/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=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:34:59,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:34:59,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:34:59,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:34:59,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:34:59,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:34:59,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:34:59,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:34:59,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:34:59,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:34:59,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:34:59,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:34:59,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:34:59,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:34:59,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:34:59,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:34:59,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:34:59,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:34:59,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:34:59,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:34:59,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:34:59,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:34:59,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:34:59,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:34:59,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:34:59,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:34:59,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:34:59,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:34:59,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:34:59,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:34:59,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:34:59,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:34:59,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:34:59,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:34:59,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:34:59,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:34:59,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:34:59,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:34:59,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:34:59,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:34:59,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:34:59,404 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 12:34:59,432 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:34:59,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:34:59,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:34:59,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:34:59,435 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:34:59,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:34:59,435 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:34:59,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:34:59,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:34:59,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:34:59,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:34:59,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:34:59,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:34:59,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:34:59,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:34:59,437 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:34:59,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:34:59,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:34:59,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:34:59,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:34:59,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:34:59,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:34:59,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:34:59,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:34:59,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:34:59,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:34:59,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:34:59,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:34:59,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:34:59,440 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=0.3;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=0.3;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=0.3;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=0.3;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=0.3;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=0.3;log-additional-information=true; [2020-09-25 12:34:59,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:35:00,013 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:35:00,020 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:35:00,024 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:35:00,025 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:35:00,026 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 12:35:00,101 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/368d9166a/bfb7b0a9e9024e8a84dafc4868b3fd5b/FLAG68fb96566 [2020-09-25 12:35:00,825 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:35:00,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 12:35:00,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/368d9166a/bfb7b0a9e9024e8a84dafc4868b3fd5b/FLAG68fb96566 [2020-09-25 12:35:00,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/368d9166a/bfb7b0a9e9024e8a84dafc4868b3fd5b [2020-09-25 12:35:01,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:35:01,008 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:35:01,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:35:01,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:35:01,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:35:01,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:35:00" (1/1) ... [2020-09-25 12:35:01,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683cf205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:01, skipping insertion in model container [2020-09-25 12:35:01,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:35:00" (1/1) ... [2020-09-25 12:35:01,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:35:01,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:35:01,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:35:01,718 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:35:02,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:35:02,167 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:35:02,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:02 WrapperNode [2020-09-25 12:35:02,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:35:02,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:35:02,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:35:02,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:35:02,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:02" (1/1) ... [2020-09-25 12:35:02,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:02" (1/1) ... [2020-09-25 12:35:02,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:02" (1/1) ... [2020-09-25 12:35:02,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:02" (1/1) ... [2020-09-25 12:35:02,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:02" (1/1) ... [2020-09-25 12:35:02,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:02" (1/1) ... [2020-09-25 12:35:02,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:02" (1/1) ... [2020-09-25 12:35:02,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:35:02,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:35:02,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:35:02,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:35:02,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:02" (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 12:35:02,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:35:02,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:35:02,454 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 12:35:02,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:35:02,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:35:02,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 12:35:02,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 12:35:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 12:35:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 12:35:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 12:35:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 12:35:02,458 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 12:35:02,458 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 12:35:02,458 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 12:35:02,458 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 12:35:02,459 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 12:35:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 12:35:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:35:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:35:02,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:35:04,491 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:35:04,492 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 12:35:04,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:35:04 BoogieIcfgContainer [2020-09-25 12:35:04,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:35:04,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:35:04,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:35:04,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:35:04,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:35:00" (1/3) ... [2020-09-25 12:35:04,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8827f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:35:04, skipping insertion in model container [2020-09-25 12:35:04,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:02" (2/3) ... [2020-09-25 12:35:04,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8827f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:35:04, skipping insertion in model container [2020-09-25 12:35:04,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:35:04" (3/3) ... [2020-09-25 12:35:04,516 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 12:35:04,529 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:35:04,541 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:35:04,564 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:35:04,602 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:35:04,603 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:35:04,603 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:35:04,603 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:35:04,603 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:35:04,603 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:35:04,604 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:35:04,604 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:35:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states. [2020-09-25 12:35:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 12:35:04,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:35:04,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:35:04,681 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:35:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:35:04,690 INFO L82 PathProgramCache]: Analyzing trace with hash 752602954, now seen corresponding path program 1 times [2020-09-25 12:35:04,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:35:04,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354695841] [2020-09-25 12:35:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:35:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:05,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:05,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:06,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:06,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:06,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:06,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:07,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:07,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:10,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:10,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 12:35:10,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:35:10,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-09-25 12:35:10,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:10,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:10,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:35:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-09-25 12:35:10,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-25 12:35:10,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 12:35:11,102 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 12:35:11,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:35:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:11,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:11,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:11,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 12:35:11,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:35:11,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 12:35:11,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:11,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:11,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:35:11,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:35:11,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:35:11,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:35:11,584 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 12:35:11,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354695841] [2020-09-25 12:35:11,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:35:11,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:35:11,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181585311] [2020-09-25 12:35:11,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:35:11,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:35:11,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:35:11,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:35:11,640 INFO L87 Difference]: Start difference. First operand 912 states. Second operand 4 states. [2020-09-25 12:35:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:35:15,717 INFO L93 Difference]: Finished difference Result 1664 states and 2163 transitions. [2020-09-25 12:35:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 12:35:15,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 12:35:15,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:35:15,756 INFO L225 Difference]: With dead ends: 1664 [2020-09-25 12:35:15,757 INFO L226 Difference]: Without dead ends: 1251 [2020-09-25 12:35:15,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:35:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-09-25 12:35:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1244. [2020-09-25 12:35:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1244 states. [2020-09-25 12:35:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1517 transitions. [2020-09-25 12:35:15,920 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1517 transitions. Word has length 460 [2020-09-25 12:35:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:35:15,922 INFO L479 AbstractCegarLoop]: Abstraction has 1244 states and 1517 transitions. [2020-09-25 12:35:15,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:35:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1517 transitions. [2020-09-25 12:35:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 12:35:15,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:35:15,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:35:15,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:35:15,933 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:35:15,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:35:15,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1495383786, now seen corresponding path program 1 times [2020-09-25 12:35:15,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:35:15,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623156091] [2020-09-25 12:35:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:35:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:16,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:16,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:16,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:16,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:16,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:16,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:17,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:17,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:21,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:21,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 12:35:21,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:35:21,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 12:35:21,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:21,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:21,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:35:21,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 206 [2020-09-25 12:35:21,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-09-25 12:35:21,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:35:21,538 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 12:35:21,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:35:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:21,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:21,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:21,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 12:35:21,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:35:21,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-25 12:35:21,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:21,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:21,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:35:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:35:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:35:21,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:35:22,076 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 12:35:22,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623156091] [2020-09-25 12:35:22,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:35:22,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:35:22,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913051447] [2020-09-25 12:35:22,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:35:22,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:35:22,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:35:22,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:35:22,084 INFO L87 Difference]: Start difference. First operand 1244 states and 1517 transitions. Second operand 4 states. [2020-09-25 12:35:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:35:25,095 INFO L93 Difference]: Finished difference Result 2510 states and 3146 transitions. [2020-09-25 12:35:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 12:35:25,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 12:35:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:35:25,111 INFO L225 Difference]: With dead ends: 2510 [2020-09-25 12:35:25,111 INFO L226 Difference]: Without dead ends: 2066 [2020-09-25 12:35:25,116 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 12:35:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2020-09-25 12:35:25,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 2054. [2020-09-25 12:35:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2054 states. [2020-09-25 12:35:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2545 transitions. [2020-09-25 12:35:25,201 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2545 transitions. Word has length 460 [2020-09-25 12:35:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:35:25,203 INFO L479 AbstractCegarLoop]: Abstraction has 2054 states and 2545 transitions. [2020-09-25 12:35:25,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:35:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2545 transitions. [2020-09-25 12:35:25,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 12:35:25,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:35:25,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:35:25,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:35:25,228 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:35:25,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:35:25,229 INFO L82 PathProgramCache]: Analyzing trace with hash -863833942, now seen corresponding path program 1 times [2020-09-25 12:35:25,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:35:25,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450172691] [2020-09-25 12:35:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:35:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:25,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:25,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:25,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:26,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:26,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:26,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:26,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:26,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:30,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:30,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 12:35:30,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:35:30,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-09-25 12:35:30,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:30,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:30,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:35:30,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-25 12:35:30,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-09-25 12:35:30,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:35:30,876 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 12:35:30,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:35:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:30,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:30,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:30,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 12:35:30,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:35:30,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-25 12:35:30,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:30,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:30,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:35:30,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:35:30,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:35:30,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:35:31,327 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 12:35:31,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450172691] [2020-09-25 12:35:31,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:35:31,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:35:31,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793173227] [2020-09-25 12:35:31,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:35:31,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:35:31,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:35:31,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:35:31,331 INFO L87 Difference]: Start difference. First operand 2054 states and 2545 transitions. Second operand 4 states. [2020-09-25 12:35:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:35:34,109 INFO L93 Difference]: Finished difference Result 4382 states and 5559 transitions. [2020-09-25 12:35:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 12:35:34,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 12:35:34,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:35:34,128 INFO L225 Difference]: With dead ends: 4382 [2020-09-25 12:35:34,129 INFO L226 Difference]: Without dead ends: 3596 [2020-09-25 12:35:34,132 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 12:35:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2020-09-25 12:35:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3574. [2020-09-25 12:35:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3574 states. [2020-09-25 12:35:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 4481 transitions. [2020-09-25 12:35:34,235 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 4481 transitions. Word has length 460 [2020-09-25 12:35:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:35:34,236 INFO L479 AbstractCegarLoop]: Abstraction has 3574 states and 4481 transitions. [2020-09-25 12:35:34,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:35:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 4481 transitions. [2020-09-25 12:35:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 12:35:34,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:35:34,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:35:34,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:35:34,254 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:35:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:35:34,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1795052938, now seen corresponding path program 1 times [2020-09-25 12:35:34,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:35:34,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136038479] [2020-09-25 12:35:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:35:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:34,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:34,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:34,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:35,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:35,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:35,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:35,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:37,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:37,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:38,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:39,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:39,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 12:35:39,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 12:35:39,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 12:35:39,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:39,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:39,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:35:39,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 177 [2020-09-25 12:35:39,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-09-25 12:35:39,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:35:39,892 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 12:35:39,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:35:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:39,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:39,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:39,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 12:35:39,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:35:39,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-25 12:35:39,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:39,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:39,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:35:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:35:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:35:39,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:35:40,176 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 12:35:40,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136038479] [2020-09-25 12:35:40,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:35:40,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:35:40,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67165853] [2020-09-25 12:35:40,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:35:40,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:35:40,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:35:40,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:35:40,179 INFO L87 Difference]: Start difference. First operand 3574 states and 4481 transitions. Second operand 5 states. [2020-09-25 12:35:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:35:45,773 INFO L93 Difference]: Finished difference Result 10018 states and 12622 transitions. [2020-09-25 12:35:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:35:45,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 460 [2020-09-25 12:35:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:35:45,806 INFO L225 Difference]: With dead ends: 10018 [2020-09-25 12:35:45,806 INFO L226 Difference]: Without dead ends: 6767 [2020-09-25 12:35:45,814 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 12:35:45,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6767 states. [2020-09-25 12:35:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6767 to 6765. [2020-09-25 12:35:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6765 states. [2020-09-25 12:35:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 8468 transitions. [2020-09-25 12:35:46,062 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 8468 transitions. Word has length 460 [2020-09-25 12:35:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:35:46,063 INFO L479 AbstractCegarLoop]: Abstraction has 6765 states and 8468 transitions. [2020-09-25 12:35:46,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:35:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 8468 transitions. [2020-09-25 12:35:46,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-09-25 12:35:46,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:35:46,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:35:46,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:35:46,082 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:35:46,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:35:46,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1015881836, now seen corresponding path program 1 times [2020-09-25 12:35:46,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:35:46,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411102640] [2020-09-25 12:35:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:35:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:46,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:46,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:46,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:46,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking...