/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 --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 interpolation-heuristic=FIRST --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-eb0fd7c [2020-09-21 11:31:22,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:31:22,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:31:22,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:31:22,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:31:22,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:31:22,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:31:22,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:31:22,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:31:22,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:31:22,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:31:22,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:31:22,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:31:22,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:31:22,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:31:22,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:31:22,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:31:22,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:31:22,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:31:22,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:31:22,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:31:22,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:31:22,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:31:22,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:31:22,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:31:22,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:31:22,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:31:22,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:31:22,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:31:22,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:31:22,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:31:22,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:31:22,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:31:22,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:31:22,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:31:22,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:31:22,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:31:22,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:31:22,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:31:22,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:31:22,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:31:22,561 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 [2020-09-21 11:31:22,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:31:22,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:31:22,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:31:22,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:31:22,612 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:31:22,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:31:22,613 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:31:22,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:31:22,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:31:22,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:31:22,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:31:22,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:31:22,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:31:22,615 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:31:22,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:31:22,616 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:31:22,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:31:22,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:31:22,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:31:22,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:31:22,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:31:22,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:31:22,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:31:22,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:31:22,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:31:22,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:31:22,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:31:22,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:31:22,619 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:31:22,619 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:31:23,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:31:23,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:31:23,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:31:23,101 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:31:23,101 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:31:23,102 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-21 11:31:23,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59e50f793/ddb78d6c6f11442ca69ae072241b9b97/FLAGdaf015c20 [2020-09-21 11:31:23,797 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:31:23,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-21 11:31:23,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59e50f793/ddb78d6c6f11442ca69ae072241b9b97/FLAGdaf015c20 [2020-09-21 11:31:24,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59e50f793/ddb78d6c6f11442ca69ae072241b9b97 [2020-09-21 11:31:24,128 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:31:24,136 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:31:24,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:24,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:31:24,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:31:24,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:24" (1/1) ... [2020-09-21 11:31:24,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ed4b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:24, skipping insertion in model container [2020-09-21 11:31:24,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:24" (1/1) ... [2020-09-21 11:31:24,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:31:24,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:31:24,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:24,452 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:31:24,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:24,627 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:31:24,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:24 WrapperNode [2020-09-21 11:31:24,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:24,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:31:24,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:31:24,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:31:24,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:24" (1/1) ... [2020-09-21 11:31:24,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:24" (1/1) ... [2020-09-21 11:31:24,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:24" (1/1) ... [2020-09-21 11:31:24,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:24" (1/1) ... [2020-09-21 11:31:24,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:24" (1/1) ... [2020-09-21 11:31:24,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:24" (1/1) ... [2020-09-21 11:31:24,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:24" (1/1) ... [2020-09-21 11:31:24,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:31:24,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:31:24,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:31:24,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:31:24,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:24" (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 [2020-09-21 11:31:24,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:31:24,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:31:24,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:31:24,776 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-09-21 11:31:24,777 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-09-21 11:31:24,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:31:24,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:31:24,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:31:24,777 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-09-21 11:31:24,777 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-09-21 11:31:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-09-21 11:31:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-09-21 11:31:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-09-21 11:31:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-09-21 11:31:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-09-21 11:31:24,779 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-09-21 11:31:24,779 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-21 11:31:24,779 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-09-21 11:31:24,779 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-09-21 11:31:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-09-21 11:31:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-09-21 11:31:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-21 11:31:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-09-21 11:31:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-09-21 11:31:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-09-21 11:31:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-09-21 11:31:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-09-21 11:31:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-09-21 11:31:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-09-21 11:31:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-09-21 11:31:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-09-21 11:31:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-09-21 11:31:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-09-21 11:31:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-09-21 11:31:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:31:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:31:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:31:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:31:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:31:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:31:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:31:25,300 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:31:25,300 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 11:31:25,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:25 BoogieIcfgContainer [2020-09-21 11:31:25,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:31:25,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:31:25,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:31:25,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:31:25,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:31:24" (1/3) ... [2020-09-21 11:31:25,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d33e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:25, skipping insertion in model container [2020-09-21 11:31:25,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:24" (2/3) ... [2020-09-21 11:31:25,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d33e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:25, skipping insertion in model container [2020-09-21 11:31:25,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:25" (3/3) ... [2020-09-21 11:31:25,317 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-21 11:31:25,329 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:31:25,340 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:31:25,363 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:31:25,397 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:31:25,398 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:31:25,398 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:31:25,398 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:31:25,398 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:31:25,399 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:31:25,399 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:31:25,399 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:31:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-21 11:31:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 11:31:25,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:25,436 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] [2020-09-21 11:31:25,437 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:25,446 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-09-21 11:31:25,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:25,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502288012] [2020-09-21 11:31:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,676 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,676 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,676 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,677 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:31:25,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:31:25,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:25,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 11:31:25,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:25,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:25,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,783 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,784 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,784 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,784 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:25,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:31:25,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:25,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:25,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:25,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:25,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 11:31:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,802 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,803 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,803 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,803 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:25,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:31:25,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:25,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:25,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:25,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:25,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502288012] [2020-09-21 11:31:25,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:25,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:31:25,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757886904] [2020-09-21 11:31:25,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:31:25,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:25,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:31:25,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:31:25,873 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-09-21 11:31:26,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:26,051 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-09-21 11:31:26,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:31:26,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 11:31:26,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:26,065 INFO L225 Difference]: With dead ends: 93 [2020-09-21 11:31:26,065 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 11:31:26,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:31:26,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 11:31:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-21 11:31:26,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 11:31:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-09-21 11:31:26,128 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-09-21 11:31:26,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:26,129 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-09-21 11:31:26,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:31:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-09-21 11:31:26,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:31:26,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:26,131 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] [2020-09-21 11:31:26,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:31:26,132 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:26,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:26,132 INFO L82 PathProgramCache]: Analyzing trace with hash -171780126, now seen corresponding path program 1 times [2020-09-21 11:31:26,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:26,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866261213] [2020-09-21 11:31:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,175 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,175 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,176 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,176 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:31:26,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:31:26,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:26,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:31:26,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:31:26,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:26,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,231 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,231 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,231 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,232 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:26,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:26,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-21 11:31:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,244 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,245 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,245 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,245 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:26,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:26,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:26,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866261213] [2020-09-21 11:31:26,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:26,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:31:26,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16596273] [2020-09-21 11:31:26,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:31:26,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:26,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:31:26,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:26,261 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-09-21 11:31:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:26,401 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-09-21 11:31:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:31:26,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-09-21 11:31:26,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:26,403 INFO L225 Difference]: With dead ends: 78 [2020-09-21 11:31:26,403 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 11:31:26,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 11:31:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-09-21 11:31:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:31:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 11:31:26,414 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2020-09-21 11:31:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:26,415 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 11:31:26,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:31:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 11:31:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:31:26,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:26,417 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] [2020-09-21 11:31:26,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:31:26,417 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:26,418 INFO L82 PathProgramCache]: Analyzing trace with hash 250921700, now seen corresponding path program 1 times [2020-09-21 11:31:26,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:26,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321466627] [2020-09-21 11:31:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,487 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,487 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,487 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,487 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:31:26,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 11:31:26,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:26,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:31:26,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 11:31:26,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,645 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,648 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,648 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,648 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:31:26,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:26,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-21 11:31:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,670 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,670 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,671 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,671 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:31:26,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:26,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321466627] [2020-09-21 11:31:26,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:26,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 11:31:26,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865334610] [2020-09-21 11:31:26,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:31:26,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:26,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:31:26,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:26,681 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-09-21 11:31:27,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,034 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2020-09-21 11:31:27,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:31:27,035 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-21 11:31:27,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,040 INFO L225 Difference]: With dead ends: 140 [2020-09-21 11:31:27,041 INFO L226 Difference]: Without dead ends: 91 [2020-09-21 11:31:27,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:31:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-21 11:31:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-21 11:31:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-21 11:31:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-09-21 11:31:27,062 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 33 [2020-09-21 11:31:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,063 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-09-21 11:31:27,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:31:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-09-21 11:31:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:31:27,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,064 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] [2020-09-21 11:31:27,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:31:27,065 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1743223006, now seen corresponding path program 1 times [2020-09-21 11:31:27,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287337083] [2020-09-21 11:31:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,111 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,111 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,111 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,112 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:31:27,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:31:27,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:31:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:31:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 11:31:27,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,193 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,193 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,193 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,194 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-21 11:31:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,201 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,202 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,202 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,202 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:27,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287337083] [2020-09-21 11:31:27,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:27,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 11:31:27,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979440163] [2020-09-21 11:31:27,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:27,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:27,212 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 7 states. [2020-09-21 11:31:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,496 INFO L93 Difference]: Finished difference Result 135 states and 179 transitions. [2020-09-21 11:31:27,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:27,496 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-21 11:31:27,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,499 INFO L225 Difference]: With dead ends: 135 [2020-09-21 11:31:27,502 INFO L226 Difference]: Without dead ends: 91 [2020-09-21 11:31:27,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-21 11:31:27,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2020-09-21 11:31:27,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-21 11:31:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-09-21 11:31:27,533 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 33 [2020-09-21 11:31:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,534 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-09-21 11:31:27,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-09-21 11:31:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:31:27,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,537 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] [2020-09-21 11:31:27,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:31:27,538 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1042158428, now seen corresponding path program 1 times [2020-09-21 11:31:27,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958936770] [2020-09-21 11:31:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,603 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,606 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,606 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,607 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:31:27,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-21 11:31:27,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:27,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:31:27,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 11:31:27,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:31:27,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,667 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,667 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,667 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,668 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-21 11:31:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,677 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,677 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,677 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,678 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:27,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958936770] [2020-09-21 11:31:27,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:27,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:31:27,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192155895] [2020-09-21 11:31:27,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:27,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:27,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:27,687 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 6 states. [2020-09-21 11:31:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,936 INFO L93 Difference]: Finished difference Result 186 states and 247 transitions. [2020-09-21 11:31:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:27,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-21 11:31:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,938 INFO L225 Difference]: With dead ends: 186 [2020-09-21 11:31:27,939 INFO L226 Difference]: Without dead ends: 91 [2020-09-21 11:31:27,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-21 11:31:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-09-21 11:31:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-21 11:31:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2020-09-21 11:31:27,966 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 33 [2020-09-21 11:31:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,966 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2020-09-21 11:31:27,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:27,970 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2020-09-21 11:31:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 11:31:27,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,971 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:31:27,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:31:27,972 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1310821647, now seen corresponding path program 1 times [2020-09-21 11:31:27,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072300557] [2020-09-21 11:31:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,055 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,055 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,056 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,056 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 11:31:28,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-21 11:31:28,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:28,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:31:28,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-21 11:31:28,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,206 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,207 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,207 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,207 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 11:31:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,216 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,216 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,217 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,217 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:28,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:28,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:31:28,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:31:28,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072300557] [2020-09-21 11:31:28,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:28,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 11:31:28,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955572430] [2020-09-21 11:31:28,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:31:28,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:31:28,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:28,227 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand 8 states. [2020-09-21 11:31:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:28,479 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2020-09-21 11:31:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:31:28,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-09-21 11:31:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:28,481 INFO L225 Difference]: With dead ends: 104 [2020-09-21 11:31:28,482 INFO L226 Difference]: Without dead ends: 102 [2020-09-21 11:31:28,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:31:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-21 11:31:28,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2020-09-21 11:31:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-21 11:31:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2020-09-21 11:31:28,493 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 38 [2020-09-21 11:31:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:28,494 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2020-09-21 11:31:28,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:31:28,494 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2020-09-21 11:31:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 11:31:28,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:28,497 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:31:28,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:31:28,498 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1909797290, now seen corresponding path program 1 times [2020-09-21 11:31:28,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:28,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818105674] [2020-09-21 11:31:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,557 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,557 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,558 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,558 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-21 11:31:28,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 11:31:28,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:28,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:31:28,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 11:31:28,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,640 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,641 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,641 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,641 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 11:31:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,648 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,649 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,649 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,649 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:28,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:28,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818105674] [2020-09-21 11:31:28,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:28,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:31:28,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424803234] [2020-09-21 11:31:28,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:31:28,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:31:28,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:28,657 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand 8 states. [2020-09-21 11:31:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:28,862 INFO L93 Difference]: Finished difference Result 207 states and 262 transitions. [2020-09-21 11:31:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:31:28,863 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-09-21 11:31:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:28,866 INFO L225 Difference]: With dead ends: 207 [2020-09-21 11:31:28,867 INFO L226 Difference]: Without dead ends: 136 [2020-09-21 11:31:28,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:31:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-21 11:31:28,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2020-09-21 11:31:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-21 11:31:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2020-09-21 11:31:28,887 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 40 [2020-09-21 11:31:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:28,890 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2020-09-21 11:31:28,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:31:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2020-09-21 11:31:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 11:31:28,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:28,895 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-21 11:31:28,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:31:28,896 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:28,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1746971937, now seen corresponding path program 2 times [2020-09-21 11:31:28,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:28,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112731631] [2020-09-21 11:31:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,926 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,926 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,927 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,927 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 11:31:28,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:28,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:31:28,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-21 11:31:28,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 11:31:28,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,964 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,965 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,965 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,965 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 11:31:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,972 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,972 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,973 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,973 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:28,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-21 11:31:28,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112731631] [2020-09-21 11:31:28,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:28,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:31:28,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139719015] [2020-09-21 11:31:28,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:28,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:28,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:28,981 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand 5 states. [2020-09-21 11:31:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:29,082 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2020-09-21 11:31:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:29,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-09-21 11:31:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:29,085 INFO L225 Difference]: With dead ends: 152 [2020-09-21 11:31:29,085 INFO L226 Difference]: Without dead ends: 111 [2020-09-21 11:31:29,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-21 11:31:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-09-21 11:31:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-21 11:31:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2020-09-21 11:31:29,096 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 45 [2020-09-21 11:31:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:29,096 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2020-09-21 11:31:29,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2020-09-21 11:31:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 11:31:29,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:29,098 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-21 11:31:29,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:31:29,098 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:29,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:29,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 1 times [2020-09-21 11:31:29,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:29,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551188214] [2020-09-21 11:31:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,173 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,174 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,174 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,174 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 11:31:29,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-21 11:31:29,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:31:29,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:31:29,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-21 11:31:29,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,286 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,287 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,287 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,287 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:29,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:29,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:29,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:29,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:29,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 11:31:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,295 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,295 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,295 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,296 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:29,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:29,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:29,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:29,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:31:29,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:29,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551188214] [2020-09-21 11:31:29,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:29,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:31:29,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99971797] [2020-09-21 11:31:29,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:31:29,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:29,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:31:29,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:29,306 INFO L87 Difference]: Start difference. First operand 111 states and 135 transitions. Second operand 11 states. [2020-09-21 11:31:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:29,869 INFO L93 Difference]: Finished difference Result 362 states and 467 transitions. [2020-09-21 11:31:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:31:29,869 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-09-21 11:31:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:29,871 INFO L225 Difference]: With dead ends: 362 [2020-09-21 11:31:29,872 INFO L226 Difference]: Without dead ends: 228 [2020-09-21 11:31:29,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:31:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-21 11:31:29,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 156. [2020-09-21 11:31:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-21 11:31:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 190 transitions. [2020-09-21 11:31:29,900 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 190 transitions. Word has length 45 [2020-09-21 11:31:29,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:29,900 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 190 transitions. [2020-09-21 11:31:29,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:31:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 190 transitions. [2020-09-21 11:31:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 11:31:29,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:29,905 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-21 11:31:29,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:31:29,905 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:29,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-09-21 11:31:29,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:29,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930893636] [2020-09-21 11:31:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,987 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,988 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,988 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,988 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 11:31:29,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-21 11:31:29,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:31:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:31:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-21 11:31:29,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,140 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,141 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,141 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,141 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:30,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:30,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:30,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:30,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:30,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 11:31:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,165 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,165 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,165 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,166 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:30,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:31:30,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:30,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:30,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:31:30,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:30,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930893636] [2020-09-21 11:31:30,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:30,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:31:30,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368950240] [2020-09-21 11:31:30,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:31:30,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:30,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:31:30,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:30,182 INFO L87 Difference]: Start difference. First operand 156 states and 190 transitions. Second operand 11 states. [2020-09-21 11:31:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:30,791 INFO L93 Difference]: Finished difference Result 250 states and 311 transitions. [2020-09-21 11:31:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:31:30,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-09-21 11:31:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:30,796 INFO L225 Difference]: With dead ends: 250 [2020-09-21 11:31:30,797 INFO L226 Difference]: Without dead ends: 248 [2020-09-21 11:31:30,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:31:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-21 11:31:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 190. [2020-09-21 11:31:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-21 11:31:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 240 transitions. [2020-09-21 11:31:30,812 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 240 transitions. Word has length 45 [2020-09-21 11:31:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:30,812 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 240 transitions. [2020-09-21 11:31:30,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:31:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 240 transitions. [2020-09-21 11:31:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 11:31:30,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:30,814 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-21 11:31:30,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:31:30,814 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:30,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-09-21 11:31:30,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:30,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421929205] [2020-09-21 11:31:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:31:30,839 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:31:30,839 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:31:30,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:31:30,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:31:30 BoogieIcfgContainer [2020-09-21 11:31:30,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:31:30,872 INFO L168 Benchmark]: Toolchain (without parser) took 6740.72 ms. Allocated memory was 148.9 MB in the beginning and 275.3 MB in the end (delta: 126.4 MB). Free memory was 103.5 MB in the beginning and 219.7 MB in the end (delta: -116.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:30,873 INFO L168 Benchmark]: CDTParser took 0.90 ms. Allocated memory is still 148.9 MB. Free memory was 122.2 MB in the beginning and 121.8 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-21 11:31:30,874 INFO L168 Benchmark]: CACSL2BoogieTranslator took 490.97 ms. Allocated memory was 148.9 MB in the beginning and 206.0 MB in the end (delta: 57.1 MB). Free memory was 103.1 MB in the beginning and 182.4 MB in the end (delta: -79.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:30,874 INFO L168 Benchmark]: Boogie Preprocessor took 58.14 ms. Allocated memory is still 206.0 MB. Free memory was 182.4 MB in the beginning and 180.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:30,875 INFO L168 Benchmark]: RCFGBuilder took 619.11 ms. Allocated memory is still 206.0 MB. Free memory was 180.6 MB in the beginning and 153.2 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:30,876 INFO L168 Benchmark]: TraceAbstraction took 5560.50 ms. Allocated memory was 206.0 MB in the beginning and 275.3 MB in the end (delta: 69.2 MB). Free memory was 152.3 MB in the beginning and 219.7 MB in the end (delta: -67.4 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:30,880 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.90 ms. Allocated memory is still 148.9 MB. Free memory was 122.2 MB in the beginning and 121.8 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 490.97 ms. Allocated memory was 148.9 MB in the beginning and 206.0 MB in the end (delta: 57.1 MB). Free memory was 103.1 MB in the beginning and 182.4 MB in the end (delta: -79.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.14 ms. Allocated memory is still 206.0 MB. Free memory was 182.4 MB in the beginning and 180.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 619.11 ms. Allocated memory is still 206.0 MB. Free memory was 180.6 MB in the beginning and 153.2 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5560.50 ms. Allocated memory was 206.0 MB in the beginning and 275.3 MB in the end (delta: 69.2 MB). Free memory was 152.3 MB in the beginning and 219.7 MB in the end (delta: -67.4 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 [L76] CALL parse_expression_list (A) [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; [L50] COND FALSE !(!str) [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j [L61] CALL r_strncpy(str2, str+start, j-start+1) [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) [L62] CALL __VERIFIER_assert(j - start + 1 < 2) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.4s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 461 SDtfs, 958 SDslu, 1065 SDs, 0 SdLazy, 1674 SolverSat, 269 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=190occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 220 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 419 NumberOfCodeBlocks, 419 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 364 ConstructedInterpolants, 0 QuantifiedInterpolants, 34597 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 11/31 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...