/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:49:51,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:49:51,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:49:51,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:49:51,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:49:51,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:49:51,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:49:51,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:49:51,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:49:51,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:49:51,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:49:51,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:49:51,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:49:51,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:49:51,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:49:51,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:49:51,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:49:51,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:49:51,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:49:51,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:49:51,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:49:51,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:49:51,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:49:51,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:49:51,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:49:51,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:49:51,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:49:51,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:49:51,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:49:51,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 04:49:51,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:49:51,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:49:51,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:49:51,901 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 [2020-08-22 04:49:51,923 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:49:51,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:49:51,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:49:51,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:49:51,925 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:49:51,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:49:51,925 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:49:51,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:49:51,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:49:51,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:49:51,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:49:51,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:49:51,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:49:51,926 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:49:51,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:49:51,927 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:49:51,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:49:51,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:49:51,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:49:51,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:49:51,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:49:51,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:49:51,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:49:51,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:49:51,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:49:51,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:49:51,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:49:51,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:49:51,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:49:51,929 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:49:52,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:49:52,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:49:52,280 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:49:52,282 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:49:52,284 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:49:52,285 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-22 04:49:52,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45c152c7b/af6647ba92034c03b6a4fbf85ecb8d8c/FLAGd6650f4b4 [2020-08-22 04:49:52,956 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:49:52,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-22 04:49:52,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45c152c7b/af6647ba92034c03b6a4fbf85ecb8d8c/FLAGd6650f4b4 [2020-08-22 04:49:53,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45c152c7b/af6647ba92034c03b6a4fbf85ecb8d8c [2020-08-22 04:49:53,192 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:49:53,194 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:49:53,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:49:53,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:49:53,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:49:53,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:49:53" (1/1) ... [2020-08-22 04:49:53,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52aff8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:49:53, skipping insertion in model container [2020-08-22 04:49:53,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:49:53" (1/1) ... [2020-08-22 04:49:53,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:49:53,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:49:54,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:49:54,090 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:49:54,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:49:54,533 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:49:54,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:49:54 WrapperNode [2020-08-22 04:49:54,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:49:54,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:49:54,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:49:54,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:49:54,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:49:54" (1/1) ... [2020-08-22 04:49:54,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:49:54" (1/1) ... [2020-08-22 04:49:54,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:49:54" (1/1) ... [2020-08-22 04:49:54,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:49:54" (1/1) ... [2020-08-22 04:49:54,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:49:54" (1/1) ... [2020-08-22 04:49:54,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:49:54" (1/1) ... [2020-08-22 04:49:54,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:49:54" (1/1) ... [2020-08-22 04:49:54,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:49:54,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:49:54,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:49:54,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:49:54,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:49:54" (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 [2020-08-22 04:49:54,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:49:54,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:49:54,763 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 04:49:54,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:49:54,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:49:54,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 04:49:54,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 04:49:54,765 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 04:49:54,766 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 04:49:54,767 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 04:49:54,767 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 04:49:54,767 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 04:49:54,768 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 04:49:54,768 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 04:49:54,768 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 04:49:54,769 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 04:49:54,770 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 04:49:54,770 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:49:54,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:49:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:49:56,925 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:49:56,925 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 04:49:56,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:49:56 BoogieIcfgContainer [2020-08-22 04:49:56,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:49:56,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:49:56,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:49:56,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:49:56,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:49:53" (1/3) ... [2020-08-22 04:49:56,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2fb1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:49:56, skipping insertion in model container [2020-08-22 04:49:56,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:49:54" (2/3) ... [2020-08-22 04:49:56,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2fb1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:49:56, skipping insertion in model container [2020-08-22 04:49:56,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:49:56" (3/3) ... [2020-08-22 04:49:56,942 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-22 04:49:56,955 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:49:56,964 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-08-22 04:49:56,981 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-08-22 04:49:57,013 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:49:57,013 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:49:57,014 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:49:57,014 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:49:57,014 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:49:57,014 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:49:57,014 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:49:57,015 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:49:57,046 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states. [2020-08-22 04:49:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 04:49:57,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:49:57,065 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] [2020-08-22 04:49:57,065 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:49:57,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:49:57,073 INFO L82 PathProgramCache]: Analyzing trace with hash 604537660, now seen corresponding path program 1 times [2020-08-22 04:49:57,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:49:57,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130769038] [2020-08-22 04:49:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:49:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:49:58,217 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:49:58,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:49:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:49:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:49:58,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130769038] [2020-08-22 04:49:58,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:49:58,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:49:58,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011012835] [2020-08-22 04:49:58,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:49:58,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:49:58,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:49:58,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:49:58,353 INFO L87 Difference]: Start difference. First operand 412 states. Second operand 4 states. [2020-08-22 04:49:58,710 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-22 04:50:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:01,532 INFO L93 Difference]: Finished difference Result 754 states and 1320 transitions. [2020-08-22 04:50:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:50:01,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-22 04:50:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:01,562 INFO L225 Difference]: With dead ends: 754 [2020-08-22 04:50:01,562 INFO L226 Difference]: Without dead ends: 593 [2020-08-22 04:50:01,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:50:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-08-22 04:50:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2020-08-22 04:50:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-22 04:50:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 870 transitions. [2020-08-22 04:50:01,660 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 870 transitions. Word has length 146 [2020-08-22 04:50:01,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:01,661 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 870 transitions. [2020-08-22 04:50:01,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:50:01,661 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 870 transitions. [2020-08-22 04:50:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 04:50:01,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:01,666 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] [2020-08-22 04:50:01,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:50:01,667 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:01,667 INFO L82 PathProgramCache]: Analyzing trace with hash 694944860, now seen corresponding path program 1 times [2020-08-22 04:50:01,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:01,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625561384] [2020-08-22 04:50:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:02,192 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:50:02,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:02,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625561384] [2020-08-22 04:50:02,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:02,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:50:02,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92871200] [2020-08-22 04:50:02,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:50:02,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:02,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:50:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:02,281 INFO L87 Difference]: Start difference. First operand 591 states and 870 transitions. Second operand 4 states. [2020-08-22 04:50:02,586 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-22 04:50:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:04,907 INFO L93 Difference]: Finished difference Result 1190 states and 1805 transitions. [2020-08-22 04:50:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:50:04,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-22 04:50:04,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:04,918 INFO L225 Difference]: With dead ends: 1190 [2020-08-22 04:50:04,919 INFO L226 Difference]: Without dead ends: 961 [2020-08-22 04:50:04,928 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 [2020-08-22 04:50:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-08-22 04:50:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2020-08-22 04:50:04,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-08-22 04:50:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1434 transitions. [2020-08-22 04:50:05,000 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1434 transitions. Word has length 146 [2020-08-22 04:50:05,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:05,002 INFO L479 AbstractCegarLoop]: Abstraction has 959 states and 1434 transitions. [2020-08-22 04:50:05,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:50:05,002 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1434 transitions. [2020-08-22 04:50:05,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 04:50:05,010 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:05,014 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] [2020-08-22 04:50:05,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:50:05,014 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:05,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:05,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1369993092, now seen corresponding path program 1 times [2020-08-22 04:50:05,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:05,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008373148] [2020-08-22 04:50:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:05,485 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:50:05,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:05,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008373148] [2020-08-22 04:50:05,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:05,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:50:05,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201595858] [2020-08-22 04:50:05,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:50:05,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:05,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:50:05,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:05,552 INFO L87 Difference]: Start difference. First operand 959 states and 1434 transitions. Second operand 4 states. [2020-08-22 04:50:05,915 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-22 04:50:08,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:08,445 INFO L93 Difference]: Finished difference Result 2090 states and 3210 transitions. [2020-08-22 04:50:08,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:50:08,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-22 04:50:08,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:08,461 INFO L225 Difference]: With dead ends: 2090 [2020-08-22 04:50:08,461 INFO L226 Difference]: Without dead ends: 1701 [2020-08-22 04:50:08,464 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 [2020-08-22 04:50:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2020-08-22 04:50:08,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2020-08-22 04:50:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-08-22 04:50:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2566 transitions. [2020-08-22 04:50:08,563 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2566 transitions. Word has length 146 [2020-08-22 04:50:08,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:08,564 INFO L479 AbstractCegarLoop]: Abstraction has 1699 states and 2566 transitions. [2020-08-22 04:50:08,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:50:08,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2566 transitions. [2020-08-22 04:50:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 04:50:08,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:08,575 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] [2020-08-22 04:50:08,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:50:08,576 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:08,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1370331716, now seen corresponding path program 1 times [2020-08-22 04:50:08,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:08,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660952729] [2020-08-22 04:50:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:09,172 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:50:09,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:09,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660952729] [2020-08-22 04:50:09,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:09,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:50:09,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138288260] [2020-08-22 04:50:09,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:50:09,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:09,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:50:09,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:50:09,233 INFO L87 Difference]: Start difference. First operand 1699 states and 2566 transitions. Second operand 5 states. [2020-08-22 04:50:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:13,145 INFO L93 Difference]: Finished difference Result 4967 states and 7485 transitions. [2020-08-22 04:50:13,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:50:13,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-22 04:50:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:13,162 INFO L225 Difference]: With dead ends: 4967 [2020-08-22 04:50:13,163 INFO L226 Difference]: Without dead ends: 3281 [2020-08-22 04:50:13,167 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 [2020-08-22 04:50:13,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2020-08-22 04:50:13,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 3235. [2020-08-22 04:50:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2020-08-22 04:50:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 4851 transitions. [2020-08-22 04:50:13,310 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 4851 transitions. Word has length 146 [2020-08-22 04:50:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:13,311 INFO L479 AbstractCegarLoop]: Abstraction has 3235 states and 4851 transitions. [2020-08-22 04:50:13,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:50:13,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 4851 transitions. [2020-08-22 04:50:13,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-22 04:50:13,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:13,316 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] [2020-08-22 04:50:13,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:50:13,319 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:13,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1648495204, now seen corresponding path program 1 times [2020-08-22 04:50:13,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:13,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161880682] [2020-08-22 04:50:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:13,631 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:50:13,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:13,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161880682] [2020-08-22 04:50:13,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:13,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:50:13,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934507898] [2020-08-22 04:50:13,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:50:13,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:13,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:50:13,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:13,681 INFO L87 Difference]: Start difference. First operand 3235 states and 4851 transitions. Second operand 4 states. [2020-08-22 04:50:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:16,064 INFO L93 Difference]: Finished difference Result 9659 states and 14483 transitions. [2020-08-22 04:50:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:50:16,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-08-22 04:50:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:16,096 INFO L225 Difference]: With dead ends: 9659 [2020-08-22 04:50:16,096 INFO L226 Difference]: Without dead ends: 6456 [2020-08-22 04:50:16,104 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 [2020-08-22 04:50:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2020-08-22 04:50:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 3237. [2020-08-22 04:50:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3237 states. [2020-08-22 04:50:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4853 transitions. [2020-08-22 04:50:16,271 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4853 transitions. Word has length 147 [2020-08-22 04:50:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:16,271 INFO L479 AbstractCegarLoop]: Abstraction has 3237 states and 4853 transitions. [2020-08-22 04:50:16,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:50:16,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4853 transitions. [2020-08-22 04:50:16,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-22 04:50:16,276 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:16,277 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] [2020-08-22 04:50:16,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:50:16,277 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash 921116989, now seen corresponding path program 1 times [2020-08-22 04:50:16,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:16,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419910699] [2020-08-22 04:50:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:16,652 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:50:16,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:16,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419910699] [2020-08-22 04:50:16,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:16,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:50:16,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22480052] [2020-08-22 04:50:16,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:50:16,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:16,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:50:16,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:50:16,714 INFO L87 Difference]: Start difference. First operand 3237 states and 4853 transitions. Second operand 5 states. [2020-08-22 04:50:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:19,821 INFO L93 Difference]: Finished difference Result 9441 states and 14115 transitions. [2020-08-22 04:50:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:50:19,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-08-22 04:50:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:19,847 INFO L225 Difference]: With dead ends: 9441 [2020-08-22 04:50:19,847 INFO L226 Difference]: Without dead ends: 6238 [2020-08-22 04:50:19,853 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 [2020-08-22 04:50:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2020-08-22 04:50:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 6192. [2020-08-22 04:50:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6192 states. [2020-08-22 04:50:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 9193 transitions. [2020-08-22 04:50:20,154 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 9193 transitions. Word has length 148 [2020-08-22 04:50:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:20,155 INFO L479 AbstractCegarLoop]: Abstraction has 6192 states and 9193 transitions. [2020-08-22 04:50:20,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:50:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 9193 transitions. [2020-08-22 04:50:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-22 04:50:20,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:20,171 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] [2020-08-22 04:50:20,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:50:20,171 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:20,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:20,172 INFO L82 PathProgramCache]: Analyzing trace with hash 239618117, now seen corresponding path program 1 times [2020-08-22 04:50:20,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:20,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418520669] [2020-08-22 04:50:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:20,480 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:50:20,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:20,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418520669] [2020-08-22 04:50:20,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:20,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:50:20,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874350919] [2020-08-22 04:50:20,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:50:20,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:20,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:50:20,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:20,519 INFO L87 Difference]: Start difference. First operand 6192 states and 9193 transitions. Second operand 4 states. [2020-08-22 04:50:23,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:23,980 INFO L93 Difference]: Finished difference Result 18492 states and 27451 transitions. [2020-08-22 04:50:23,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:50:23,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-08-22 04:50:23,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:24,030 INFO L225 Difference]: With dead ends: 18492 [2020-08-22 04:50:24,030 INFO L226 Difference]: Without dead ends: 12348 [2020-08-22 04:50:24,042 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 [2020-08-22 04:50:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12348 states. [2020-08-22 04:50:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12348 to 6196. [2020-08-22 04:50:24,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6196 states. [2020-08-22 04:50:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 9197 transitions. [2020-08-22 04:50:24,438 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 9197 transitions. Word has length 149 [2020-08-22 04:50:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:24,439 INFO L479 AbstractCegarLoop]: Abstraction has 6196 states and 9197 transitions. [2020-08-22 04:50:24,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:50:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 9197 transitions. [2020-08-22 04:50:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-22 04:50:24,448 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:24,448 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] [2020-08-22 04:50:24,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:50:24,449 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1772203169, now seen corresponding path program 1 times [2020-08-22 04:50:24,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:24,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619690861] [2020-08-22 04:50:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:24,738 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:50:24,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:24,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619690861] [2020-08-22 04:50:24,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:24,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:50:24,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517182507] [2020-08-22 04:50:24,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:50:24,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:24,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:50:24,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:24,788 INFO L87 Difference]: Start difference. First operand 6196 states and 9197 transitions. Second operand 4 states. [2020-08-22 04:50:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:28,081 INFO L93 Difference]: Finished difference Result 16495 states and 24448 transitions. [2020-08-22 04:50:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:50:28,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-08-22 04:50:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:28,108 INFO L225 Difference]: With dead ends: 16495 [2020-08-22 04:50:28,108 INFO L226 Difference]: Without dead ends: 10615 [2020-08-22 04:50:28,121 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 [2020-08-22 04:50:28,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2020-08-22 04:50:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10569. [2020-08-22 04:50:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-22 04:50:28,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15484 transitions. [2020-08-22 04:50:28,554 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15484 transitions. Word has length 150 [2020-08-22 04:50:28,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:28,555 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15484 transitions. [2020-08-22 04:50:28,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:50:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15484 transitions. [2020-08-22 04:50:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-22 04:50:28,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:28,569 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] [2020-08-22 04:50:28,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:50:28,570 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:28,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:28,570 INFO L82 PathProgramCache]: Analyzing trace with hash 251552574, now seen corresponding path program 1 times [2020-08-22 04:50:28,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:28,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388263010] [2020-08-22 04:50:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:29,121 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:50:29,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:29,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388263010] [2020-08-22 04:50:29,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:29,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:50:29,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59996407] [2020-08-22 04:50:29,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:50:29,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:29,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:50:29,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:50:29,170 INFO L87 Difference]: Start difference. First operand 10569 states and 15484 transitions. Second operand 5 states. [2020-08-22 04:50:31,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:31,413 INFO L93 Difference]: Finished difference Result 21564 states and 31467 transitions. [2020-08-22 04:50:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:50:31,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-22 04:50:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:31,434 INFO L225 Difference]: With dead ends: 21564 [2020-08-22 04:50:31,435 INFO L226 Difference]: Without dead ends: 10851 [2020-08-22 04:50:31,454 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 [2020-08-22 04:50:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-22 04:50:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10805. [2020-08-22 04:50:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10805 states. [2020-08-22 04:50:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10805 states to 10805 states and 15660 transitions. [2020-08-22 04:50:32,003 INFO L78 Accepts]: Start accepts. Automaton has 10805 states and 15660 transitions. Word has length 150 [2020-08-22 04:50:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:32,004 INFO L479 AbstractCegarLoop]: Abstraction has 10805 states and 15660 transitions. [2020-08-22 04:50:32,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:50:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 10805 states and 15660 transitions. [2020-08-22 04:50:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-22 04:50:32,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:32,019 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] [2020-08-22 04:50:32,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 04:50:32,020 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1535594178, now seen corresponding path program 1 times [2020-08-22 04:50:32,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:32,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2816066] [2020-08-22 04:50:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:32,408 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:50:32,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:32,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2816066] [2020-08-22 