/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --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.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:20:31,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:20:31,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:20:31,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:20:31,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:20:31,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:20:31,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:20:31,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:20:31,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:20:31,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:20:31,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:20:31,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:20:31,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:20:31,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:20:31,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:20:31,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:20:31,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:20:31,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:20:31,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:20:31,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:20:31,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:20:31,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:20:31,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:20:31,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:20:31,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:20:31,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:20:31,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:20:31,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:20:31,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:20:31,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:20:31,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:20:31,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:20:31,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:20:31,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:20:31,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:20:31,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:20:31,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:20:31,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:20:31,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:20:31,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:20:31,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:20:31,110 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 [2020-09-25 10:20:31,157 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:20:31,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:20:31,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:20:31,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:20:31,160 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:20:31,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:20:31,161 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:20:31,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:20:31,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:20:31,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:20:31,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:20:31,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:20:31,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:20:31,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:20:31,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:20:31,164 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:20:31,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:20:31,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:20:31,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:20:31,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:20:31,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:20:31,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:20:31,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:20:31,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:20:31,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:20:31,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:20:31,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:20:31,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:20:31,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:20:31,167 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:20:31,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:20:31,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:20:31,678 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:20:31,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:20:31,681 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:20:31,682 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 10:20:31,780 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0111136f2/25aecb28495147c2a082fc17018e9505/FLAG65c1434a8 [2020-09-25 10:20:32,536 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:20:32,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 10:20:32,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0111136f2/25aecb28495147c2a082fc17018e9505/FLAG65c1434a8 [2020-09-25 10:20:32,673 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0111136f2/25aecb28495147c2a082fc17018e9505 [2020-09-25 10:20:32,686 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:20:32,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:20:32,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:20:32,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:20:32,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:20:32,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:20:32" (1/1) ... [2020-09-25 10:20:32,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d1a539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:32, skipping insertion in model container [2020-09-25 10:20:32,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:20:32" (1/1) ... [2020-09-25 10:20:32,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:20:32,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:20:34,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:20:34,042 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:20:34,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:20:34,493 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:20:34,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:34 WrapperNode [2020-09-25 10:20:34,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:20:34,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:20:34,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:20:34,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:20:34,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:34" (1/1) ... [2020-09-25 10:20:34,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:34" (1/1) ... [2020-09-25 10:20:34,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:34" (1/1) ... [2020-09-25 10:20:34,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:34" (1/1) ... [2020-09-25 10:20:34,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:34" (1/1) ... [2020-09-25 10:20:34,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:34" (1/1) ... [2020-09-25 10:20:34,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:34" (1/1) ... [2020-09-25 10:20:34,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:20:34,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:20:34,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:20:34,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:20:34,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:34" (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 [2020-09-25 10:20:34,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:20:34,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:20:34,781 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 10:20:34,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:20:34,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:20:34,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 10:20:34,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 10:20:34,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 10:20:34,783 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 10:20:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 10:20:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 10:20:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 10:20:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 10:20:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 10:20:34,785 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 10:20:34,786 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 10:20:34,786 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-25 10:20:34,786 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 10:20:34,787 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 10:20:34,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:20:34,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:20:34,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:20:38,165 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:20:38,165 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 10:20:38,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:20:38 BoogieIcfgContainer [2020-09-25 10:20:38,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:20:38,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:20:38,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:20:38,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:20:38,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:20:32" (1/3) ... [2020-09-25 10:20:38,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f98367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:20:38, skipping insertion in model container [2020-09-25 10:20:38,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:20:34" (2/3) ... [2020-09-25 10:20:38,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f98367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:20:38, skipping insertion in model container [2020-09-25 10:20:38,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:20:38" (3/3) ... [2020-09-25 10:20:38,200 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 10:20:38,212 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:20:38,229 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:20:38,252 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:20:38,296 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:20:38,297 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:20:38,297 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:20:38,297 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:20:38,297 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:20:38,297 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:20:38,298 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:20:38,298 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:20:38,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states. [2020-09-25 10:20:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-25 10:20:38,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:20:38,452 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:20:38,453 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:20:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:20:38,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1035850514, now seen corresponding path program 1 times [2020-09-25 10:20:38,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:20:38,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140166533] [2020-09-25 10:20:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:20:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:40,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:40,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:41,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:42,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:42,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:43,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:44,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:44,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:20:44,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-25 10:20:44,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:20:44,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 10:20:44,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:20:44,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:20:44,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:20:44,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 387 [2020-09-25 10:20:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 464 [2020-09-25 10:20:44,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 10:20:46,118 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 10:20:46,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:20:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:46,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:46,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:20:46,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 10:20:46,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:20:46,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-25 10:20:46,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:20:46,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:20:46,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:20:46,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:20:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:20:46,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:20:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:20:47,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140166533] [2020-09-25 10:20:47,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:20:47,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 10:20:47,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781881061] [2020-09-25 10:20:47,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 10:20:47,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:20:47,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 10:20:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:20:47,431 INFO L87 Difference]: Start difference. First operand 2018 states. Second operand 4 states. [2020-09-25 10:20:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:20:57,485 INFO L93 Difference]: Finished difference Result 3594 states and 4750 transitions. [2020-09-25 10:20:57,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 10:20:57,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 920 [2020-09-25 10:20:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:20:57,565 INFO L225 Difference]: With dead ends: 3594 [2020-09-25 10:20:57,565 INFO L226 Difference]: Without dead ends: 2873 [2020-09-25 10:20:57,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:20:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2020-09-25 10:20:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2860. [2020-09-25 10:20:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2860 states. [2020-09-25 10:20:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 3591 transitions. [2020-09-25 10:20:57,863 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 3591 transitions. Word has length 920 [2020-09-25 10:20:57,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:20:57,868 INFO L479 AbstractCegarLoop]: Abstraction has 2860 states and 3591 transitions. [2020-09-25 10:20:57,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 10:20:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 3591 transitions. [2020-09-25 10:20:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-25 10:20:57,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:20:57,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:20:57,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:20:57,976 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:20:57,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:20:57,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1742209874, now seen corresponding path program 1 times [2020-09-25 10:20:57,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:20:57,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425735756] [2020-09-25 10:20:57,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:20:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:20:58,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:59,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:59,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:20:59,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:00,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:00,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:00,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:01,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:01,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:02,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:03,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:03,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:21:03,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-25 10:21:03,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 10:21:03,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-09-25 10:21:03,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:21:03,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:21:03,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 10:21:03,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-09-25 10:21:03,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 260 [2020-09-25 10:21:03,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:21:04,675 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 10:21:04,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:21:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:21:04,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:04,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:21:04,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 10:21:04,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:21:04,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-25 10:21:04,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:21:04,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:21:04,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:21:04,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:21:04,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:21:04,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:21:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:21:05,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425735756] [2020-09-25 10:21:05,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:21:05,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 10:21:05,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169281497] [2020-09-25 10:21:05,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:21:05,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:21:05,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:21:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:21:05,928 INFO L87 Difference]: Start difference. First operand 2860 states and 3591 transitions. Second operand 5 states. [2020-09-25 10:21:19,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:21:19,987 INFO L93 Difference]: Finished difference Result 7848 states and 9978 transitions. [2020-09-25 10:21:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:21:19,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 920 [2020-09-25 10:21:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:21:20,015 INFO L225 Difference]: With dead ends: 7848 [2020-09-25 10:21:20,015 INFO L226 Difference]: Without dead ends: 5308 [2020-09-25 10:21:20,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:21:20,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5308 states. [2020-09-25 10:21:20,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5308 to 5306. [2020-09-25 10:21:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5306 states. [2020-09-25 10:21:20,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5306 states to 5306 states and 6703 transitions. [2020-09-25 10:21:20,227 INFO L78 Accepts]: Start accepts. Automaton has 5306 states and 6703 transitions. Word has length 920 [2020-09-25 10:21:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:21:20,229 INFO L479 AbstractCegarLoop]: Abstraction has 5306 states and 6703 transitions. [2020-09-25 10:21:20,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:21:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5306 states and 6703 transitions. [2020-09-25 10:21:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2020-09-25 10:21:20,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:21:20,247 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:21:20,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:21:20,248 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:21:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:21:20,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1396485109, now seen corresponding path program 1 times [2020-09-25 10:21:20,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:21:20,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323534905] [2020-09-25 10:21:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:21:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:21:20,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:20,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:21,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:22,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:22,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:22,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:21:23,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking...