/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=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.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:46:12,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:46:12,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:46:12,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:46:13,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:46:13,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:46:13,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:46:13,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:46:13,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:46:13,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:46:13,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:46:13,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:46:13,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:46:13,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:46:13,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:46:13,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:46:13,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:46:13,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:46:13,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:46:13,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:46:13,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:46:13,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:46:13,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:46:13,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:46:13,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:46:13,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:46:13,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:46:13,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:46:13,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:46:13,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:46:13,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:46:13,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:46:13,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:46:13,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:46:13,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:46:13,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:46:13,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:46:13,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:46:13,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:46:13,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:46:13,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:46:13,039 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 [2020-09-24 20:46:13,064 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:46:13,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:46:13,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:46:13,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:46:13,066 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:46:13,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:46:13,066 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:46:13,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:46:13,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:46:13,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:46:13,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:46:13,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:46:13,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:46:13,068 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:46:13,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:46:13,068 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:46:13,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:46:13,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:46:13,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:46:13,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:46:13,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:46:13,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:46:13,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:46:13,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:46:13,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:46:13,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:46:13,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:46:13,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:46:13,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:46:13,071 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:46:13,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:46:13,615 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:46:13,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:46:13,623 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:46:13,624 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:46:13,625 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-24 20:46:13,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba014c21c/9bf10e6bb1c84ecc97ba4026b3b3fc78/FLAG8173b7073 [2020-09-24 20:46:14,541 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:46:14,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-24 20:46:14,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba014c21c/9bf10e6bb1c84ecc97ba4026b3b3fc78/FLAG8173b7073 [2020-09-24 20:46:14,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba014c21c/9bf10e6bb1c84ecc97ba4026b3b3fc78 [2020-09-24 20:46:14,611 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:46:14,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:46:14,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:46:14,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:46:14,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:46:14,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:46:14" (1/1) ... [2020-09-24 20:46:14,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46a9d3e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:14, skipping insertion in model container [2020-09-24 20:46:14,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:46:14" (1/1) ... [2020-09-24 20:46:14,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:46:14,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:46:16,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:46:16,515 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:46:17,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:46:17,705 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:46:17,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17 WrapperNode [2020-09-24 20:46:17,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:46:17,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:46:17,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:46:17,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:46:17,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:46:17,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:46:17,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:46:17,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:46:17,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (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 [2020-09-24 20:46:18,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:46:18,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:46:18,049 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:46:18,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 20:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 20:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 20:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 20:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 20:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 20:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 20:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 20:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-24 20:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-24 20:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 20:46:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 20:46:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:46:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:46:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:46:23,642 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:46:23,643 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:46:23,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:46:23 BoogieIcfgContainer [2020-09-24 20:46:23,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:46:23,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:46:23,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:46:23,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:46:23,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:46:14" (1/3) ... [2020-09-24 20:46:23,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f8952b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:46:23, skipping insertion in model container [2020-09-24 20:46:23,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (2/3) ... [2020-09-24 20:46:23,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f8952b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:46:23, skipping insertion in model container [2020-09-24 20:46:23,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:46:23" (3/3) ... [2020-09-24 20:46:23,682 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-24 20:46:23,696 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:46:23,719 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:46:23,745 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:46:23,794 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:46:23,795 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:46:23,795 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:46:23,795 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:46:23,795 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:46:23,795 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:46:23,795 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:46:23,796 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:46:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3441 states. [2020-09-24 20:46:24,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1429 [2020-09-24 20:46:24,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:46:24,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:46:24,033 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:46:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:46:24,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1246774295, now seen corresponding path program 1 times [2020-09-24 20:46:24,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:46:24,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763110128] [2020-09-24 20:46:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:46:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:46:26,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:27,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:29,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:30,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:30,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:31,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:46:31,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1435 [2020-09-24 20:46:31,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 20:46:31,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5532 [2020-09-24 20:46:31,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:46:31,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:46:31,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 442 [2020-09-24 20:46:31,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 436 [2020-09-24 20:46:31,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:46:34,942 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 403 [2020-09-24 20:46:34,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:46:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:46:34,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:35,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:46:35,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-09-24 20:46:35,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:46:35,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-09-24 20:46:35,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:46:35,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:46:35,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:46:35,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:46:35,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:46:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:46:37,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763110128] [2020-09-24 20:46:37,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:46:37,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:46:37,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718634600] [2020-09-24 20:46:37,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:46:37,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:46:37,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:46:37,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:46:37,125 INFO L87 Difference]: Start difference. First operand 3441 states. Second operand 5 states. [2020-09-24 20:47:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:47:09,799 INFO L93 Difference]: Finished difference Result 9204 states and 12544 transitions. [2020-09-24 20:47:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 20:47:09,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1428 [2020-09-24 20:47:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:47:09,864 INFO L225 Difference]: With dead ends: 9204 [2020-09-24 20:47:09,865 INFO L226 Difference]: Without dead ends: 5923 [2020-09-24 20:47:09,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:47:09,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5923 states. [2020-09-24 20:47:10,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5923 to 5921. [2020-09-24 20:47:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5921 states. [2020-09-24 20:47:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5921 states to 5921 states and 7751 transitions. [2020-09-24 20:47:10,188 INFO L78 Accepts]: Start accepts. Automaton has 5921 states and 7751 transitions. Word has length 1428 [2020-09-24 20:47:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:47:10,191 INFO L479 AbstractCegarLoop]: Abstraction has 5921 states and 7751 transitions. [2020-09-24 20:47:10,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:47:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 5921 states and 7751 transitions. [2020-09-24 20:47:10,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1431 [2020-09-24 20:47:10,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:47:10,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:47:10,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:47:10,317 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:47:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:47:10,318 INFO L82 PathProgramCache]: Analyzing trace with hash 714001108, now seen corresponding path program 1 times [2020-09-24 20:47:10,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:47:10,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3783736] [2020-09-24 20:47:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY