/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=0.8 --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 08:04:12,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:04:12,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:04:12,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:04:12,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:04:12,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:04:12,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:04:12,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:04:12,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:04:12,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:04:12,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:04:12,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:04:12,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:04:12,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:04:12,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:04:12,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:04:12,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:04:12,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:04:12,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:04:12,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:04:12,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:04:12,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:04:12,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:04:12,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:04:12,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:04:12,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:04:12,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:04:12,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:04:12,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:04:12,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:04:12,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:04:12,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:04:12,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:04:12,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:04:12,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:04:12,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:04:12,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:04:12,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:04:12,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:04:12,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:04:12,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:04:12,457 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 08:04:12,503 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:04:12,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:04:12,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:04:12,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:04:12,507 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:04:12,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:04:12,507 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:04:12,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:04:12,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:04:12,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:04:12,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:04:12,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:04:12,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:04:12,509 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:04:12,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:04:12,510 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:04:12,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:04:12,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:04:12,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:04:12,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:04:12,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:04:12,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:04:12,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:04:12,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:04:12,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:04:12,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:04:12,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:04:12,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:04:12,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:04:12,513 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=0.8;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=0.8;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=0.8;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=0.8;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=0.8;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=0.8;log-additional-information=true; [2020-09-25 08:04:12,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:04:13,012 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:04:13,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:04:13,019 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:04:13,020 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:04:13,021 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 08:04:13,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5412c7fdd/9a4d2f9488324103be9b4a928b1a7aaf/FLAG2a8dbe57e [2020-09-25 08:04:13,773 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:04:13,774 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 08:04:13,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5412c7fdd/9a4d2f9488324103be9b4a928b1a7aaf/FLAG2a8dbe57e [2020-09-25 08:04:14,029 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5412c7fdd/9a4d2f9488324103be9b4a928b1a7aaf [2020-09-25 08:04:14,042 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:04:14,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:04:14,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:04:14,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:04:14,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:04:14,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:04:14" (1/1) ... [2020-09-25 08:04:14,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217a2c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:14, skipping insertion in model container [2020-09-25 08:04:14,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:04:14" (1/1) ... [2020-09-25 08:04:14,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:04:14,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:04:14,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:04:14,804 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:04:15,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:04:15,283 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:04:15,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:15 WrapperNode [2020-09-25 08:04:15,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:04:15,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:04:15,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:04:15,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:04:15,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:15" (1/1) ... [2020-09-25 08:04:15,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:15" (1/1) ... [2020-09-25 08:04:15,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:15" (1/1) ... [2020-09-25 08:04:15,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:15" (1/1) ... [2020-09-25 08:04:15,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:15" (1/1) ... [2020-09-25 08:04:15,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:15" (1/1) ... [2020-09-25 08:04:15,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:15" (1/1) ... [2020-09-25 08:04:15,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:04:15,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:04:15,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:04:15,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:04:15,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:15" (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 08:04:15,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:04:15,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:04:15,512 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 08:04:15,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:04:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:04:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 08:04:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 08:04:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 08:04:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 08:04:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 08:04:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 08:04:15,516 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 08:04:15,516 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 08:04:15,516 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 08:04:15,516 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 08:04:15,517 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 08:04:15,518 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 08:04:15,518 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 08:04:15,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:04:15,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:04:15,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:04:17,605 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:04:17,605 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 08:04:17,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:04:17 BoogieIcfgContainer [2020-09-25 08:04:17,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:04:17,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:04:17,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:04:17,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:04:17,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:04:14" (1/3) ... [2020-09-25 08:04:17,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d6e0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:04:17, skipping insertion in model container [2020-09-25 08:04:17,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:15" (2/3) ... [2020-09-25 08:04:17,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d6e0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:04:17, skipping insertion in model container [2020-09-25 08:04:17,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:04:17" (3/3) ... [2020-09-25 08:04:17,628 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 08:04:17,642 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:04:17,653 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 08:04:17,675 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 08:04:17,710 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:04:17,710 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:04:17,710 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:04:17,711 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:04:17,711 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:04:17,711 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:04:17,711 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:04:17,711 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:04:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-09-25 08:04:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2020-09-25 08:04:17,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:04:17,793 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 08:04:17,794 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:04:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:04:17,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1272027086, now seen corresponding path program 1 times [2020-09-25 08:04:17,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:04:17,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628489548] [2020-09-25 08:04:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:04:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:18,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:18,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:19,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:19,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:19,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:19,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:20,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:20,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:23,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:23,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-09-25 08:04:23,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 08:04:23,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 08:04:23,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:23,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:23,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:04:23,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 199 [2020-09-25 08:04:23,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-09-25 08:04:23,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 08:04:23,946 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-25 08:04:23,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:04:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:23,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:24,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:24,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 08:04:24,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:04:24,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-25 08:04:24,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:24,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:04:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:04:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:04:24,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:04:24,288 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 08:04:24,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628489548] [2020-09-25 08:04:24,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:04:24,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:04:24,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99233463] [2020-09-25 08:04:24,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:04:24,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:04:24,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:04:24,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:04:24,336 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-09-25 08:04:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:04:28,857 INFO L93 Difference]: Finished difference Result 1830 states and 2374 transitions. [2020-09-25 08:04:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 08:04:28,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 414 [2020-09-25 08:04:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:04:28,891 INFO L225 Difference]: With dead ends: 1830 [2020-09-25 08:04:28,891 INFO L226 Difference]: Without dead ends: 1312 [2020-09-25 08:04:28,899 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 08:04:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2020-09-25 08:04:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1303. [2020-09-25 08:04:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1303 states. [2020-09-25 08:04:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1563 transitions. [2020-09-25 08:04:29,028 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1563 transitions. Word has length 414 [2020-09-25 08:04:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:04:29,030 INFO L479 AbstractCegarLoop]: Abstraction has 1303 states and 1563 transitions. [2020-09-25 08:04:29,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:04:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1563 transitions. [2020-09-25 08:04:29,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2020-09-25 08:04:29,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:04:29,042 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 08:04:29,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:04:29,043 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:04:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:04:29,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1791071559, now seen corresponding path program 1 times [2020-09-25 08:04:29,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:04:29,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592307967] [2020-09-25 08:04:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:04:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:29,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:29,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:29,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:29,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:29,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:29,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:30,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:30,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:34,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:34,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-09-25 08:04:34,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 08:04:34,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-09-25 08:04:34,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:34,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:04:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-09-25 08:04:34,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-25 08:04:34,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 08:04:34,905 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-25 08:04:34,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:04:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:34,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:34,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:34,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 08:04:34,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:04:34,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-25 08:04:34,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:34,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:34,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:04:34,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:04:34,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:04:34,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:04:35,522 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 08:04:35,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592307967] [2020-09-25 08:04:35,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:04:35,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:04:35,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173563497] [2020-09-25 08:04:35,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:04:35,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:04:35,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:04:35,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:04:35,531 INFO L87 Difference]: Start difference. First operand 1303 states and 1563 transitions. Second operand 5 states. [2020-09-25 08:04:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:04:42,049 INFO L93 Difference]: Finished difference Result 3464 states and 4203 transitions. [2020-09-25 08:04:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:04:42,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 414 [2020-09-25 08:04:42,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:04:42,062 INFO L225 Difference]: With dead ends: 3464 [2020-09-25 08:04:42,062 INFO L226 Difference]: Without dead ends: 2371 [2020-09-25 08:04:42,068 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 08:04:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2020-09-25 08:04:42,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 2246. [2020-09-25 08:04:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2246 states. [2020-09-25 08:04:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 2730 transitions. [2020-09-25 08:04:42,153 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 2730 transitions. Word has length 414 [2020-09-25 08:04:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:04:42,154 INFO L479 AbstractCegarLoop]: Abstraction has 2246 states and 2730 transitions. [2020-09-25 08:04:42,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:04:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 2730 transitions. [2020-09-25 08:04:42,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2020-09-25 08:04:42,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:04:42,160 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 08:04:42,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:04:42,161 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:04:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:04:42,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1512250717, now seen corresponding path program 1 times [2020-09-25 08:04:42,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:04:42,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685323842] [2020-09-25 08:04:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:04:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:42,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:42,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:42,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:42,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:42,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:42,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:44,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:46,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:46,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:47,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:47,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 422 [2020-09-25 08:04:47,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 08:04:47,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-09-25 08:04:47,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:47,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:47,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:04:47,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-09-25 08:04:47,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 08:04:47,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:04:47,669 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-25 08:04:47,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:04:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:47,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:47,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:47,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 08:04:47,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:04:47,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 08:04:47,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:47,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:47,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:04:47,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:04:47,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:04:47,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:04:47,951 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 08:04:47,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685323842] [2020-09-25 08:04:47,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:04:47,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:04:47,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183330535] [2020-09-25 08:04:47,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:04:47,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:04:47,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:04:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:04:47,954 INFO L87 Difference]: Start difference. First operand 2246 states and 2730 transitions. Second operand 5 states. [2020-09-25 08:04:53,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:04:53,503 INFO L93 Difference]: Finished difference Result 6208 states and 7594 transitions. [2020-09-25 08:04:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:04:53,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 415 [2020-09-25 08:04:53,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:04:53,523 INFO L225 Difference]: With dead ends: 6208 [2020-09-25 08:04:53,523 INFO L226 Difference]: Without dead ends: 4164 [2020-09-25 08:04:53,528 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 08:04:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2020-09-25 08:04:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 4056. [2020-09-25 08:04:53,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4056 states. [2020-09-25 08:04:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4056 states to 4056 states and 4949 transitions. [2020-09-25 08:04:53,675 INFO L78 Accepts]: Start accepts. Automaton has 4056 states and 4949 transitions. Word has length 415 [2020-09-25 08:04:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:04:53,677 INFO L479 AbstractCegarLoop]: Abstraction has 4056 states and 4949 transitions. [2020-09-25 08:04:53,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:04:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4056 states and 4949 transitions. [2020-09-25 08:04:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2020-09-25 08:04:53,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:04:53,689 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 08:04:53,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:04:53,690 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:04:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:04:53,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1711630169, now seen corresponding path program 1 times [2020-09-25 08:04:53,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:04:53,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204803582] [2020-09-25 08:04:53,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:04:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:53,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:53,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:54,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:54,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:54,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:55,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:55,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:55,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:58,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:58,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 423 [2020-09-25 08:04:58,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 08:04:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 08:04:58,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:58,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:04:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-09-25 08:04:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-25 08:04:58,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:04:59,189 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-25 08:04:59,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:04:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:59,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:59,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:59,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 08:04:59,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:04:59,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 08:04:59,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:59,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:59,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:04:59,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:04:59,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:04:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:04:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:04:59,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204803582] [2020-09-25 08:04:59,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:04:59,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:04:59,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997207244] [2020-09-25 08:04:59,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:04:59,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:04:59,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:04:59,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:04:59,402 INFO L87 Difference]: Start difference. First operand 4056 states and 4949 transitions. Second operand 5 states.