/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=0.5 --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 14:50:33,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:50:33,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:50:33,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:50:33,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:50:33,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:50:33,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:50:33,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:50:33,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:50:33,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:50:33,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:50:33,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:50:33,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:50:33,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:50:33,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:50:33,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:50:33,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:50:33,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:50:33,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:50:33,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:50:33,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:50:33,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:50:33,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:50:33,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:50:33,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:50:33,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:50:33,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:50:33,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:50:33,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:50:33,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:50:33,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:50:33,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:50:33,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:50:33,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:50:33,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:50:33,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:50:33,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:50:33,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:50:33,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:50:33,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:50:33,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:50:33,188 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 14:50:33,222 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:50:33,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:50:33,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:50:33,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:50:33,224 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:50:33,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:50:33,228 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:50:33,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:50:33,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:50:33,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:50:33,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:50:33,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:50:33,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:50:33,229 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:50:33,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:50:33,230 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:50:33,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:50:33,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:50:33,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:50:33,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:50:33,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:50:33,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:50:33,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:50:33,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:50:33,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:50:33,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:50:33,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:50:33,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:50:33,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:50:33,240 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=0.5;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=0.5;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=0.5;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=0.5;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=0.5;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=0.5;log-additional-information=true; [2020-09-25 14:50:33,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:50:33,783 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:50:33,789 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:50:33,791 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:50:33,795 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:50:33,796 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 14:50:33,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9565b3bc8/9df306c4cb98496c8b8059f060dc2782/FLAG5785e3f47 [2020-09-25 14:50:34,616 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:50:34,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 14:50:34,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9565b3bc8/9df306c4cb98496c8b8059f060dc2782/FLAG5785e3f47 [2020-09-25 14:50:34,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9565b3bc8/9df306c4cb98496c8b8059f060dc2782 [2020-09-25 14:50:34,800 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:50:34,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:50:34,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:50:34,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:50:34,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:50:34,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:50:34" (1/1) ... [2020-09-25 14:50:34,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4147c445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:34, skipping insertion in model container [2020-09-25 14:50:34,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:50:34" (1/1) ... [2020-09-25 14:50:34,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:50:34,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:50:36,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:50:36,195 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:50:36,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:50:36,764 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:50:36,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:36 WrapperNode [2020-09-25 14:50:36,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:50:36,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:50:36,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:50:36,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:50:36,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:36" (1/1) ... [2020-09-25 14:50:36,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:36" (1/1) ... [2020-09-25 14:50:36,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:36" (1/1) ... [2020-09-25 14:50:36,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:36" (1/1) ... [2020-09-25 14:50:36,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:36" (1/1) ... [2020-09-25 14:50:36,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:36" (1/1) ... [2020-09-25 14:50:36,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:36" (1/1) ... [2020-09-25 14:50:36,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:50:36,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:50:36,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:50:36,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:50:36,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:36" (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 14:50:37,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:50:37,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:50:37,113 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 14:50:37,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:50:37,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:50:37,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 14:50:37,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 14:50:37,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 14:50:37,116 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 14:50:37,116 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 14:50:37,116 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 14:50:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 14:50:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 14:50:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 14:50:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 14:50:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 14:50:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-25 14:50:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 14:50:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 14:50:37,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:50:37,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:50:37,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:50:40,820 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:50:40,820 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 14:50:40,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:50:40 BoogieIcfgContainer [2020-09-25 14:50:40,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:50:40,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:50:40,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:50:40,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:50:40,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:50:34" (1/3) ... [2020-09-25 14:50:40,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329d9283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:50:40, skipping insertion in model container [2020-09-25 14:50:40,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:36" (2/3) ... [2020-09-25 14:50:40,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329d9283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:50:40, skipping insertion in model container [2020-09-25 14:50:40,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:50:40" (3/3) ... [2020-09-25 14:50:40,847 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 14:50:40,863 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:50:40,878 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:50:40,905 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:50:40,950 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:50:40,951 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:50:40,951 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:50:40,951 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:50:40,951 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:50:40,952 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:50:40,952 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:50:40,952 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:50:41,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states. [2020-09-25 14:50:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-25 14:50:41,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:50:41,106 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 14:50:41,107 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:50:41,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:50:41,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1035850514, now seen corresponding path program 1 times [2020-09-25 14:50:41,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:50:41,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420878408] [2020-09-25 14:50:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:50:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:42,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:43,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:44,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:45,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:45,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:45,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:46,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:46,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:47,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:47,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-25 14:50:47,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:50:47,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 14:50:47,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:47,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:47,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:50:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 387 [2020-09-25 14:50:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 464 [2020-09-25 14:50:47,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 14:50:48,644 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 14:50:48,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:50:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:48,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:48,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:48,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 14:50:48,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:50:48,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-25 14:50:48,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:48,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:48,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:50:48,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:50:48,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:50:48,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:49,580 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 14:50:49,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420878408] [2020-09-25 14:50:49,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:50:49,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:50:49,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811318260] [2020-09-25 14:50:49,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:50:49,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:50:49,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:50:49,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:50:49,618 INFO L87 Difference]: Start difference. First operand 2018 states. Second operand 4 states. [2020-09-25 14:50:59,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:50:59,658 INFO L93 Difference]: Finished difference Result 3594 states and 4750 transitions. [2020-09-25 14:50:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 14:50:59,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 920 [2020-09-25 14:50:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:50:59,739 INFO L225 Difference]: With dead ends: 3594 [2020-09-25 14:50:59,740 INFO L226 Difference]: Without dead ends: 2873 [2020-09-25 14:50:59,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:50:59,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2020-09-25 14:51:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2860. [2020-09-25 14:51:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2860 states. [2020-09-25 14:51:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 3591 transitions. [2020-09-25 14:51:00,026 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 3591 transitions. Word has length 920 [2020-09-25 14:51:00,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:51:00,031 INFO L479 AbstractCegarLoop]: Abstraction has 2860 states and 3591 transitions. [2020-09-25 14:51:00,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:51:00,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 3591 transitions. [2020-09-25 14:51:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-25 14:51:00,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:51:00,094 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 14:51:00,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:51:00,095 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:51:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:51:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1742209874, now seen corresponding path program 1 times [2020-09-25 14:51:00,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:51:00,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439909766] [2020-09-25 14:51:00,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:51:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:51:00,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:01,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:01,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:02,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:02,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:02,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:03,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:03,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:04,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:04,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:05,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:05,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:51:05,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-25 14:51:05,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 14:51:05,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5137 [2020-09-25 14:51:05,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:51:05,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:51:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:51:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 283 [2020-09-25 14:51:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-09-25 14:51:05,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 14:51:07,384 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 14:51:07,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:51:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:51:07,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:07,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:51:07,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 14:51:07,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:51:07,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-25 14:51:07,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:51:07,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:51:07,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:51:07,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:51:07,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:51:07,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:51:09,187 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 14:51:09,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439909766] [2020-09-25 14:51:09,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:51:09,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:51:09,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853057704] [2020-09-25 14:51:09,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:51:09,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:51:09,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:51:09,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:51:09,199 INFO L87 Difference]: Start difference. First operand 2860 states and 3591 transitions. Second operand 5 states.