:30:53,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:52" (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 11:30:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:30:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:30:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 11:30:53,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:30:53,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:30:53,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 11:30:53,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 11:30:53,164 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 11:30:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 11:30:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 11:30:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 11:30:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 11:30:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 11:30:53,166 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 11:30:53,166 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 11:30:53,166 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 11:30:53,166 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 11:30:53,166 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 11:30:53,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:30:53,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:30:53,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:30:55,676 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:30:55,677 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 11:30:55,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:30:55 BoogieIcfgContainer [2020-08-18 11:30:55,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:30:55,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:30:55,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:30:55,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:30:55,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:30:51" (1/3) ... [2020-08-18 11:30:55,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea771e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:30:55, skipping insertion in model container [2020-08-18 11:30:55,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:52" (2/3) ... [2020-08-18 11:30:55,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea771e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:30:55, skipping insertion in model container [2020-08-18 11:30:55,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:30:55" (3/3) ... [2020-08-18 11:30:55,695 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 11:30:55,705 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:30:55,714 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:30:55,729 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:30:55,757 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:30:55,758 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:30:55,758 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:30:55,758 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:30:55,758 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:30:55,758 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:30:55,758 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:30:55,758 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:30:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-08-18 11:30:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-08-18 11:30:55,826 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:30:55,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:30:55,828 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:30:55,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:30:55,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-08-18 11:30:55,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:30:55,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685851742] [2020-08-18 11:30:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:30:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:57,933 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 11:30:57,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:30:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:30:58,184 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 11:30:58,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685851742] [2020-08-18 11:30:58,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:30:58,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:30:58,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362540138] [2020-08-18 11:30:58,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:30:58,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:30:58,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:30:58,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:30:58,214 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-08-18 11:31:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:31:06,399 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-08-18 11:31:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 11:31:06,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-08-18 11:31:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:31:06,438 INFO L225 Difference]: With dead ends: 2333 [2020-08-18 11:31:06,439 INFO L226 Difference]: Without dead ends: 1545 [2020-08-18 11:31:06,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:31:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-08-18 11:31:06,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-08-18 11:31:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-08-18 11:31:06,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-08-18 11:31:06,630 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-08-18 11:31:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:31:06,631 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-08-18 11:31:06,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:31:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-08-18 11:31:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-18 11:31:06,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:31:06,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:31:06,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:31:06,644 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:31:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:31:06,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-08-18 11:31:06,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:31:06,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883692422] [2020-08-18 11:31:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:31:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:07,470 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 11:31:07,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:31:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:07,903 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 11:31:07,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883692422] [2020-08-18 11:31:07,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:31:07,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:31:07,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592395034] [2020-08-18 11:31:07,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:31:07,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:31:07,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:31:07,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:07,909 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-08-18 11:31:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:31:16,662 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-08-18 11:31:16,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 11:31:16,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-18 11:31:16,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:31:16,682 INFO L225 Difference]: With dead ends: 4438 [2020-08-18 11:31:16,682 INFO L226 Difference]: Without dead ends: 3024 [2020-08-18 11:31:16,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:16,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-08-18 11:31:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-08-18 11:31:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-08-18 11:31:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-08-18 11:31:16,813 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-08-18 11:31:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:31:16,814 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-08-18 11:31:16,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:31:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-08-18 11:31:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-18 11:31:16,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:31:16,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:31:16,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:31:16,826 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:31:16,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:31:16,827 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-08-18 11:31:16,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:31:16,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001268683] [2020-08-18 11:31:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:31:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:17,403 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 11:31:17,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:31:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:17,523 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 11:31:17,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001268683] [2020-08-18 11:31:17,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:31:17,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:31:17,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249483720] [2020-08-18 11:31:17,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:31:17,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:31:17,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:31:17,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:17,535 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-08-18 11:31:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:31:25,396 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-08-18 11:31:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 11:31:25,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-18 11:31:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:31:25,422 INFO L225 Difference]: With dead ends: 8991 [2020-08-18 11:31:25,422 INFO L226 Difference]: Without dead ends: 6011 [2020-08-18 11:31:25,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:25,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-08-18 11:31:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-08-18 11:31:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-08-18 11:31:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-08-18 11:31:25,574 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-08-18 11:31:25,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:31:25,574 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-08-18 11:31:25,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:31:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-08-18 11:31:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-18 11:31:25,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:31:25,584 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:31:25,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:31:25,585 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:31:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:31:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-08-18 11:31:25,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:31:25,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075536296] [2020-08-18 11:31:25,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:31:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:26,142 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 11:31:26,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:31:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:26,238 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 11:31:26,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075536296] [2020-08-18 11:31:26,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:31:26,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:31:26,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539444841] [2020-08-18 11:31:26,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:31:26,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:31:26,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:31:26,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:26,241 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-08-18 11:31:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:31:34,151 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-08-18 11:31:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 11:31:34,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-18 11:31:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:31:34,177 INFO L225 Difference]: With dead ends: 9010 [2020-08-18 11:31:34,177 INFO L226 Difference]: Without dead ends: 6029 [2020-08-18 11:31:34,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-08-18 11:31:34,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-08-18 11:31:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-08-18 11:31:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-08-18 11:31:34,339 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-08-18 11:31:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:31:34,339 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-08-18 11:31:34,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:31:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-08-18 11:31:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-18 11:31:34,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:31:34,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:31:34,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:31:34,348 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:31:34,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:31:34,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-08-18 11:31:34,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:31:34,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537331390] [2020-08-18 11:31:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:31:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:35,018 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 11:31:35,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:31:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:35,215 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 11:31:35,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537331390] [2020-08-18 11:31:35,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:31:35,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:31:35,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029190290] [2020-08-18 11:31:35,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:31:35,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:31:35,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:31:35,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:35,217 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-08-18 11:31:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:31:43,540 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-08-18 11:31:43,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 11:31:43,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-18 11:31:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:31:43,566 INFO L225 Difference]: With dead ends: 8718 [2020-08-18 11:31:43,567 INFO L226 Difference]: Without dead ends: 5904 [2020-08-18 11:31:43,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:43,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-08-18 11:31:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-08-18 11:31:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-08-18 11:31:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-08-18 11:31:43,864 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-08-18 11:31:43,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:31:43,865 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-08-18 11:31:43,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:31:43,866 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-08-18 11:31:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-18 11:31:43,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:31:43,878 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:31:43,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:31:43,878 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:31:43,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:31:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-08-18 11:31:43,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:31:43,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018107810] [2020-08-18 11:31:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:31:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:44,751 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 11:31:44,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:31:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:44,875 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 11:31:44,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018107810] [2020-08-18 11:31:44,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:31:44,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:31:44,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169033422] [2020-08-18 11:31:44,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:31:44,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:31:44,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:31:44,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:31:44,881 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states.