/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:06:54,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:06:54,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:06:54,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:06:54,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:06:54,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:06:54,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:06:54,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:06:54,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:06:54,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:06:54,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:06:54,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:06:54,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:06:54,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:06:54,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:06:54,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:06:54,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:06:54,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:06:54,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:06:54,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:06:54,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:06:54,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:06:54,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:06:54,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:06:54,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:06:54,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:06:54,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:06:54,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:06:54,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:06:54,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:06:54,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:06:54,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:06:54,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:06:54,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:06:54,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:06:54,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:06:54,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:06:54,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:06:54,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:06:54,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:06:54,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:06:54,504 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 [2020-10-14 09:06:54,544 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:06:54,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:06:54,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:06:54,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:06:54,547 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:06:54,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:06:54,547 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:06:54,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:06:54,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:06:54,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:06:54,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:06:54,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:06:54,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:06:54,550 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:06:54,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:06:54,550 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:06:54,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:06:54,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:06:54,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:06:54,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:06:54,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:06:54,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:06:54,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:06:54,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:06:54,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:06:54,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:06:54,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:06:54,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:06:54,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:06:54,553 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:06:54,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:06:54,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:06:54,866 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:06:54,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:06:54,868 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:06:54,869 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:06:54,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b86226e8d/009812181f414c25864e60741239c41c/FLAG4d6390017 [2020-10-14 09:06:55,394 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:06:55,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:06:55,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b86226e8d/009812181f414c25864e60741239c41c/FLAG4d6390017 [2020-10-14 09:06:55,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b86226e8d/009812181f414c25864e60741239c41c [2020-10-14 09:06:55,740 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:06:55,742 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:06:55,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:06:55,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:06:55,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:06:55,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:06:55" (1/1) ... [2020-10-14 09:06:55,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4a5394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:55, skipping insertion in model container [2020-10-14 09:06:55,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:06:55" (1/1) ... [2020-10-14 09:06:55,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:06:55,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:06:56,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:06:56,100 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:06:56,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:06:56,278 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:06:56,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:56 WrapperNode [2020-10-14 09:06:56,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:06:56,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:06:56,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:06:56,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:06:56,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:56" (1/1) ... [2020-10-14 09:06:56,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:56" (1/1) ... [2020-10-14 09:06:56,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:56" (1/1) ... [2020-10-14 09:06:56,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:56" (1/1) ... [2020-10-14 09:06:56,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:56" (1/1) ... [2020-10-14 09:06:56,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:56" (1/1) ... [2020-10-14 09:06:56,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:56" (1/1) ... [2020-10-14 09:06:56,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:06:56,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:06:56,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:06:56,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:06:56,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:56" (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 [2020-10-14 09:06:56,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:06:56,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:06:56,389 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:06:56,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:06:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:06:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:06:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:06:56,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 09:06:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:06:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:06:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:06:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:06:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:06:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:06:56,392 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:06:56,392 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:06:56,393 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:06:56,393 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:06:56,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:06:56,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:06:56,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:06:56,962 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:06:56,963 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:06:56,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:06:56 BoogieIcfgContainer [2020-10-14 09:06:56,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:06:56,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:06:56,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:06:56,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:06:56,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:06:55" (1/3) ... [2020-10-14 09:06:56,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5840f67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:06:56, skipping insertion in model container [2020-10-14 09:06:56,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:56" (2/3) ... [2020-10-14 09:06:56,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5840f67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:06:56, skipping insertion in model container [2020-10-14 09:06:56,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:06:56" (3/3) ... [2020-10-14 09:06:56,978 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:06:56,991 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:06:57,000 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:06:57,016 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:06:57,045 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:06:57,046 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:06:57,046 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:06:57,046 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:06:57,047 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:06:57,047 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:06:57,047 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:06:57,047 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:06:57,072 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2020-10-14 09:06:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 09:06:57,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:57,084 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] [2020-10-14 09:06:57,085 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:57,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:57,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1677922447, now seen corresponding path program 1 times [2020-10-14 09:06:57,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:57,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572088916] [2020-10-14 09:06:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:57,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:57,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:57,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:58,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:58,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 09:06:58,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:06:58,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 986 [2020-10-14 09:06:58,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:58,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:06:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:06:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 09:06:58,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:06:58,582 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-14 09:06:58,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:58,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:58,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:58,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:58,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:58,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:06:58,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:58,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:58,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:58,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:58,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:58,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:58,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572088916] [2020-10-14 09:06:58,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:58,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:06:58,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44924157] [2020-10-14 09:06:58,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:06:58,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:58,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:06:58,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:06:58,672 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 4 states. [2020-10-14 09:06:59,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:59,298 INFO L93 Difference]: Finished difference Result 212 states and 331 transitions. [2020-10-14 09:06:59,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:06:59,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-14 09:06:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:59,314 INFO L225 Difference]: With dead ends: 212 [2020-10-14 09:06:59,315 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 09:06:59,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:06:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 09:06:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-14 09:06:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-14 09:06:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 198 transitions. [2020-10-14 09:06:59,380 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 198 transitions. Word has length 42 [2020-10-14 09:06:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:59,381 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 198 transitions. [2020-10-14 09:06:59,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:06:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 198 transitions. [2020-10-14 09:06:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 09:06:59,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:59,383 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] [2020-10-14 09:06:59,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:06:59,384 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1937467768, now seen corresponding path program 1 times [2020-10-14 09:06:59,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:59,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554847338] [2020-10-14 09:06:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:59,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:59,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:59,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:59,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 09:06:59,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:06:59,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-14 09:06:59,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:59,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:59,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:06:59,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:06:59,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 09:06:59,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:06:59,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:59,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:59,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:59,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:59,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:59,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:06:59,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:59,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:59,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:59,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:59,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:59,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:00,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554847338] [2020-10-14 09:07:00,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:00,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:07:00,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980931396] [2020-10-14 09:07:00,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:07:00,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:00,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:07:00,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:00,005 INFO L87 Difference]: Start difference. First operand 134 states and 198 transitions. Second operand 4 states. [2020-10-14 09:07:00,177 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-14 09:07:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:00,665 INFO L93 Difference]: Finished difference Result 322 states and 494 transitions. [2020-10-14 09:07:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:07:00,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-14 09:07:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:00,668 INFO L225 Difference]: With dead ends: 322 [2020-10-14 09:07:00,669 INFO L226 Difference]: Without dead ends: 212 [2020-10-14 09:07:00,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:07:00,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-14 09:07:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2020-10-14 09:07:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-14 09:07:00,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 317 transitions. [2020-10-14 09:07:00,698 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 317 transitions. Word has length 43 [2020-10-14 09:07:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:00,699 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 317 transitions. [2020-10-14 09:07:00,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:07:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 317 transitions. [2020-10-14 09:07:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 09:07:00,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:00,701 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] [2020-10-14 09:07:00,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:07:00,702 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:00,702 INFO L82 PathProgramCache]: Analyzing trace with hash 583809816, now seen corresponding path program 1 times [2020-10-14 09:07:00,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:00,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953685149] [2020-10-14 09:07:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:00,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:00,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:01,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:01,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 09:07:01,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:07:01,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-14 09:07:01,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:01,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:01,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:07:01,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:07:01,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 09:07:01,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:01,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:01,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:01,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:01,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:01,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:01,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:07:01,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:01,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:01,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:01,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:01,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:01,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:01,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953685149] [2020-10-14 09:07:01,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:01,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:07:01,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638344173] [2020-10-14 09:07:01,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:07:01,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:01,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:07:01,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:01,502 INFO L87 Difference]: Start difference. First operand 210 states and 317 transitions. Second operand 6 states. [2020-10-14 09:07:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:02,001 INFO L93 Difference]: Finished difference Result 954 states and 1489 transitions. [2020-10-14 09:07:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:07:02,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-14 09:07:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:02,007 INFO L225 Difference]: With dead ends: 954 [2020-10-14 09:07:02,007 INFO L226 Difference]: Without dead ends: 768 [2020-10-14 09:07:02,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:07:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-14 09:07:02,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 394. [2020-10-14 09:07:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-14 09:07:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 601 transitions. [2020-10-14 09:07:02,051 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 601 transitions. Word has length 44 [2020-10-14 09:07:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:02,051 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 601 transitions. [2020-10-14 09:07:02,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:07:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 601 transitions. [2020-10-14 09:07:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 09:07:02,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:02,054 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] [2020-10-14 09:07:02,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:07:02,055 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:02,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:02,055 INFO L82 PathProgramCache]: Analyzing trace with hash 899702325, now seen corresponding path program 1 times [2020-10-14 09:07:02,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:02,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151375216] [2020-10-14 09:07:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:02,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:02,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:02,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:02,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 09:07:02,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:07:02,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-14 09:07:02,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:02,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:02,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:07:02,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 09:07:02,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:07:02,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:02,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:02,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:02,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:02,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:02,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:02,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:07:02,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:02,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:02,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:02,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:02,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:02,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:02,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151375216] [2020-10-14 09:07:02,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:02,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:07:02,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413869227] [2020-10-14 09:07:02,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:07:02,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:07:02,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:02,610 INFO L87 Difference]: Start difference. First operand 394 states and 601 transitions. Second operand 6 states. [2020-10-14 09:07:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:03,372 INFO L93 Difference]: Finished difference Result 1352 states and 2084 transitions. [2020-10-14 09:07:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:07:03,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-14 09:07:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:03,378 INFO L225 Difference]: With dead ends: 1352 [2020-10-14 09:07:03,379 INFO L226 Difference]: Without dead ends: 982 [2020-10-14 09:07:03,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2020-10-14 09:07:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 978. [2020-10-14 09:07:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-10-14 09:07:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1497 transitions. [2020-10-14 09:07:03,449 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1497 transitions. Word has length 45 [2020-10-14 09:07:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:03,449 INFO L479 AbstractCegarLoop]: Abstraction has 978 states and 1497 transitions. [2020-10-14 09:07:03,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:07:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1497 transitions. [2020-10-14 09:07:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 09:07:03,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:03,452 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] [2020-10-14 09:07:03,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:07:03,452 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:03,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:03,453 INFO L82 PathProgramCache]: Analyzing trace with hash 869187691, now seen corresponding path program 1 times [2020-10-14 09:07:03,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:03,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252528866] [2020-10-14 09:07:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:03,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:03,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:03,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:03,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 09:07:03,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:07:03,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-14 09:07:03,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:03,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:03,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:07:03,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:07:03,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 09:07:03,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:03,840 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-14 09:07:03,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:03,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:03,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:03,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:03,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:03,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:07:03,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:03,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:03,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:03,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:03,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:03,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:03,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252528866] [2020-10-14 09:07:03,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:03,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:07:03,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979663545] [2020-10-14 09:07:03,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:07:03,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:03,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:07:03,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:03,875 INFO L87 Difference]: Start difference. First operand 978 states and 1497 transitions. Second operand 4 states. [2020-10-14 09:07:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:04,676 INFO L93 Difference]: Finished difference Result 2494 states and 3811 transitions. [2020-10-14 09:07:04,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:07:04,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-14 09:07:04,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:04,689 INFO L225 Difference]: With dead ends: 2494 [2020-10-14 09:07:04,689 INFO L226 Difference]: Without dead ends: 1540 [2020-10-14 09:07:04,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:07:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2020-10-14 09:07:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1538. [2020-10-14 09:07:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2020-10-14 09:07:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2313 transitions. [2020-10-14 09:07:04,864 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2313 transitions. Word has length 46 [2020-10-14 09:07:04,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:04,864 INFO L479 AbstractCegarLoop]: Abstraction has 1538 states and 2313 transitions. [2020-10-14 09:07:04,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:07:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2313 transitions. [2020-10-14 09:07:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 09:07:04,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:04,871 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] [2020-10-14 09:07:04,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:07:04,872 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:04,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:04,872 INFO L82 PathProgramCache]: Analyzing trace with hash -281581922, now seen corresponding path program 1 times [2020-10-14 09:07:04,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:04,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352260371] [2020-10-14 09:07:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:04,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:05,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:05,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:05,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 09:07:05,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:07:05,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-14 09:07:05,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:05,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:05,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:07:05,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:07:05,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 09:07:05,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 09:07:05,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:05,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:05,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:05,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:05,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:05,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 09:07:05,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:05,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:05,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:07:05,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:05,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:07:05,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:07:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:05,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352260371] [2020-10-14 09:07:05,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:05,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:07:05,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918448024] [2020-10-14 09:07:05,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:07:05,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:05,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:07:05,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:05,510 INFO L87 Difference]: Start difference. First operand 1538 states and 2313 transitions. Second operand 6 states. [2020-10-14 09:07:05,740 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-14 09:07:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:06,416 INFO L93 Difference]: Finished difference Result 4526 states and 6811 transitions. [2020-10-14 09:07:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:07:06,417 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-14 09:07:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:06,434 INFO L225 Difference]: With dead ends: 4526 [2020-10-14 09:07:06,435 INFO L226 Difference]: Without dead ends: 3012 [2020-10-14 09:07:06,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 09:07:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2020-10-14 09:07:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 3010. [2020-10-14 09:07:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3010 states. [2020-10-14 09:07:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 4481 transitions. [2020-10-14 09:07:06,734 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 4481 transitions. Word has length 47 [2020-10-14 09:07:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:06,736 INFO L479 AbstractCegarLoop]: Abstraction has 3010 states and 4481 transitions. [2020-10-14 09:07:06,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:07:06,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 4481 transitions. [2020-10-14 09:07:06,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 09:07:06,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:06,737 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] [2020-10-14 09:07:06,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:07:06,738 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:06,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:06,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1095993917, now seen corresponding path program 1 times [2020-10-14 09:07:06,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:06,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461479854] [2020-10-14 09:07:06,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:06,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:06,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:06,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 09:07:06,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:06,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-14 09:07:06,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:06,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:06,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:07:06,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:07:06,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:07:06,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:07,054 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-14 09:07:07,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:07,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:07,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:07,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:07,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:07,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:07:07,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:07,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:07,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:07,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:07,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:07,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:07,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461479854] [2020-10-14 09:07:07,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:07,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:07:07,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279231889] [2020-10-14 09:07:07,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:07:07,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:07,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:07:07,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:07:07,079 INFO L87 Difference]: Start difference. First operand 3010 states and 4481 transitions. Second operand 5 states. [2020-10-14 09:07:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:08,012 INFO L93 Difference]: Finished difference Result 6188 states and 9130 transitions. [2020-10-14 09:07:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:07:08,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-14 09:07:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:08,044 INFO L225 Difference]: With dead ends: 6188 [2020-10-14 09:07:08,044 INFO L226 Difference]: Without dead ends: 6186 [2020-10-14 09:07:08,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:08,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2020-10-14 09:07:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 3202. [2020-10-14 09:07:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3202 states. [2020-10-14 09:07:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 4673 transitions. [2020-10-14 09:07:08,361 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 4673 transitions. Word has length 47 [2020-10-14 09:07:08,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:08,361 INFO L479 AbstractCegarLoop]: Abstraction has 3202 states and 4673 transitions. [2020-10-14 09:07:08,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:07:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 4673 transitions. [2020-10-14 09:07:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 09:07:08,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:08,362 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] [2020-10-14 09:07:08,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:07:08,363 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:08,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:08,363 INFO L82 PathProgramCache]: Analyzing trace with hash 393546649, now seen corresponding path program 1 times [2020-10-14 09:07:08,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:08,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968748847] [2020-10-14 09:07:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:08,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:08,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:08,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 09:07:08,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:08,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-14 09:07:08,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:08,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:07:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:07:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 09:07:08,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:07:08,626 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-14 09:07:08,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:08,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:08,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:08,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:08,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:08,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:07:08,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:08,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:08,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:08,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:08,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:08,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:07:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:08,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968748847] [2020-10-14 09:07:08,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:08,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:07:08,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661769057] [2020-10-14 09:07:08,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:07:08,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:08,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:07:08,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:08,664 INFO L87 Difference]: Start difference. First operand 3202 states and 4673 transitions. Second operand 4 states. [2020-10-14 09:07:08,799 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-14 09:07:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:09,417 INFO L93 Difference]: Finished difference Result 7092 states and 10337 transitions. [2020-10-14 09:07:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:07:09,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-14 09:07:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:09,441 INFO L225 Difference]: With dead ends: 7092 [2020-10-14 09:07:09,441 INFO L226 Difference]: Without dead ends: 3914 [2020-10-14 09:07:09,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:07:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2020-10-14 09:07:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3892. [2020-10-14 09:07:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3892 states. [2020-10-14 09:07:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3892 states to 3892 states and 5627 transitions. [2020-10-14 09:07:09,755 INFO L78 Accepts]: Start accepts. Automaton has 3892 states and 5627 transitions. Word has length 48 [2020-10-14 09:07:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:09,756 INFO L479 AbstractCegarLoop]: Abstraction has 3892 states and 5627 transitions. [2020-10-14 09:07:09,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:07:09,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3892 states and 5627 transitions. [2020-10-14 09:07:09,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:07:09,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:09,760 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:09,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:07:09,760 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:09,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1259242370, now seen corresponding path program 1 times [2020-10-14 09:07:09,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:09,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150150933] [2020-10-14 09:07:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:09,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:09,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:10,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:11,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:11,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:07:11,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:07:11,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1301 [2020-10-14 09:07:11,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:11,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:11,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:07:11,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:07:11,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 09:07:11,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:11,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:11,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:11,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:11,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:11,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:11,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:07:11,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:11,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:11,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:11,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:11,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:11,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:07:11,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150150933] [2020-10-14 09:07:11,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:07:11,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 09:07:11,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492668323] [2020-10-14 09:07:11,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:07:11,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:11,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:07:11,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:07:11,276 INFO L87 Difference]: Start difference. First operand 3892 states and 5627 transitions. Second operand 5 states. [2020-10-14 09:07:11,453 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-14 09:07:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:12,329 INFO L93 Difference]: Finished difference Result 9750 states and 14122 transitions. [2020-10-14 09:07:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:07:12,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-14 09:07:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:12,361 INFO L225 Difference]: With dead ends: 9750 [2020-10-14 09:07:12,362 INFO L226 Difference]: Without dead ends: 6572 [2020-10-14 09:07:12,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:07:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6572 states. [2020-10-14 09:07:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6572 to 6524. [2020-10-14 09:07:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6524 states. [2020-10-14 09:07:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6524 states to 6524 states and 9295 transitions. [2020-10-14 09:07:12,942 INFO L78 Accepts]: Start accepts. Automaton has 6524 states and 9295 transitions. Word has length 67 [2020-10-14 09:07:12,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:12,942 INFO L479 AbstractCegarLoop]: Abstraction has 6524 states and 9295 transitions. [2020-10-14 09:07:12,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:07:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 6524 states and 9295 transitions. [2020-10-14 09:07:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:07:12,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:12,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:12,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:07:12,946 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:12,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1832759001, now seen corresponding path program 1 times [2020-10-14 09:07:12,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:12,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242572432] [2020-10-14 09:07:12,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:12,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:12,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:13,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:13,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:13,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:13,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:15,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:17,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:17,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:07:17,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:07:17,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:07:17,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:17,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:17,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:07:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 09:07:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 09:07:17,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:18,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:18,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:18,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:18,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:18,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:18,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:07:18,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:18,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:18,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:18,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:18,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:18,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:18,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242572432] [2020-10-14 09:07:18,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:18,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:07:18,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315248641] [2020-10-14 09:07:18,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:07:18,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:18,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:07:18,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:18,104 INFO L87 Difference]: Start difference. First operand 6524 states and 9295 transitions. Second operand 4 states. [2020-10-14 09:07:19,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:19,217 INFO L93 Difference]: Finished difference Result 15345 states and 21875 transitions. [2020-10-14 09:07:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:07:19,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:07:19,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:19,262 INFO L225 Difference]: With dead ends: 15345 [2020-10-14 09:07:19,262 INFO L226 Difference]: Without dead ends: 10559 [2020-10-14 09:07:19,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2020-10-14 09:07:19,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 10557. [2020-10-14 09:07:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10557 states. [2020-10-14 09:07:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10557 states to 10557 states and 14861 transitions. [2020-10-14 09:07:19,850 INFO L78 Accepts]: Start accepts. Automaton has 10557 states and 14861 transitions. Word has length 67 [2020-10-14 09:07:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:19,850 INFO L479 AbstractCegarLoop]: Abstraction has 10557 states and 14861 transitions. [2020-10-14 09:07:19,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:07:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand 10557 states and 14861 transitions. [2020-10-14 09:07:19,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:07:19,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:19,855 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:19,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:07:19,856 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:19,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:19,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1763915728, now seen corresponding path program 1 times [2020-10-14 09:07:19,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:19,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258537366] [2020-10-14 09:07:19,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:19,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:19,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:19,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:20,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:20,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:20,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:22,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:22,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:07:22,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:07:22,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2814 [2020-10-14 09:07:22,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:22,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:22,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:07:22,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-14 09:07:22,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 09:07:22,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:22,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:22,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:22,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:22,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:22,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:22,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:07:22,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:22,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:22,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:22,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:22,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:22,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:22,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258537366] [2020-10-14 09:07:22,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:22,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:07:22,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425918503] [2020-10-14 09:07:22,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:07:22,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:22,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:07:22,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:22,843 INFO L87 Difference]: Start difference. First operand 10557 states and 14861 transitions. Second operand 4 states. [2020-10-14 09:07:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:24,243 INFO L93 Difference]: Finished difference Result 19114 states and 26904 transitions. [2020-10-14 09:07:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:07:24,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:07:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:24,266 INFO L225 Difference]: With dead ends: 19114 [2020-10-14 09:07:24,266 INFO L226 Difference]: Without dead ends: 8584 [2020-10-14 09:07:24,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8584 states. [2020-10-14 09:07:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8584 to 8582. [2020-10-14 09:07:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8582 states. [2020-10-14 09:07:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8582 states to 8582 states and 11909 transitions. [2020-10-14 09:07:24,908 INFO L78 Accepts]: Start accepts. Automaton has 8582 states and 11909 transitions. Word has length 67 [2020-10-14 09:07:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:24,908 INFO L479 AbstractCegarLoop]: Abstraction has 8582 states and 11909 transitions. [2020-10-14 09:07:24,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:07:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 8582 states and 11909 transitions. [2020-10-14 09:07:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:07:24,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:24,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:24,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:07:24,912 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:24,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2123259927, now seen corresponding path program 1 times [2020-10-14 09:07:24,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:24,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787721406] [2020-10-14 09:07:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:24,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:24,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:25,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:07:25,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:07:25,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 887 [2020-10-14 09:07:25,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:25,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:25,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:07:25,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 09:07:25,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 09:07:25,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:25,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:25,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:25,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:25,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:25,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:07:25,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:25,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:25,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:25,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787721406] [2020-10-14 09:07:25,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:25,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:07:25,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007166361] [2020-10-14 09:07:25,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:07:25,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:25,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:07:25,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:25,950 INFO L87 Difference]: Start difference. First operand 8582 states and 11909 transitions. Second operand 4 states. [2020-10-14 09:07:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:26,958 INFO L93 Difference]: Finished difference Result 16813 states and 23164 transitions. [2020-10-14 09:07:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:07:26,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 09:07:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:26,983 INFO L225 Difference]: With dead ends: 16813 [2020-10-14 09:07:26,984 INFO L226 Difference]: Without dead ends: 11574 [2020-10-14 09:07:26,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:07:27,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11574 states. [2020-10-14 09:07:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11574 to 11572. [2020-10-14 09:07:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11572 states. [2020-10-14 09:07:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11572 states to 11572 states and 15764 transitions. [2020-10-14 09:07:27,581 INFO L78 Accepts]: Start accepts. Automaton has 11572 states and 15764 transitions. Word has length 68 [2020-10-14 09:07:27,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:27,581 INFO L479 AbstractCegarLoop]: Abstraction has 11572 states and 15764 transitions. [2020-10-14 09:07:27,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:07:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 11572 states and 15764 transitions. [2020-10-14 09:07:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:07:27,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:27,585 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:27,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:07:27,585 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:27,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1684871538, now seen corresponding path program 1 times [2020-10-14 09:07:27,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:27,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029518004] [2020-10-14 09:07:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:27,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:27,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:27,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:27,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:28,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:28,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:29,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:32,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:32,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:07:32,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:07:32,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:07:32,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:32,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:32,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:07:32,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 09:07:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:07:32,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:32,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:32,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:32,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:32,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:32,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:32,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:07:32,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:32,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:32,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:32,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029518004] [2020-10-14 09:07:32,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:32,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:07:32,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418934972] [2020-10-14 09:07:32,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:07:32,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:32,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:07:32,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:32,737 INFO L87 Difference]: Start difference. First operand 11572 states and 15764 transitions. Second operand 4 states. [2020-10-14 09:07:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:33,763 INFO L93 Difference]: Finished difference Result 19618 states and 26547 transitions. [2020-10-14 09:07:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:07:33,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 09:07:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:33,865 INFO L225 Difference]: With dead ends: 19618 [2020-10-14 09:07:33,865 INFO L226 Difference]: Without dead ends: 12094 [2020-10-14 09:07:33,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:07:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12094 states. [2020-10-14 09:07:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12094 to 11615. [2020-10-14 09:07:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11615 states. [2020-10-14 09:07:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11615 states to 11615 states and 15578 transitions. [2020-10-14 09:07:34,499 INFO L78 Accepts]: Start accepts. Automaton has 11615 states and 15578 transitions. Word has length 68 [2020-10-14 09:07:34,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:34,500 INFO L479 AbstractCegarLoop]: Abstraction has 11615 states and 15578 transitions. [2020-10-14 09:07:34,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:07:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 11615 states and 15578 transitions. [2020-10-14 09:07:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:07:34,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:34,504 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:34,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:07:34,505 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:34,505 INFO L82 PathProgramCache]: Analyzing trace with hash -644809078, now seen corresponding path program 1 times [2020-10-14 09:07:34,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:34,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828552077] [2020-10-14 09:07:34,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:34,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:34,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:34,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:34,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:34,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:34,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:35,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:38,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:38,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:07:38,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:07:38,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3591 [2020-10-14 09:07:38,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:38,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:38,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:07:38,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 09:07:38,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 09:07:38,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:38,372 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-14 09:07:38,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:38,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:38,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:38,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:38,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:38,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:07:38,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:38,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:38,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:38,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:38,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:07:38,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828552077] [2020-10-14 09:07:38,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:07:38,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:07:38,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137199636] [2020-10-14 09:07:38,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:07:38,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:38,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:07:38,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:38,415 INFO L87 Difference]: Start difference. First operand 11615 states and 15578 transitions. Second operand 6 states. [2020-10-14 09:07:38,586 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-14 09:07:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:39,985 INFO L93 Difference]: Finished difference Result 25490 states and 34781 transitions. [2020-10-14 09:07:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:07:39,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-14 09:07:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:40,017 INFO L225 Difference]: With dead ends: 25490 [2020-10-14 09:07:40,017 INFO L226 Difference]: Without dead ends: 21333 [2020-10-14 09:07:40,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:07:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21333 states. [2020-10-14 09:07:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21333 to 16901. [2020-10-14 09:07:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16901 states. [2020-10-14 09:07:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16901 states to 16901 states and 22634 transitions. [2020-10-14 09:07:41,128 INFO L78 Accepts]: Start accepts. Automaton has 16901 states and 22634 transitions. Word has length 68 [2020-10-14 09:07:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:41,128 INFO L479 AbstractCegarLoop]: Abstraction has 16901 states and 22634 transitions. [2020-10-14 09:07:41,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:07:41,129 INFO L276 IsEmpty]: Start isEmpty. Operand 16901 states and 22634 transitions. [2020-10-14 09:07:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:07:41,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:41,132 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:41,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:07:41,133 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash 10881536, now seen corresponding path program 1 times [2020-10-14 09:07:41,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:41,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961368558] [2020-10-14 09:07:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:41,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:41,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:41,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:41,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:42,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:07:42,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:07:42,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 864 [2020-10-14 09:07:42,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:42,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:42,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:07:42,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:07:42,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 09:07:42,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:42,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:42,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:42,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:42,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:42,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:07:42,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:42,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:42,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:42,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:42,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 09:07:42,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961368558] [2020-10-14 09:07:42,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:07:42,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:07:42,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344487210] [2020-10-14 09:07:42,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:07:42,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:42,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:07:42,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:42,172 INFO L87 Difference]: Start difference. First operand 16901 states and 22634 transitions. Second operand 6 states. [2020-10-14 09:07:42,325 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-14 09:07:43,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:43,908 INFO L93 Difference]: Finished difference Result 28755 states and 38816 transitions. [2020-10-14 09:07:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:07:43,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-14 09:07:43,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:43,935 INFO L225 Difference]: With dead ends: 28755 [2020-10-14 09:07:43,935 INFO L226 Difference]: Without dead ends: 22303 [2020-10-14 09:07:43,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:07:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22303 states. [2020-10-14 09:07:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22303 to 18082. [2020-10-14 09:07:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18082 states. [2020-10-14 09:07:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 24171 transitions. [2020-10-14 09:07:45,131 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 24171 transitions. Word has length 68 [2020-10-14 09:07:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:45,131 INFO L479 AbstractCegarLoop]: Abstraction has 18082 states and 24171 transitions. [2020-10-14 09:07:45,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:07:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 24171 transitions. [2020-10-14 09:07:45,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:07:45,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:45,135 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:45,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:07:45,135 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:45,136 INFO L82 PathProgramCache]: Analyzing trace with hash 773632439, now seen corresponding path program 1 times [2020-10-14 09:07:45,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:45,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295451084] [2020-10-14 09:07:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:45,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:45,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:45,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:45,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:45,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:45,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:45,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:07:45,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:07:45,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-14 09:07:45,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:45,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:45,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:07:45,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:07:45,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 09:07:45,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:45,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:45,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:45,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:45,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:45,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:45,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:07:45,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:45,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:45,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 09:07:46,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295451084] [2020-10-14 09:07:46,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:07:46,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:07:46,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294210990] [2020-10-14 09:07:46,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:07:46,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:46,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:07:46,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:46,004 INFO L87 Difference]: Start difference. First operand 18082 states and 24171 transitions. Second operand 6 states. [2020-10-14 09:07:47,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:47,729 INFO L93 Difference]: Finished difference Result 27786 states and 37388 transitions. [2020-10-14 09:07:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:07:47,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-14 09:07:47,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:47,752 INFO L225 Difference]: With dead ends: 27786 [2020-10-14 09:07:47,752 INFO L226 Difference]: Without dead ends: 23412 [2020-10-14 09:07:47,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:07:47,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23412 states. [2020-10-14 09:07:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23412 to 20322. [2020-10-14 09:07:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20322 states. [2020-10-14 09:07:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20322 states to 20322 states and 27163 transitions. [2020-10-14 09:07:49,747 INFO L78 Accepts]: Start accepts. Automaton has 20322 states and 27163 transitions. Word has length 68 [2020-10-14 09:07:49,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:49,747 INFO L479 AbstractCegarLoop]: Abstraction has 20322 states and 27163 transitions. [2020-10-14 09:07:49,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:07:49,747 INFO L276 IsEmpty]: Start isEmpty. Operand 20322 states and 27163 transitions. [2020-10-14 09:07:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 09:07:49,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:49,751 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:49,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:07:49,752 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:49,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:49,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1148082053, now seen corresponding path program 1 times [2020-10-14 09:07:49,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:49,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399421616] [2020-10-14 09:07:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:49,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:49,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:49,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:49,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:50,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:50,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:50,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:50,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:50,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:54,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:54,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 09:07:54,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:07:54,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4387 [2020-10-14 09:07:54,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:54,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:54,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:07:54,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 09:07:54,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 09:07:54,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:54,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:54,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:54,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:54,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:54,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:54,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:07:54,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:54,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:54,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:54,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:54,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:54,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:54,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399421616] [2020-10-14 09:07:54,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:54,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:07:54,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106719569] [2020-10-14 09:07:54,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:07:54,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:54,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:07:54,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:54,283 INFO L87 Difference]: Start difference. First operand 20322 states and 27163 transitions. Second operand 4 states. [2020-10-14 09:07:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:55,837 INFO L93 Difference]: Finished difference Result 31395 states and 41918 transitions. [2020-10-14 09:07:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:07:55,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 09:07:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:55,861 INFO L225 Difference]: With dead ends: 31395 [2020-10-14 09:07:55,861 INFO L226 Difference]: Without dead ends: 20341 [2020-10-14 09:07:55,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:07:55,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20341 states. [2020-10-14 09:07:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20341 to 20278. [2020-10-14 09:07:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20278 states. [2020-10-14 09:07:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20278 states to 20278 states and 26896 transitions. [2020-10-14 09:07:56,973 INFO L78 Accepts]: Start accepts. Automaton has 20278 states and 26896 transitions. Word has length 71 [2020-10-14 09:07:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:56,973 INFO L479 AbstractCegarLoop]: Abstraction has 20278 states and 26896 transitions. [2020-10-14 09:07:56,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:07:56,973 INFO L276 IsEmpty]: Start isEmpty. Operand 20278 states and 26896 transitions. [2020-10-14 09:07:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:07:56,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:56,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:56,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:07:56,978 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:56,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:56,979 INFO L82 PathProgramCache]: Analyzing trace with hash -518632823, now seen corresponding path program 1 times [2020-10-14 09:07:56,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:56,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476557986] [2020-10-14 09:07:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:57,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:58,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:58,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:58,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:58,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:58,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:58,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:59,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:59,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:01,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:02,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:02,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:08:02,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 09:08:02,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-14 09:08:02,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:02,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:02,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:08:02,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:08:02,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:08:02,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:02,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:02,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:02,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:02,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:02,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:02,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:08:02,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:02,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:02,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:02,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476557986] [2020-10-14 09:08:02,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:08:02,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:08:02,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861594804] [2020-10-14 09:08:02,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:08:02,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:02,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:08:02,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:08:02,189 INFO L87 Difference]: Start difference. First operand 20278 states and 26896 transitions. Second operand 6 states. [2020-10-14 09:08:02,354 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-14 09:08:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:08,927 INFO L93 Difference]: Finished difference Result 106379 states and 140895 transitions. [2020-10-14 09:08:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:08:08,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-14 09:08:08,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:09,029 INFO L225 Difference]: With dead ends: 106379 [2020-10-14 09:08:09,029 INFO L226 Difference]: Without dead ends: 86822 [2020-10-14 09:08:09,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:08:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86822 states. [2020-10-14 09:08:12,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86822 to 65588. [2020-10-14 09:08:12,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65588 states. [2020-10-14 09:08:13,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65588 states to 65588 states and 86518 transitions. [2020-10-14 09:08:13,044 INFO L78 Accepts]: Start accepts. Automaton has 65588 states and 86518 transitions. Word has length 73 [2020-10-14 09:08:13,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:13,044 INFO L479 AbstractCegarLoop]: Abstraction has 65588 states and 86518 transitions. [2020-10-14 09:08:13,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:08:13,044 INFO L276 IsEmpty]: Start isEmpty. Operand 65588 states and 86518 transitions. [2020-10-14 09:08:13,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:08:13,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:13,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:13,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:08:13,050 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:13,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1586178236, now seen corresponding path program 1 times [2020-10-14 09:08:13,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:13,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539143159] [2020-10-14 09:08:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:13,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:13,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:13,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:13,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:13,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:13,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:13,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:13,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:14,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:14,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:14,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:14,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:14,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:15,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:15,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:15,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:15,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:15,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:15,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:15,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:16,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:16,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:16,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:17,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:18,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:18,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:08:18,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-14 09:08:18,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:08:18,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:18,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:18,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:08:18,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:08:18,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:08:18,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:18,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:18,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:18,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:18,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:18,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:18,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:08:18,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:18,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:18,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:18,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:18,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:18,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:18,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539143159] [2020-10-14 09:08:18,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:08:18,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:08:18,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245381903] [2020-10-14 09:08:18,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:08:18,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:18,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:08:18,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:08:18,197 INFO L87 Difference]: Start difference. First operand 65588 states and 86518 transitions. Second operand 6 states. [2020-10-14 09:08:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:25,146 INFO L93 Difference]: Finished difference Result 156559 states and 206264 transitions. [2020-10-14 09:08:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 09:08:25,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-14 09:08:25,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:25,279 INFO L225 Difference]: With dead ends: 156559 [2020-10-14 09:08:25,279 INFO L226 Difference]: Without dead ends: 91080 [2020-10-14 09:08:25,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:08:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91080 states. [2020-10-14 09:08:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91080 to 67022. [2020-10-14 09:08:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67022 states. [2020-10-14 09:08:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67022 states to 67022 states and 86210 transitions. [2020-10-14 09:08:31,743 INFO L78 Accepts]: Start accepts. Automaton has 67022 states and 86210 transitions. Word has length 73 [2020-10-14 09:08:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:31,744 INFO L479 AbstractCegarLoop]: Abstraction has 67022 states and 86210 transitions. [2020-10-14 09:08:31,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:08:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 67022 states and 86210 transitions. [2020-10-14 09:08:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:08:31,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:31,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:31,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 09:08:31,750 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:31,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:31,750 INFO L82 PathProgramCache]: Analyzing trace with hash 951369508, now seen corresponding path program 1 times [2020-10-14 09:08:31,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:31,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855253945] [2020-10-14 09:08:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:31,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:31,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:31,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:32,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:32,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:32,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:32,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:32,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:33,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:33,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:33,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:33,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:33,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:33,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:33,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:33,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:35,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:35,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:35,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:36,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:36,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:08:36,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 09:08:36,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:08:36,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:36,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:36,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:08:36,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:08:36,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 09:08:36,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:36,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:36,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:36,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:36,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:36,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:36,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:08:36,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:36,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:36,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:36,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:36,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:08:36,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 09:08:36,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855253945] [2020-10-14 09:08:36,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:36,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:08:36,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693090748] [2020-10-14 09:08:36,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:08:36,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:36,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:08:36,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:08:36,906 INFO L87 Difference]: Start difference. First operand 67022 states and 86210 transitions. Second operand 6 states. [2020-10-14 09:08:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:42,998 INFO L93 Difference]: Finished difference Result 149406 states and 192450 transitions. [2020-10-14 09:08:42,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:08:42,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-14 09:08:42,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:43,089 INFO L225 Difference]: With dead ends: 149406 [2020-10-14 09:08:43,089 INFO L226 Difference]: Without dead ends: 82548 [2020-10-14 09:08:43,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:08:43,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82548 states. [2020-10-14 09:08:51,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82548 to 82274. [2020-10-14 09:08:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82274 states. [2020-10-14 09:08:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82274 states to 82274 states and 104919 transitions. [2020-10-14 09:08:51,125 INFO L78 Accepts]: Start accepts. Automaton has 82274 states and 104919 transitions. Word has length 73 [2020-10-14 09:08:51,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:51,125 INFO L479 AbstractCegarLoop]: Abstraction has 82274 states and 104919 transitions. [2020-10-14 09:08:51,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:08:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 82274 states and 104919 transitions. [2020-10-14 09:08:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:08:51,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:51,131 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:51,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 09:08:51,131 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:51,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash 794421641, now seen corresponding path program 1 times [2020-10-14 09:08:51,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:51,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546152009] [2020-10-14 09:08:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:51,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:51,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:51,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:51,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:51,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:51,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:51,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:51,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:51,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:51,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:52,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:52,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:52,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:52,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:52,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:53,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:53,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:53,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:54,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:54,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:54,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:55,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:55,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:56,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:56,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:08:56,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-14 09:08:56,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 09:08:56,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:56,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:08:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:08:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 09:08:56,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:56,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:56,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:56,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:56,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:56,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:56,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 09:08:56,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:56,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:56,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:56,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:56,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:56,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:56,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546152009] [2020-10-14 09:08:56,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:08:56,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:08:56,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190721704] [2020-10-14 09:08:56,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:08:56,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:56,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:08:56,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:08:56,276 INFO L87 Difference]: Start difference. First operand 82274 states and 104919 transitions. Second operand 6 states. [2020-10-14 09:09:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:05,775 INFO L93 Difference]: Finished difference Result 201283 states and 257044 transitions. [2020-10-14 09:09:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 09:09:05,776 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-14 09:09:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:05,939 INFO L225 Difference]: With dead ends: 201283 [2020-10-14 09:09:05,940 INFO L226 Difference]: Without dead ends: 122415 [2020-10-14 09:09:06,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:09:06,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122415 states. [2020-10-14 09:09:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122415 to 86877. [2020-10-14 09:09:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86877 states. [2020-10-14 09:09:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86877 states to 86877 states and 110079 transitions. [2020-10-14 09:09:15,901 INFO L78 Accepts]: Start accepts. Automaton has 86877 states and 110079 transitions. Word has length 73 [2020-10-14 09:09:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:15,901 INFO L479 AbstractCegarLoop]: Abstraction has 86877 states and 110079 transitions. [2020-10-14 09:09:15,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:09:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 86877 states and 110079 transitions. [2020-10-14 09:09:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:09:15,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:15,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:15,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 09:09:15,907 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:15,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:15,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1375759886, now seen corresponding path program 1 times [2020-10-14 09:09:15,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:15,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403057561] [2020-10-14 09:09:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:15,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:15,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:15,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:15,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:16,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:16,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:16,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:16,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:16,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:17,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:18,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:18,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:18,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:19,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:19,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:19,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:19,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:20,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:20,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:20,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:20,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:20,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:20,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:09:20,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 09:09:20,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:09:20,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:20,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:20,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:09:20,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:09:20,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:09:20,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:21,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:21,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:21,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:21,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:21,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:21,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:09:21,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:21,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:21,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:21,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403057561] [2020-10-14 09:09:21,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:09:21,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:09:21,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897678455] [2020-10-14 09:09:21,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:09:21,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:21,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:09:21,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:09:21,047 INFO L87 Difference]: Start difference. First operand 86877 states and 110079 transitions. Second operand 6 states. [2020-10-14 09:09:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:29,886 INFO L93 Difference]: Finished difference Result 193139 states and 244295 transitions. [2020-10-14 09:09:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 09:09:29,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-14 09:09:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:30,054 INFO L225 Difference]: With dead ends: 193139 [2020-10-14 09:09:30,055 INFO L226 Difference]: Without dead ends: 106294 [2020-10-14 09:09:30,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:09:30,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106294 states. [2020-10-14 09:09:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106294 to 87739. [2020-10-14 09:09:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87739 states. [2020-10-14 09:09:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87739 states to 87739 states and 109632 transitions. [2020-10-14 09:09:37,993 INFO L78 Accepts]: Start accepts. Automaton has 87739 states and 109632 transitions. Word has length 73 [2020-10-14 09:09:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:37,994 INFO L479 AbstractCegarLoop]: Abstraction has 87739 states and 109632 transitions. [2020-10-14 09:09:37,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:09:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 87739 states and 109632 transitions. [2020-10-14 09:09:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:09:38,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:38,000 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:38,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 09:09:38,000 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:38,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash -260338592, now seen corresponding path program 1 times [2020-10-14 09:09:38,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:38,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462860627] [2020-10-14 09:09:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:38,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:38,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:38,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:38,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:38,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:38,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:38,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:38,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:38,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:38,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:39,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:39,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:39,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:39,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:39,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:39,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:40,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:44,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:44,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:09:44,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 09:09:44,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6721 [2020-10-14 09:09:44,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:44,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:44,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:09:44,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:09:44,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 09:09:44,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:44,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:44,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:44,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:44,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:44,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:44,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:09:44,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:44,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:44,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:44,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:44,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:09:44,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 09:09:44,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462860627] [2020-10-14 09:09:44,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:44,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:09:44,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503834146] [2020-10-14 09:09:44,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:09:44,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:44,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:09:44,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:09:44,894 INFO L87 Difference]: Start difference. First operand 87739 states and 109632 transitions. Second operand 6 states. [2020-10-14 09:09:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:50,782 INFO L93 Difference]: Finished difference Result 134170 states and 169171 transitions. [2020-10-14 09:09:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:09:50,783 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-14 09:09:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:50,864 INFO L225 Difference]: With dead ends: 134170 [2020-10-14 09:09:50,865 INFO L226 Difference]: Without dead ends: 68549 [2020-10-14 09:09:50,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 09:09:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68549 states. [2020-10-14 09:09:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68549 to 68475. [2020-10-14 09:09:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68475 states. [2020-10-14 09:09:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68475 states to 68475 states and 85652 transitions. [2020-10-14 09:09:56,378 INFO L78 Accepts]: Start accepts. Automaton has 68475 states and 85652 transitions. Word has length 75 [2020-10-14 09:09:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:56,378 INFO L479 AbstractCegarLoop]: Abstraction has 68475 states and 85652 transitions. [2020-10-14 09:09:56,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:09:56,378 INFO L276 IsEmpty]: Start isEmpty. Operand 68475 states and 85652 transitions. [2020-10-14 09:09:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:09:56,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:56,382 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:56,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 09:09:56,382 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:56,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:56,382 INFO L82 PathProgramCache]: Analyzing trace with hash 686081180, now seen corresponding path program 1 times [2020-10-14 09:09:56,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:56,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863414444] [2020-10-14 09:09:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:56,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:56,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:56,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:57,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:57,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:57,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:57,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:57,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:57,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:58,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:58,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:00,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:00,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:01,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:01,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:10:01,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 09:10:01,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:10:01,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:01,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:01,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 09:10:01,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:10:01,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 09:10:01,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:10:01,666 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2020-10-14 09:10:01,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:10:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:01,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:01,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:01,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:10:01,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:10:01,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:10:01,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:01,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:01,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:10:01,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:10:01,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:10:01,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:10:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:10:01,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863414444] [2020-10-14 09:10:01,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:10:01,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 09:10:01,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596294572] [2020-10-14 09:10:01,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 09:10:01,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:10:01,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 09:10:01,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:10:01,843 INFO L87 Difference]: Start difference. First operand 68475 states and 85652 transitions. Second operand 11 states. [2020-10-14 09:10:02,018 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-14 09:10:04,027 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-10-14 09:10:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:10:26,036 INFO L93 Difference]: Finished difference Result 270641 states and 338864 transitions. [2020-10-14 09:10:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 09:10:26,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-14 09:10:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:10:26,280 INFO L225 Difference]: With dead ends: 270641 [2020-10-14 09:10:26,280 INFO L226 Difference]: Without dead ends: 195931 [2020-10-14 09:10:26,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=406, Invalid=1850, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 09:10:26,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195931 states.