/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:46:12,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:46:12,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:46:12,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:46:12,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:46:12,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:46:12,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:46:12,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:46:12,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:46:12,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:46:12,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:46:12,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:46:12,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:46:12,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:46:12,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:46:12,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:46:12,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:46:12,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:46:12,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:46:12,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:46:12,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:46:12,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:46:12,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:46:12,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:46:12,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:46:12,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:46:12,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:46:12,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:46:12,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:46:12,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:46:12,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:46:12,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:46:12,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:46:12,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:46:12,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:46:12,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:46:12,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:46:12,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:46:12,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:46:12,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:46:12,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:46:12,477 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 05:46:12,504 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:46:12,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:46:12,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:46:12,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:46:12,507 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:46:12,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:46:12,507 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:46:12,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:46:12,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:46:12,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:46:12,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:46:12,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:46:12,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:46:12,508 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:46:12,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:46:12,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:46:12,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:46:12,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:46:12,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:46:12,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:46:12,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:46:12,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:46:12,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:46:12,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:46:12,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:46:12,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:46:12,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:46:12,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:46:12,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:46:12,512 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:46:12,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:46:13,022 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:46:13,027 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:46:13,030 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:46:13,031 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:46:13,032 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 05:46:13,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e74dd30cf/3a6a34e102f24d218a95cce612c7e885/FLAG6f1f32708 [2020-09-25 05:46:13,788 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:46:13,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 05:46:13,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e74dd30cf/3a6a34e102f24d218a95cce612c7e885/FLAG6f1f32708 [2020-09-25 05:46:14,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e74dd30cf/3a6a34e102f24d218a95cce612c7e885 [2020-09-25 05:46:14,047 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:46:14,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:46:14,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:46:14,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:46:14,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:46:14,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:46:14" (1/1) ... [2020-09-25 05:46:14,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32333996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:14, skipping insertion in model container [2020-09-25 05:46:14,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:46:14" (1/1) ... [2020-09-25 05:46:14,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:46:14,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:46:14,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:46:14,848 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:46:15,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:46:15,422 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:46:15,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:15 WrapperNode [2020-09-25 05:46:15,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:46:15,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:46:15,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:46:15,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:46:15,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:15" (1/1) ... [2020-09-25 05:46:15,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:15" (1/1) ... [2020-09-25 05:46:15,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:15" (1/1) ... [2020-09-25 05:46:15,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:15" (1/1) ... [2020-09-25 05:46:15,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:15" (1/1) ... [2020-09-25 05:46:15,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:15" (1/1) ... [2020-09-25 05:46:15,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:15" (1/1) ... [2020-09-25 05:46:15,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:46:15,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:46:15,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:46:15,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:46:15,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:15" (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 05:46:15,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:46:15,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:46:15,726 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 05:46:15,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:46:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:46:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 05:46:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 05:46:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 05:46:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 05:46:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 05:46:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 05:46:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 05:46:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 05:46:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 05:46:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 05:46:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 05:46:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 05:46:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 05:46:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:46:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:46:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:46:17,805 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:46:17,805 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 05:46:17,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:46:17 BoogieIcfgContainer [2020-09-25 05:46:17,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:46:17,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:46:17,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:46:17,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:46:17,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:46:14" (1/3) ... [2020-09-25 05:46:17,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f28ca33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:46:17, skipping insertion in model container [2020-09-25 05:46:17,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:15" (2/3) ... [2020-09-25 05:46:17,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f28ca33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:46:17, skipping insertion in model container [2020-09-25 05:46:17,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:46:17" (3/3) ... [2020-09-25 05:46:17,835 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 05:46:17,847 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:46:17,860 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 05:46:17,885 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 05:46:17,926 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:46:17,926 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:46:17,926 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:46:17,926 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:46:17,926 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:46:17,927 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:46:17,927 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:46:17,927 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:46:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-09-25 05:46:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2020-09-25 05:46:18,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:46:18,014 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] [2020-09-25 05:46:18,015 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:46:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:46:18,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1272027086, now seen corresponding path program 1 times [2020-09-25 05:46:18,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:46:18,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117762690] [2020-09-25 05:46:18,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:46:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:18,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:19,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:19,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:19,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:19,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:19,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:20,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:20,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:23,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:23,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-09-25 05:46:23,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 05:46:23,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-09-25 05:46:23,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:23,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:23,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:46:23,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 199 [2020-09-25 05:46:23,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-09-25 05:46:23,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 05:46:24,300 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-25 05:46:24,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:46:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:24,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:24,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:24,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 05:46:24,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:46:24,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 05:46:24,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:24,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:24,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:46:24,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:46:24,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:46:24,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:46:24,713 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 05:46:24,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117762690] [2020-09-25 05:46:24,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:46:24,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:46:24,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734944005] [2020-09-25 05:46:24,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:46:24,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:46:24,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:46:24,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:46:24,761 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-09-25 05:46:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:46:29,318 INFO L93 Difference]: Finished difference Result 1830 states and 2374 transitions. [2020-09-25 05:46:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:46:29,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 414 [2020-09-25 05:46:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:46:29,353 INFO L225 Difference]: With dead ends: 1830 [2020-09-25 05:46:29,353 INFO L226 Difference]: Without dead ends: 1312 [2020-09-25 05:46:29,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:46:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2020-09-25 05:46:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1303. [2020-09-25 05:46:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1303 states. [2020-09-25 05:46:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1563 transitions. [2020-09-25 05:46:29,488 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1563 transitions. Word has length 414 [2020-09-25 05:46:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:46:29,490 INFO L479 AbstractCegarLoop]: Abstraction has 1303 states and 1563 transitions. [2020-09-25 05:46:29,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:46:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1563 transitions. [2020-09-25 05:46:29,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2020-09-25 05:46:29,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:46:29,507 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] [2020-09-25 05:46:29,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:46:29,507 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:46:29,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:46:29,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1791071559, now seen corresponding path program 1 times [2020-09-25 05:46:29,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:46:29,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650676122] [2020-09-25 05:46:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:46:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:29,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:29,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:30,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:30,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:30,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:30,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:30,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:31,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:34,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:34,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-09-25 05:46:34,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 05:46:34,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 05:46:34,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:34,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:34,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:46:34,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-09-25 05:46:34,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-25 05:46:34,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 05:46:35,308 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-25 05:46:35,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:46:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:35,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:35,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:35,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 05:46:35,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:46:35,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 05:46:35,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:35,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:35,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:46:35,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:46:35,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:46:35,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:46:35,676 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 05:46:35,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650676122] [2020-09-25 05:46:35,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:46:35,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:46:35,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070403459] [2020-09-25 05:46:35,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:46:35,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:46:35,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:46:35,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:46:35,682 INFO L87 Difference]: Start difference. First operand 1303 states and 1563 transitions. Second operand 5 states. [2020-09-25 05:46:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:46:42,971 INFO L93 Difference]: Finished difference Result 3464 states and 4203 transitions. [2020-09-25 05:46:42,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:46:42,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 414 [2020-09-25 05:46:42,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:46:42,985 INFO L225 Difference]: With dead ends: 3464 [2020-09-25 05:46:42,986 INFO L226 Difference]: Without dead ends: 2371 [2020-09-25 05:46:42,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:46:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2020-09-25 05:46:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 2246. [2020-09-25 05:46:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2246 states. [2020-09-25 05:46:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 2730 transitions. [2020-09-25 05:46:43,086 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 2730 transitions. Word has length 414 [2020-09-25 05:46:43,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:46:43,087 INFO L479 AbstractCegarLoop]: Abstraction has 2246 states and 2730 transitions. [2020-09-25 05:46:43,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:46:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 2730 transitions. [2020-09-25 05:46:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2020-09-25 05:46:43,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:46:43,094 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] [2020-09-25 05:46:43,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:46:43,094 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:46:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:46:43,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1512250717, now seen corresponding path program 1 times [2020-09-25 05:46:43,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:46:43,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006571580] [2020-09-25 05:46:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:46:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:43,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:43,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:43,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:43,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:43,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:45,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:47,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:48,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:48,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:48,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 422 [2020-09-25 05:46:48,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:46:48,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-09-25 05:46:48,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:48,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:48,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:46:48,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-09-25 05:46:48,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 05:46:48,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:46:48,571 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-25 05:46:48,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:46:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:48,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:48,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:48,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 05:46:48,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:46:48,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 05:46:48,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:48,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:48,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:46:48,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:46:48,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:46:48,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:46:48,821 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 05:46:48,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006571580] [2020-09-25 05:46:48,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:46:48,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:46:48,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027719262] [2020-09-25 05:46:48,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:46:48,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:46:48,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:46:48,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:46:48,826 INFO L87 Difference]: Start difference. First operand 2246 states and 2730 transitions. Second operand 4 states. [2020-09-25 05:46:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:46:52,903 INFO L93 Difference]: Finished difference Result 6343 states and 7769 transitions. [2020-09-25 05:46:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:46:52,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 415 [2020-09-25 05:46:52,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:46:52,925 INFO L225 Difference]: With dead ends: 6343 [2020-09-25 05:46:52,925 INFO L226 Difference]: Without dead ends: 4310 [2020-09-25 05:46:52,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:46:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2020-09-25 05:46:53,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 2248. [2020-09-25 05:46:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2248 states. [2020-09-25 05:46:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 2732 transitions. [2020-09-25 05:46:53,065 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 2732 transitions. Word has length 415 [2020-09-25 05:46:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:46:53,066 INFO L479 AbstractCegarLoop]: Abstraction has 2248 states and 2732 transitions. [2020-09-25 05:46:53,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:46:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 2732 transitions. [2020-09-25 05:46:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2020-09-25 05:46:53,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:46:53,078 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] [2020-09-25 05:46:53,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:46:53,079 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:46:53,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:46:53,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1261271917, now seen corresponding path program 1 times [2020-09-25 05:46:53,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:46:53,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804452194] [2020-09-25 05:46:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:46:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:53,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:53,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:53,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:53,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:53,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:54,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:56,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:56,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:57,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:57,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:58,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:58,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 423 [2020-09-25 05:46:58,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 05:46:58,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 05:46:58,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:58,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:58,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:46:58,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-09-25 05:46:58,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-09-25 05:46:58,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:46:58,687 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-25 05:46:58,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:46:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:58,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:58,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:58,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 05:46:58,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:46:58,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-25 05:46:58,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:58,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:58,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:46:58,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:46:58,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:46:58,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:46:58,933 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 05:46:58,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804452194] [2020-09-25 05:46:58,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:46:58,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:46:58,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404890422] [2020-09-25 05:46:58,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:46:58,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:46:58,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:46:58,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:46:58,936 INFO L87 Difference]: Start difference. First operand 2248 states and 2732 transitions. Second operand 5 states.