/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=BIGGEST --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 [2020-08-21 17:31:25,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:31:25,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:31:25,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:31:25,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:31:25,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:31:25,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:31:25,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:31:25,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:31:25,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:31:25,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:31:25,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:31:25,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:31:25,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:31:25,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:31:25,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:31:25,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:31:25,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:31:25,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:31:25,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:31:25,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:31:25,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:31:25,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:31:25,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:31:25,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:31:25,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:31:25,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:31:25,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:31:25,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:31:25,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 17:31:25,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:31:25,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:31:25,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:31:25,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 17:31:25,800 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:31:25,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:31:25,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:31:25,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:31:25,802 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:31:25,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:31:25,802 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:31:25,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:31:25,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:31:25,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:31:25,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:31:25,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:31:25,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:31:25,804 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:31:25,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:31:25,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:31:25,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:31:25,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:31:25,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:31:25,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:31:25,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:31:25,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:31:25,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:31:25,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:31:25,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:31:25,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:31:25,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:31:25,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:31:25,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:31:25,807 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=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:31:26,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:31:26,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:31:26,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:31:26,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:31:26,144 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:31:26,144 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-21 17:31:26,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/069cf2856/e081f1ccdd0f49d481d6411582671e2d/FLAGac8c8703c [2020-08-21 17:31:27,012 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:31:27,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-21 17:31:27,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/069cf2856/e081f1ccdd0f49d481d6411582671e2d/FLAGac8c8703c [2020-08-21 17:31:27,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/069cf2856/e081f1ccdd0f49d481d6411582671e2d [2020-08-21 17:31:27,136 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:31:27,137 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:31:27,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:31:27,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:31:27,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:31:27,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:31:27" (1/1) ... [2020-08-21 17:31:27,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693e2903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:31:27, skipping insertion in model container [2020-08-21 17:31:27,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:31:27" (1/1) ... [2020-08-21 17:31:27,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:31:27,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:31:30,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:31:30,052 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:31:32,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:31:32,111 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:31:32,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:31:32 WrapperNode [2020-08-21 17:31:32,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:31:32,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:31:32,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:31:32,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:31:32,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:31:32" (1/1) ... [2020-08-21 17:31:32,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:31:32" (1/1) ... [2020-08-21 17:31:32,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:31:32" (1/1) ... [2020-08-21 17:31:32,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:31:32" (1/1) ... [2020-08-21 17:31:32,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:31:32" (1/1) ... [2020-08-21 17:31:32,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:31:32" (1/1) ... [2020-08-21 17:31:32,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:31:32" (1/1) ... [2020-08-21 17:31:32,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:31:32,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:31:32,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:31:32,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:31:32,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:31:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:31:32,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:31:32,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:31:32,508 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 17:31:32,508 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:31:32,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:31:32,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 17:31:32,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 17:31:32,509 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 17:31:32,509 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 17:31:32,510 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 17:31:32,510 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 17:31:32,510 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 17:31:32,510 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 17:31:32,510 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 17:31:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 17:31:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-21 17:31:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-21 17:31:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 17:31:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 17:31:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:31:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:31:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:31:38,515 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:31:38,515 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 17:31:38,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:31:38 BoogieIcfgContainer [2020-08-21 17:31:38,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:31:38,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:31:38,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:31:38,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:31:38,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:31:27" (1/3) ... [2020-08-21 17:31:38,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130b4ed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:31:38, skipping insertion in model container [2020-08-21 17:31:38,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:31:32" (2/3) ... [2020-08-21 17:31:38,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130b4ed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:31:38, skipping insertion in model container [2020-08-21 17:31:38,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:31:38" (3/3) ... [2020-08-21 17:31:38,548 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-21 17:31:38,562 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:31:38,575 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-21 17:31:38,590 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-21 17:31:38,626 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:31:38,626 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:31:38,626 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:31:38,627 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:31:38,627 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:31:38,627 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:31:38,627 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:31:38,627 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:31:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-08-21 17:31:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-08-21 17:31:38,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:31:38,751 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] [2020-08-21 17:31:38,752 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:31:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:31:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-08-21 17:31:38,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:31:38,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129692016] [2020-08-21 17:31:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:31:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:31:40,831 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 409 [2020-08-21 17:31:40,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:31:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:31:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:31:41,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129692016] [2020-08-21 17:31:41,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:31:41,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:31:41,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331009166] [2020-08-21 17:31:41,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:31:41,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:31:41,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:31:41,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:31:41,061 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 5 states. [2020-08-21 17:31:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:31:58,012 INFO L93 Difference]: Finished difference Result 4483 states and 7776 transitions. [2020-08-21 17:31:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:31:58,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-08-21 17:31:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:31:58,067 INFO L225 Difference]: With dead ends: 4483 [2020-08-21 17:31:58,068 INFO L226 Difference]: Without dead ends: 2511 [2020-08-21 17:31:58,088 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 [2020-08-21 17:31:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-08-21 17:31:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-08-21 17:31:58,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-08-21 17:31:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4317 transitions. [2020-08-21 17:31:58,322 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4317 transitions. Word has length 322 [2020-08-21 17:31:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:31:58,326 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4317 transitions. [2020-08-21 17:31:58,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:31:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4317 transitions. [2020-08-21 17:31:58,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-08-21 17:31:58,342 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:31:58,343 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] [2020-08-21 17:31:58,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:31:58,344 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:31:58,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:31:58,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1448784548, now seen corresponding path program 1 times [2020-08-21 17:31:58,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:31:58,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887219373] [2020-08-21 17:31:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:31:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:31:59,973 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 409 [2020-08-21 17:31:59,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:31:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:32:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:32:00,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887219373] [2020-08-21 17:32:00,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:32:00,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:32:00,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034123952] [2020-08-21 17:32:00,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:32:00,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:32:00,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:32:00,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:32:00,207 INFO L87 Difference]: Start difference. First operand 2511 states and 4317 transitions. Second operand 4 states. [2020-08-21 17:32:00,995 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 411