/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --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.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:41:42,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:41:42,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:41:42,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:41:42,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:41:42,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:41:42,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:41:42,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:41:42,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:41:42,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:41:42,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:41:42,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:41:42,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:41:42,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:41:42,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:41:42,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:41:42,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:41:42,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:41:42,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:41:42,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:41:42,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:41:42,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:41:42,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:41:42,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:41:42,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:41:42,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:41:42,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:41:42,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:41:42,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:41:42,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:41:42,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:41:42,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:41:42,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:41:42,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:41:42,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:41:42,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:41:42,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:41:42,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:41:42,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:41:42,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:41:42,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:41:42,583 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 13:41:42,628 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:41:42,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:41:42,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:41:42,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:41:42,631 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:41:42,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:41:42,632 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:41:42,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:41:42,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:41:42,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:41:42,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:41:42,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:41:42,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:41:42,635 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:41:42,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:41:42,635 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:41:42,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:41:42,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:41:42,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:41:42,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:41:42,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:41:42,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:41:42,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:41:42,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:41:42,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:41:42,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:41:42,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:41:42,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:41:42,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:41:42,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:41:43,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:41:43,116 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:41:43,120 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:41:43,122 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:41:43,123 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:41:43,124 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 13:41:43,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93fbeb783/78f024d2a5a24829830c2cc2f8975e91/FLAG2b4dcaed5 [2020-09-25 13:41:43,875 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:41:43,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 13:41:43,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93fbeb783/78f024d2a5a24829830c2cc2f8975e91/FLAG2b4dcaed5 [2020-09-25 13:41:44,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93fbeb783/78f024d2a5a24829830c2cc2f8975e91 [2020-09-25 13:41:44,107 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:41:44,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:41:44,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:41:44,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:41:44,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:41:44,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:41:44" (1/1) ... [2020-09-25 13:41:44,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625d319a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:44, skipping insertion in model container [2020-09-25 13:41:44,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:41:44" (1/1) ... [2020-09-25 13:41:44,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:41:44,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:41:44,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:41:44,949 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:41:45,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:41:45,524 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:41:45,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:45 WrapperNode [2020-09-25 13:41:45,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:41:45,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:41:45,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:41:45,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:41:45,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:45" (1/1) ... [2020-09-25 13:41:45,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:45" (1/1) ... [2020-09-25 13:41:45,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:45" (1/1) ... [2020-09-25 13:41:45,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:45" (1/1) ... [2020-09-25 13:41:45,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:45" (1/1) ... [2020-09-25 13:41:45,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:45" (1/1) ... [2020-09-25 13:41:45,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:45" (1/1) ... [2020-09-25 13:41:45,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:41:45,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:41:45,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:41:45,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:41:45,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:45" (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 13:41:45,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:41:45,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:41:45,765 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 13:41:45,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:41:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:41:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 13:41:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 13:41:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 13:41:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 13:41:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 13:41:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 13:41:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 13:41:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 13:41:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 13:41:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 13:41:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 13:41:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 13:41:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:41:45,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:41:45,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:41:47,845 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:41:47,845 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 13:41:47,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:41:47 BoogieIcfgContainer [2020-09-25 13:41:47,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:41:47,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:41:47,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:41:47,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:41:47,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:41:44" (1/3) ... [2020-09-25 13:41:47,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a4a839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:41:47, skipping insertion in model container [2020-09-25 13:41:47,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:45" (2/3) ... [2020-09-25 13:41:47,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a4a839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:41:47, skipping insertion in model container [2020-09-25 13:41:47,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:41:47" (3/3) ... [2020-09-25 13:41:47,877 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 13:41:47,890 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:41:47,906 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 13:41:47,928 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 13:41:47,963 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:41:47,963 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:41:47,963 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:41:47,963 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:41:47,963 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:41:47,964 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:41:47,964 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:41:47,964 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:41:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states. [2020-09-25 13:41:48,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-25 13:41:48,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:41:48,048 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] [2020-09-25 13:41:48,049 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:41:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:41:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash -219806221, now seen corresponding path program 1 times [2020-09-25 13:41:48,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:41:48,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309789792] [2020-09-25 13:41:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:41:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:41:48,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:41:49,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:41:49,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:41:49,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:41:49,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:41:50,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:41:50,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:41:53,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:41:53,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-25 13:41:53,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:41:53,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-09-25 13:41:53,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:41:53,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:41:53,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:41:53,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-09-25 13:41:53,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-25 13:41:53,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 13:41:54,334 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 13:41:54,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:41:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:41:54,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:41:54,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:41:54,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 13:41:54,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:41:54,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-25 13:41:54,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:41:54,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:41:54,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:41:54,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:41:54,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:41:54,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:41:54,702 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 13:41:54,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309789792] [2020-09-25 13:41:54,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:41:54,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:41:54,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855704672] [2020-09-25 13:41:54,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:41:54,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:41:54,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:41:54,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:41:54,740 INFO L87 Difference]: Start difference. First operand 1127 states. Second operand 4 states. [2020-09-25 13:41:59,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:41:59,396 INFO L93 Difference]: Finished difference Result 1833 states and 2360 transitions. [2020-09-25 13:41:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 13:41:59,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 423 [2020-09-25 13:41:59,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:41:59,431 INFO L225 Difference]: With dead ends: 1833 [2020-09-25 13:41:59,431 INFO L226 Difference]: Without dead ends: 1303 [2020-09-25 13:41:59,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:41:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2020-09-25 13:41:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1296. [2020-09-25 13:41:59,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2020-09-25 13:41:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1545 transitions. [2020-09-25 13:41:59,571 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1545 transitions. Word has length 423 [2020-09-25 13:41:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:41:59,574 INFO L479 AbstractCegarLoop]: Abstraction has 1296 states and 1545 transitions. [2020-09-25 13:41:59,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:41:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1545 transitions. [2020-09-25 13:41:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-25 13:41:59,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:41:59,585 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] [2020-09-25 13:41:59,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:41:59,585 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:41:59,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:41:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash -74379501, now seen corresponding path program 1 times [2020-09-25 13:41:59,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:41:59,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136730378] [2020-09-25 13:41:59,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:41:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:41:59,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:00,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:00,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:00,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:00,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:00,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:03,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:04,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:04,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:04,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:04,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-25 13:42:04,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 13:42:04,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-09-25 13:42:04,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:04,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:04,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:42:04,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-09-25 13:42:04,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-25 13:42:04,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:42:05,232 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 13:42:05,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:42:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:05,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:05,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:05,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 13:42:05,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:42:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-25 13:42:05,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:05,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:05,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:42:05,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:42:05,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:42:05,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:05,633 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 13:42:05,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136730378] [2020-09-25 13:42:05,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:42:05,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:42:05,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451064252] [2020-09-25 13:42:05,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:42:05,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:42:05,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:42:05,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:42:05,638 INFO L87 Difference]: Start difference. First operand 1296 states and 1545 transitions. Second operand 5 states. [2020-09-25 13:42:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:42:11,204 INFO L93 Difference]: Finished difference Result 3439 states and 4147 transitions. [2020-09-25 13:42:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:42:11,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 423 [2020-09-25 13:42:11,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:42:11,216 INFO L225 Difference]: With dead ends: 3439 [2020-09-25 13:42:11,217 INFO L226 Difference]: Without dead ends: 2342 [2020-09-25 13:42:11,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:42:11,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2020-09-25 13:42:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2220. [2020-09-25 13:42:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2220 states. [2020-09-25 13:42:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 2679 transitions. [2020-09-25 13:42:11,299 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 2679 transitions. Word has length 423 [2020-09-25 13:42:11,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:42:11,300 INFO L479 AbstractCegarLoop]: Abstraction has 2220 states and 2679 transitions. [2020-09-25 13:42:11,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:42:11,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 2679 transitions. [2020-09-25 13:42:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-09-25 13:42:11,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:42:11,312 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] [2020-09-25 13:42:11,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:42:11,312 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:42:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:42:11,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2123239659, now seen corresponding path program 1 times [2020-09-25 13:42:11,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:42:11,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765719309] [2020-09-25 13:42:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:42:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:11,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:11,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:11,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:11,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:12,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:12,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:14,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:15,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:16,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:16,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 431 [2020-09-25 13:42:16,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:42:16,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-09-25 13:42:16,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:16,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:16,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:42:16,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-09-25 13:42:16,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-09-25 13:42:16,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:16,925 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 13:42:16,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:42:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:16,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:16,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:16,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 13:42:16,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:42:16,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-25 13:42:16,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:16,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:16,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:42:16,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:42:16,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:42:16,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:17,223 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 13:42:17,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765719309] [2020-09-25 13:42:17,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:42:17,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:42:17,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841160030] [2020-09-25 13:42:17,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:42:17,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:42:17,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:42:17,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:42:17,226 INFO L87 Difference]: Start difference. First operand 2220 states and 2679 transitions. Second operand 5 states. [2020-09-25 13:42:23,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:42:23,950 INFO L93 Difference]: Finished difference Result 6087 states and 7401 transitions. [2020-09-25 13:42:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:42:23,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 424 [2020-09-25 13:42:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:42:23,970 INFO L225 Difference]: With dead ends: 6087 [2020-09-25 13:42:23,970 INFO L226 Difference]: Without dead ends: 4141 [2020-09-25 13:42:23,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:42:23,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2020-09-25 13:42:24,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 4028. [2020-09-25 13:42:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4028 states. [2020-09-25 13:42:24,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 4884 transitions. [2020-09-25 13:42:24,148 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 4884 transitions. Word has length 424 [2020-09-25 13:42:24,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:42:24,149 INFO L479 AbstractCegarLoop]: Abstraction has 4028 states and 4884 transitions. [2020-09-25 13:42:24,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:42:24,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 4884 transitions. [2020-09-25 13:42:24,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-09-25 13:42:24,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:42:24,167 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] [2020-09-25 13:42:24,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:42:24,168 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:42:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:42:24,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1833176661, now seen corresponding path program 1 times [2020-09-25 13:42:24,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:42:24,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749348250] [2020-09-25 13:42:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:42:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:24,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:24,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:24,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:24,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:24,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:25,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:26,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:26,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:29,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:29,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 432 [2020-09-25 13:42:29,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:42:29,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-09-25 13:42:29,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:29,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:42:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-09-25 13:42:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-25 13:42:29,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:29,684 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 13:42:29,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:42:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:29,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:29,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:29,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 13:42:29,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:42:29,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 13:42:29,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:29,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:29,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:42:29,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:42:29,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:42:29,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:29,911 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 13:42:29,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749348250] [2020-09-25 13:42:29,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:42:29,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:42:29,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020433863] [2020-09-25 13:42:29,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:42:29,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:42:29,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:42:29,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:42:29,913 INFO L87 Difference]: Start difference. First operand 4028 states and 4884 transitions. Second operand 5 states.