/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:50:14,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:50:14,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:50:14,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:50:14,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:50:14,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:50:14,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:50:14,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:50:14,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:50:14,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:50:14,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:50:14,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:50:14,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:50:14,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:50:14,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:50:14,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:50:14,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:50:14,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:50:14,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:50:14,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:50:14,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:50:14,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:50:14,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:50:14,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:50:14,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:50:14,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:50:14,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:50:14,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:50:14,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:50:14,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:50:14,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:50:14,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:50:14,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:50:14,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:50:14,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:50:14,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:50:14,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:50:14,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:50:14,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:50:14,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:50:14,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:50:14,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:50:14,671 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:50:14,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:50:14,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:50:14,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:50:14,673 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:50:14,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:50:14,673 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:50:14,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:50:14,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:50:14,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:50:14,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:50:14,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:50:14,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:50:14,675 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:50:14,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:50:14,675 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:50:14,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:50:14,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:50:14,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:50:14,676 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:50:14,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:50:14,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:50:14,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:50:14,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:50:14,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:50:14,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:50:14,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:50:14,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:50:14,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:50:14,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:50:15,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:50:15,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:50:15,180 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:50:15,183 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:50:15,184 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:50:15,186 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 21:50:15,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ead0db702/3e690c77f03548c2bfe7f5e3e17a9d7f/FLAGdbc98caa7 [2020-09-24 21:50:15,848 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:50:15,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 21:50:15,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ead0db702/3e690c77f03548c2bfe7f5e3e17a9d7f/FLAGdbc98caa7 [2020-09-24 21:50:16,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ead0db702/3e690c77f03548c2bfe7f5e3e17a9d7f [2020-09-24 21:50:16,156 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:50:16,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:50:16,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:16,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:50:16,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:50:16,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:16" (1/1) ... [2020-09-24 21:50:16,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11967da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:16, skipping insertion in model container [2020-09-24 21:50:16,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:16" (1/1) ... [2020-09-24 21:50:16,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:50:16,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:50:16,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:16,476 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:50:16,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:16,632 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:50:16,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:16 WrapperNode [2020-09-24 21:50:16,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:16,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:50:16,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:50:16,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:50:16,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:16" (1/1) ... [2020-09-24 21:50:16,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:16" (1/1) ... [2020-09-24 21:50:16,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:16" (1/1) ... [2020-09-24 21:50:16,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:16" (1/1) ... [2020-09-24 21:50:16,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:16" (1/1) ... [2020-09-24 21:50:16,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:16" (1/1) ... [2020-09-24 21:50:16,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:16" (1/1) ... [2020-09-24 21:50:16,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:50:16,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:50:16,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:50:16,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:50:16,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:50:16,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:50:16,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:50:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:50:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-09-24 21:50:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-09-24 21:50:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:50:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:50:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:50:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-09-24 21:50:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-09-24 21:50:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-09-24 21:50:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-09-24 21:50:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-09-24 21:50:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-09-24 21:50:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-09-24 21:50:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-09-24 21:50:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-24 21:50:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-09-24 21:50:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-09-24 21:50:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-09-24 21:50:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-09-24 21:50:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-24 21:50:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-09-24 21:50:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-09-24 21:50:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-09-24 21:50:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-09-24 21:50:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-09-24 21:50:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-09-24 21:50:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-09-24 21:50:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-09-24 21:50:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-09-24 21:50:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-09-24 21:50:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-09-24 21:50:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-09-24 21:50:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:50:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:50:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:50:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:50:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:50:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:50:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:50:17,243 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:50:17,244 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 21:50:17,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:17 BoogieIcfgContainer [2020-09-24 21:50:17,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:50:17,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:50:17,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:50:17,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:50:17,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:50:16" (1/3) ... [2020-09-24 21:50:17,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f409435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:17, skipping insertion in model container [2020-09-24 21:50:17,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:16" (2/3) ... [2020-09-24 21:50:17,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f409435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:17, skipping insertion in model container [2020-09-24 21:50:17,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:17" (3/3) ... [2020-09-24 21:50:17,260 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 21:50:17,272 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:50:17,282 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:50:17,304 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:50:17,337 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:50:17,337 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:50:17,338 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:50:17,338 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:50:17,338 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:50:17,338 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:50:17,338 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:50:17,339 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:50:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-09-24 21:50:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 21:50:17,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:17,374 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] [2020-09-24 21:50:17,375 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:17,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2116113079, now seen corresponding path program 1 times [2020-09-24 21:50:17,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:17,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370090646] [2020-09-24 21:50:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:17,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:17,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:17,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:18,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:18,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:18,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:19,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:19,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 21:50:19,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:50:19,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2059 [2020-09-24 21:50:19,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:19,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:50:19,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:50:19,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:50:19,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:50:19,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:19,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:19,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:19,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:19,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:19,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 21:50:19,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:19,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:19,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:19,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:19,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:19,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 21:50:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:19,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:19,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:19,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:19,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:19,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:50:19,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:19,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:19,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:19,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:19,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:19,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370090646] [2020-09-24 21:50:19,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:19,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 21:50:19,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459828357] [2020-09-24 21:50:19,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:50:19,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:19,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:50:19,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:19,916 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 8 states. [2020-09-24 21:50:20,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:20,571 INFO L93 Difference]: Finished difference Result 435 states and 509 transitions. [2020-09-24 21:50:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:50:20,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-09-24 21:50:20,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:20,589 INFO L225 Difference]: With dead ends: 435 [2020-09-24 21:50:20,590 INFO L226 Difference]: Without dead ends: 279 [2020-09-24 21:50:20,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:50:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-09-24 21:50:20,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 139. [2020-09-24 21:50:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-24 21:50:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 156 transitions. [2020-09-24 21:50:20,675 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 156 transitions. Word has length 48 [2020-09-24 21:50:20,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:20,676 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 156 transitions. [2020-09-24 21:50:20,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:50:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 156 transitions. [2020-09-24 21:50:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 21:50:20,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:20,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:20,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:50:20,680 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:20,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:20,681 INFO L82 PathProgramCache]: Analyzing trace with hash -53936734, now seen corresponding path program 1 times [2020-09-24 21:50:20,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:20,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587739662] [2020-09-24 21:50:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:20,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:25,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:25,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 21:50:25,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:50:25,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-24 21:50:25,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:25,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:25,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:50:25,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:50:25,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:25,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:25,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:25,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:25,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:25,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:25,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:25,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:25,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:25,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:25,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:25,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:25,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 21:50:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:25,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:25,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:25,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:25,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:25,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:50:25,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:25,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:25,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:25,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:25,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:25,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587739662] [2020-09-24 21:50:25,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:25,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-24 21:50:25,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832147718] [2020-09-24 21:50:25,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:50:25,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:25,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:50:25,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:25,965 INFO L87 Difference]: Start difference. First operand 139 states and 156 transitions. Second operand 12 states. [2020-09-24 21:50:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:27,139 INFO L93 Difference]: Finished difference Result 451 states and 512 transitions. [2020-09-24 21:50:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 21:50:27,140 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-09-24 21:50:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:27,144 INFO L225 Difference]: With dead ends: 451 [2020-09-24 21:50:27,144 INFO L226 Difference]: Without dead ends: 339 [2020-09-24 21:50:27,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 21:50:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-09-24 21:50:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 153. [2020-09-24 21:50:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-24 21:50:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 170 transitions. [2020-09-24 21:50:27,163 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 170 transitions. Word has length 63 [2020-09-24 21:50:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:27,164 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 170 transitions. [2020-09-24 21:50:27,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:50:27,164 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 170 transitions. [2020-09-24 21:50:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 21:50:27,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:27,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:27,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:50:27,167 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:27,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1116699365, now seen corresponding path program 1 times [2020-09-24 21:50:27,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:27,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505822154] [2020-09-24 21:50:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:27,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:27,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:27,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:27,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:27,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:27,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:32,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:32,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 21:50:32,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:50:32,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-24 21:50:32,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:32,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:50:32,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:50:32,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 21:50:32,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:32,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:32,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:32,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:32,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:32,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:32,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:50:32,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:32,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:32,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:32,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:32,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:50:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:32,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:32,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:32,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:32,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:32,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:50:32,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:32,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:32,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:32,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:32,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505822154] [2020-09-24 21:50:32,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:32,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 21:50:32,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857731177] [2020-09-24 21:50:32,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:50:32,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:32,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:50:32,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:50:32,412 INFO L87 Difference]: Start difference. First operand 153 states and 170 transitions. Second operand 11 states. [2020-09-24 21:50:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:33,261 INFO L93 Difference]: Finished difference Result 433 states and 487 transitions. [2020-09-24 21:50:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 21:50:33,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-09-24 21:50:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:33,264 INFO L225 Difference]: With dead ends: 433 [2020-09-24 21:50:33,264 INFO L226 Difference]: Without dead ends: 333 [2020-09-24 21:50:33,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:50:33,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-09-24 21:50:33,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 161. [2020-09-24 21:50:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-24 21:50:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2020-09-24 21:50:33,294 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 65 [2020-09-24 21:50:33,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:33,294 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2020-09-24 21:50:33,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:50:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2020-09-24 21:50:33,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 21:50:33,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:33,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:33,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:50:33,299 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:33,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1492663361, now seen corresponding path program 1 times [2020-09-24 21:50:33,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:33,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501424330] [2020-09-24 21:50:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:33,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:33,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:33,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:33,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:33,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:33,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:33,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:34,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:35,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:35,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:35,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:35,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:37,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:37,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 21:50:37,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 21:50:37,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3756 [2020-09-24 21:50:37,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:37,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:50:37,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:50:37,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 21:50:37,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:37,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:37,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:37,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:37,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:37,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:37,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:50:37,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:37,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:37,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:50:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:37,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:37,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:37,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:37,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:37,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:50:37,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:37,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:37,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:37,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:37,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:37,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501424330] [2020-09-24 21:50:37,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:37,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 21:50:37,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504046639] [2020-09-24 21:50:37,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:50:37,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:37,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:50:37,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:50:37,199 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand 10 states. [2020-09-24 21:50:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:37,813 INFO L93 Difference]: Finished difference Result 401 states and 447 transitions. [2020-09-24 21:50:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 21:50:37,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-09-24 21:50:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:37,816 INFO L225 Difference]: With dead ends: 401 [2020-09-24 21:50:37,817 INFO L226 Difference]: Without dead ends: 278 [2020-09-24 21:50:37,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-24 21:50:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-09-24 21:50:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 152. [2020-09-24 21:50:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-24 21:50:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 167 transitions. [2020-09-24 21:50:37,830 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 167 transitions. Word has length 65 [2020-09-24 21:50:37,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:37,831 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 167 transitions. [2020-09-24 21:50:37,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:50:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 167 transitions. [2020-09-24 21:50:37,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 21:50:37,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:37,833 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] [2020-09-24 21:50:37,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:50:37,833 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:37,834 INFO L82 PathProgramCache]: Analyzing trace with hash -624749260, now seen corresponding path program 1 times [2020-09-24 21:50:37,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:37,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054085711] [2020-09-24 21:50:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:37,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:37,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:37,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:37,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:38,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:38,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:41,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:41,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 21:50:41,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:50:41,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3884 [2020-09-24 21:50:41,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:41,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:41,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:50:41,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-09-24 21:50:41,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:41,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:41,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:41,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:41,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:41,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:41,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:50:41,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:41,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:41,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:41,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:41,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:41,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-24 21:50:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:41,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:41,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:41,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:41,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:41,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 21:50:41,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:41,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:50:41,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:41,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:50:41,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:41,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054085711] [2020-09-24 21:50:41,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:41,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:50:41,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692491251] [2020-09-24 21:50:41,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:50:41,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:41,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:50:41,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:41,909 INFO L87 Difference]: Start difference. First operand 152 states and 167 transitions. Second operand 12 states. [2020-09-24 21:50:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:43,093 INFO L93 Difference]: Finished difference Result 584 states and 666 transitions. [2020-09-24 21:50:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 21:50:43,094 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-09-24 21:50:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:43,099 INFO L225 Difference]: With dead ends: 584 [2020-09-24 21:50:43,099 INFO L226 Difference]: Without dead ends: 582 [2020-09-24 21:50:43,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 21:50:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2020-09-24 21:50:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 204. [2020-09-24 21:50:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-24 21:50:43,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 229 transitions. [2020-09-24 21:50:43,136 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 229 transitions. Word has length 71 [2020-09-24 21:50:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:43,137 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 229 transitions. [2020-09-24 21:50:43,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:50:43,137 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 229 transitions. [2020-09-24 21:50:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 21:50:43,141 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:43,141 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-09-24 21:50:43,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:50:43,141 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:43,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:43,144 INFO L82 PathProgramCache]: Analyzing trace with hash -272178825, now seen corresponding path program 1 times [2020-09-24 21:50:43,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:43,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942775292] [2020-09-24 21:50:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:43,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:43,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:43,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:43,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:43,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:43,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:43,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:44,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:45,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:45,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:48,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:48,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 21:50:48,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:50:48,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:50:48,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:48,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:50:48,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:50:48,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 21:50:48,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:48,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:48,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:48,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:48,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:48,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:48,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:48,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:48,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:48,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 21:50:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:48,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:48,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:48,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:48,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:48,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:48,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:48,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:48,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942775292] [2020-09-24 21:50:48,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:48,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 21:50:48,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019512342] [2020-09-24 21:50:48,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:50:48,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:48,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:50:48,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:50:48,258 INFO L87 Difference]: Start difference. First operand 204 states and 229 transitions. Second operand 10 states. [2020-09-24 21:50:49,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:49,095 INFO L93 Difference]: Finished difference Result 609 states and 696 transitions. [2020-09-24 21:50:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 21:50:49,096 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-09-24 21:50:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:49,105 INFO L225 Difference]: With dead ends: 609 [2020-09-24 21:50:49,105 INFO L226 Difference]: Without dead ends: 440 [2020-09-24 21:50:49,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:50:49,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-09-24 21:50:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 231. [2020-09-24 21:50:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-09-24 21:50:49,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 260 transitions. [2020-09-24 21:50:49,130 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 260 transitions. Word has length 72 [2020-09-24 21:50:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:49,131 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 260 transitions. [2020-09-24 21:50:49,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:50:49,131 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 260 transitions. [2020-09-24 21:50:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 21:50:49,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:49,133 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-09-24 21:50:49,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:50:49,133 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1197654620, now seen corresponding path program 1 times [2020-09-24 21:50:49,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:49,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266781072] [2020-09-24 21:50:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:49,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:49,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:49,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:49,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:49,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:49,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:49,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:54,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:54,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 21:50:54,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:50:54,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:50:54,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:54,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:54,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:50:54,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:50:54,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:54,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:54,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:54,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:54,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:54,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:54,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:50:54,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:54,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:54,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:54,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:54,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:54,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 21:50:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:54,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:54,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:54,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:54,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:54,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:50:54,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:54,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:54,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:54,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:54,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:54,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266781072] [2020-09-24 21:50:54,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:54,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-24 21:50:54,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513013100] [2020-09-24 21:50:54,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:50:54,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:54,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:50:54,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:54,307 INFO L87 Difference]: Start difference. First operand 231 states and 260 transitions. Second operand 12 states. [2020-09-24 21:50:55,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:55,350 INFO L93 Difference]: Finished difference Result 583 states and 667 transitions. [2020-09-24 21:50:55,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 21:50:55,351 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2020-09-24 21:50:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:55,353 INFO L225 Difference]: With dead ends: 583 [2020-09-24 21:50:55,354 INFO L226 Difference]: Without dead ends: 396 [2020-09-24 21:50:55,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 21:50:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-09-24 21:50:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 231. [2020-09-24 21:50:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-09-24 21:50:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 258 transitions. [2020-09-24 21:50:55,366 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 258 transitions. Word has length 72 [2020-09-24 21:50:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:55,366 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 258 transitions. [2020-09-24 21:50:55,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:50:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 258 transitions. [2020-09-24 21:50:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-24 21:50:55,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:55,368 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] [2020-09-24 21:50:55,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:50:55,368 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:55,368 INFO L82 PathProgramCache]: Analyzing trace with hash 411690812, now seen corresponding path program 1 times [2020-09-24 21:50:55,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:55,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740366241] [2020-09-24 21:50:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:55,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:55,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:55,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:55,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:55,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:55,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:56,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:59,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:59,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:59,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:59,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:59,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:00,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:00,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 21:51:00,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 21:51:00,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-24 21:51:00,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:00,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:51:00,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:51:00,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 21:51:00,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:00,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:00,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:00,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:00,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:51:00,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:00,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:51:00,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:00,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:00,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:00,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:00,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:51:00,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 21:51:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:00,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:00,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:00,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:51:00,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:00,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:51:00,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:00,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:00,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:51:00,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:00,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:00,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740366241] [2020-09-24 21:51:00,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:00,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 21:51:00,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689262843] [2020-09-24 21:51:00,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:51:00,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:00,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:51:00,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:51:00,518 INFO L87 Difference]: Start difference. First operand 231 states and 258 transitions. Second operand 11 states. [2020-09-24 21:51:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:01,582 INFO L93 Difference]: Finished difference Result 779 states and 888 transitions. [2020-09-24 21:51:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 21:51:01,584 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-09-24 21:51:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:01,589 INFO L225 Difference]: With dead ends: 779 [2020-09-24 21:51:01,589 INFO L226 Difference]: Without dead ends: 589 [2020-09-24 21:51:01,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:51:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-09-24 21:51:01,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 245. [2020-09-24 21:51:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-09-24 21:51:01,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 275 transitions. [2020-09-24 21:51:01,618 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 275 transitions. Word has length 74 [2020-09-24 21:51:01,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:01,620 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 275 transitions. [2020-09-24 21:51:01,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:51:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 275 transitions. [2020-09-24 21:51:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-24 21:51:01,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:01,623 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] [2020-09-24 21:51:01,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:51:01,623 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:01,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:01,624 INFO L82 PathProgramCache]: Analyzing trace with hash 787654808, now seen corresponding path program 1 times [2020-09-24 21:51:01,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:01,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426393086] [2020-09-24 21:51:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:01,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:01,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:01,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:01,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:02,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:02,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:02,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:02,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:04,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:04,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:04,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:04,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:06,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:06,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 21:51:06,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 21:51:06,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:51:06,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:06,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:51:06,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:51:06,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 21:51:06,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:06,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:06,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:06,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:06,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:51:06,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:06,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:51:06,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:06,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:06,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:06,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:06,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:06,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 21:51:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:06,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:06,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:06,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:51:06,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:06,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:51:06,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:06,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:06,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:51:06,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:06,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:06,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426393086] [2020-09-24 21:51:06,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:06,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:51:06,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221344869] [2020-09-24 21:51:06,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:51:06,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:06,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:51:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:51:06,782 INFO L87 Difference]: Start difference. First operand 245 states and 275 transitions. Second operand 12 states.