04:50:32,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:32,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:50:32,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886395443] [2020-08-22 04:50:32,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:50:32,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:32,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:50:32,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:50:32,491 INFO L87 Difference]: Start difference. First operand 10805 states and 15660 transitions. Second operand 5 states. [2020-08-22 04:50:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:35,825 INFO L93 Difference]: Finished difference Result 15230 states and 22013 transitions. [2020-08-22 04:50:35,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:50:35,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-22 04:50:35,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:35,843 INFO L225 Difference]: With dead ends: 15230 [2020-08-22 04:50:35,844 INFO L226 Difference]: Without dead ends: 10851 [2020-08-22 04:50:35,854 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 [2020-08-22 04:50:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-22 04:50:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10569. [2020-08-22 04:50:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-22 04:50:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15362 transitions. [2020-08-22 04:50:36,432 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15362 transitions. Word has length 150 [2020-08-22 04:50:36,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:36,432 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15362 transitions. [2020-08-22 04:50:36,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:50:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15362 transitions. [2020-08-22 04:50:36,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-22 04:50:36,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:36,444 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] [2020-08-22 04:50:36,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 04:50:36,444 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:36,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1232731994, now seen corresponding path program 1 times [2020-08-22 04:50:36,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:36,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047445084] [2020-08-22 04:50:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:36,909 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:50:36,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:36,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047445084] [2020-08-22 04:50:36,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:36,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:50:36,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351007193] [2020-08-22 04:50:36,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:50:36,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:36,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:50:36,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:36,948 INFO L87 Difference]: Start difference. First operand 10569 states and 15362 transitions. Second operand 4 states. [2020-08-22 04:50:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:40,964 INFO L93 Difference]: Finished difference Result 25409 states and 36872 transitions. [2020-08-22 04:50:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:50:40,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-08-22 04:50:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:40,992 INFO L225 Difference]: With dead ends: 25409 [2020-08-22 04:50:40,992 INFO L226 Difference]: Without dead ends: 21030 [2020-08-22 04:50:41,003 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 [2020-08-22 04:50:41,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21030 states. [2020-08-22 04:50:41,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21030 to 10577. [2020-08-22 04:50:41,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10577 states. [2020-08-22 04:50:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 15370 transitions. [2020-08-22 04:50:41,519 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 15370 transitions. Word has length 151 [2020-08-22 04:50:41,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:41,519 INFO L479 AbstractCegarLoop]: Abstraction has 10577 states and 15370 transitions. [2020-08-22 04:50:41,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:50:41,519 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 15370 transitions. [2020-08-22 04:50:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-22 04:50:41,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:41,528 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] [2020-08-22 04:50:41,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 04:50:41,528 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:41,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:41,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1234425885, now seen corresponding path program 1 times [2020-08-22 04:50:41,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:41,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776383603] [2020-08-22 04:50:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:41,883 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:50:41,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:41,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776383603] [2020-08-22 04:50:41,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:41,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:50:41,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133808519] [2020-08-22 04:50:41,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:50:41,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:41,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:50:41,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:50:41,939 INFO L87 Difference]: Start difference. First operand 10577 states and 15370 transitions. Second operand 5 states. [2020-08-22 04:50:45,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:45,706 INFO L93 Difference]: Finished difference Result 30843 states and 44647 transitions. [2020-08-22 04:50:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:50:45,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-22 04:50:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:45,729 INFO L225 Difference]: With dead ends: 30843 [2020-08-22 04:50:45,729 INFO L226 Difference]: Without dead ends: 20313 [2020-08-22 04:50:45,746 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 [2020-08-22 04:50:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20313 states. [2020-08-22 04:50:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20313 to 20283. [2020-08-22 04:50:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20283 states. [2020-08-22 04:50:46,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 29041 transitions. [2020-08-22 04:50:46,581 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 29041 transitions. Word has length 152 [2020-08-22 04:50:46,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:46,581 INFO L479 AbstractCegarLoop]: Abstraction has 20283 states and 29041 transitions. [2020-08-22 04:50:46,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:50:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 29041 transitions. [2020-08-22 04:50:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-22 04:50:46,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:46,596 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] [2020-08-22 04:50:46,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 04:50:46,596 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:46,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:46,597 INFO L82 PathProgramCache]: Analyzing trace with hash -695536157, now seen corresponding path program 1 times [2020-08-22 04:50:46,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:46,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114332926] [2020-08-22 04:50:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:47,023 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-22 04:50:47,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:47,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114332926] [2020-08-22 04:50:47,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:47,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:50:47,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647835570] [2020-08-22 04:50:47,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:50:47,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:47,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:50:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:50:47,124 INFO L87 Difference]: Start difference. First operand 20283 states and 29041 transitions. Second operand 5 states.