/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:24:59,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:24:59,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:24:59,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 02:24:59,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:24:59,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:24:59,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:24:59,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:24:59,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:24:59,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:24:59,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:24:59,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:24:59,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:24:59,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:24:59,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:24:59,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:24:59,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 02:24:59,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 02:24:59,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 02:24:59,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 02:24:59,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 02:24:59,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 02:24:59,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:24:59,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:24:59,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:24:59,927 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 02:24:59,979 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:24:59,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:24:59,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:24:59,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:24:59,985 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:24:59,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:24:59,985 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:24:59,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:24:59,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:24:59,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:24:59,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:24:59,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:24:59,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:24:59,987 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:24:59,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:24:59,987 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:24:59,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:24:59,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:24:59,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:24:59,988 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:24:59,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:24:59,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:24:59,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:24:59,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:24:59,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:24:59,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:24:59,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:24:59,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:24:59,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:24:59,991 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=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:25:00,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:25:00,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:25:00,327 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:25:00,328 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:25:00,328 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:25:00,329 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-22 02:25:00,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16abbf59a/aa2e1c79498947dbbb90e82a6eb3915f/FLAG95f37c742 [2020-08-22 02:25:01,196 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:25:01,197 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-22 02:25:01,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16abbf59a/aa2e1c79498947dbbb90e82a6eb3915f/FLAG95f37c742 [2020-08-22 02:25:01,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16abbf59a/aa2e1c79498947dbbb90e82a6eb3915f [2020-08-22 02:25:01,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:25:01,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:25:01,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:25:01,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:25:01,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:25:01,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:25:01" (1/1) ... [2020-08-22 02:25:01,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f6f65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:25:01, skipping insertion in model container [2020-08-22 02:25:01,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:25:01" (1/1) ... [2020-08-22 02:25:01,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:25:02,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:25:04,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:25:04,618 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:25:06,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:25:06,417 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:25:06,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:25:06 WrapperNode [2020-08-22 02:25:06,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:25:06,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:25:06,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:25:06,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:25:06,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:25:06" (1/1) ... [2020-08-22 02:25:06,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:25:06" (1/1) ... [2020-08-22 02:25:06,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:25:06" (1/1) ... [2020-08-22 02:25:06,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:25:06" (1/1) ... [2020-08-22 02:25:06,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:25:06" (1/1) ... [2020-08-22 02:25:06,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:25:06" (1/1) ... [2020-08-22 02:25:06,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:25:06" (1/1) ... [2020-08-22 02:25:06,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:25:06,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:25:06,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:25:06,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:25:06,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:25:06" (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 02:25:06,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:25:06,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:25:06,869 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 02:25:06,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:25:06,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:25:06,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 02:25:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 02:25:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 02:25:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 02:25:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 02:25:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 02:25:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 02:25:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 02:25:06,874 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 02:25:06,874 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 02:25:06,875 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 02:25:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-22 02:25:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 02:25:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 02:25:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:25:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:25:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:25:13,134 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:25:13,134 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 02:25:13,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:25:13 BoogieIcfgContainer [2020-08-22 02:25:13,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:25:13,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:25:13,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:25:13,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:25:13,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:25:01" (1/3) ... [2020-08-22 02:25:13,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a50f617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:25:13, skipping insertion in model container [2020-08-22 02:25:13,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:25:06" (2/3) ... [2020-08-22 02:25:13,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a50f617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:25:13, skipping insertion in model container [2020-08-22 02:25:13,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:25:13" (3/3) ... [2020-08-22 02:25:13,163 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-22 02:25:13,173 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:25:13,183 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-22 02:25:13,197 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-22 02:25:13,232 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:25:13,232 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:25:13,232 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:25:13,232 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:25:13,232 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:25:13,232 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:25:13,233 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:25:13,233 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:25:13,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-08-22 02:25:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-08-22 02:25:13,326 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:25:13,327 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] [2020-08-22 02:25:13,328 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:25:13,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:25:13,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-08-22 02:25:13,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:25:13,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077652766] [2020-08-22 02:25:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:25:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:25:15,302 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 409 [2020-08-22 02:25:15,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:25:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:25:15,472 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 02:25:15,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077652766] [2020-08-22 02:25:15,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:25:15,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:25:15,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971857447] [2020-08-22 02:25:15,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:25:15,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:25:15,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:25:15,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:25:15,494 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 5 states. [2020-08-22 02:25:34,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:25:34,346 INFO L93 Difference]: Finished difference Result 4483 states and 7776 transitions. [2020-08-22 02:25:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 02:25:34,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-08-22 02:25:34,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:25:34,386 INFO L225 Difference]: With dead ends: 4483 [2020-08-22 02:25:34,386 INFO L226 Difference]: Without dead ends: 2511 [2020-08-22 02:25:34,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:25:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-08-22 02:25:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-08-22 02:25:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-08-22 02:25:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4317 transitions. [2020-08-22 02:25:34,612 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4317 transitions. Word has length 322 [2020-08-22 02:25:34,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:25:34,616 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4317 transitions. [2020-08-22 02:25:34,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:25:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4317 transitions. [2020-08-22 02:25:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-08-22 02:25:34,640 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:25:34,641 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:34,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:25:34,642 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:25:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:25:34,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1448784548, now seen corresponding path program 1 times [2020-08-22 02:25:34,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:25:34,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696861245] [2020-08-22 02:25:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:25:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:25:36,252 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification that was a NOOP. DAG size: 409 [2020-08-22 02:25:36,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:25:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:25:36,553 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 02:25:36,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696861245] [2020-08-22 02:25:36,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:25:36,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:25:36,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416091752] [2020-08-22 02:25:36,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:25:36,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:25:36,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:25:36,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:25:36,561 INFO L87 Difference]: Start difference. First operand 2511 states and 4317 transitions. Second operand 4 states. [2020-08-22 02:25:37,473 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification that was a NOOP. DAG size: 411