/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:43:12,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:43:12,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:43:12,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:43:12,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:43:12,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:43:12,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:43:12,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:43:12,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:43:12,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:43:12,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:43:12,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:43:12,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:43:12,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:43:12,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:43:12,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:43:12,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:43:12,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:43:12,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:43:12,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:43:12,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:43:12,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:43:12,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:43:12,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:43:12,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:43:12,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:43:12,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:43:12,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:43:12,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:43:12,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:43:12,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:43:12,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:43:12,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:43:12,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:43:12,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:43:12,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:43:12,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:43:12,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:43:12,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:43:12,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:43:12,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:43:12,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 05:43:12,761 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:43:12,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:43:12,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:43:12,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:43:12,764 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:43:12,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:43:12,765 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:43:12,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:43:12,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:43:12,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:43:12,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:43:12,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:43:12,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:43:12,768 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:43:12,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:43:12,768 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:43:12,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:43:12,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:43:12,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:43:12,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:43:12,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:43:12,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:43:12,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:43:12,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:43:12,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:43:12,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:43:12,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:43:12,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:43:12,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:43:12,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:43:13,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:43:13,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:43:13,293 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:43:13,295 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:43:13,296 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:43:13,297 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 05:43:13,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b64469552/48519f45fc8a4bceb1861a3faa327fbf/FLAG9e2017007 [2020-09-25 05:43:13,966 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:43:13,967 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 05:43:13,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b64469552/48519f45fc8a4bceb1861a3faa327fbf/FLAG9e2017007 [2020-09-25 05:43:14,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b64469552/48519f45fc8a4bceb1861a3faa327fbf [2020-09-25 05:43:14,324 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:43:14,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:43:14,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:43:14,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:43:14,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:43:14,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:43:14" (1/1) ... [2020-09-25 05:43:14,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29eb21d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:14, skipping insertion in model container [2020-09-25 05:43:14,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:43:14" (1/1) ... [2020-09-25 05:43:14,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:43:14,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:43:14,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:43:14,615 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:43:14,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:43:14,675 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:43:14,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:14 WrapperNode [2020-09-25 05:43:14,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:43:14,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:43:14,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:43:14,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:43:14,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:14" (1/1) ... [2020-09-25 05:43:14,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:14" (1/1) ... [2020-09-25 05:43:14,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:14" (1/1) ... [2020-09-25 05:43:14,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:14" (1/1) ... [2020-09-25 05:43:14,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:14" (1/1) ... [2020-09-25 05:43:14,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:14" (1/1) ... [2020-09-25 05:43:14,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:14" (1/1) ... [2020-09-25 05:43:14,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:43:14,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:43:14,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:43:14,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:43:14,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:43:14,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:43:14,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:43:14,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 05:43:14,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:43:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:43:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 05:43:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 05:43:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 05:43:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 05:43:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:43:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 05:43:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 05:43:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 05:43:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 05:43:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:43:14,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:43:15,291 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:43:15,292 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 05:43:15,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:43:15 BoogieIcfgContainer [2020-09-25 05:43:15,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:43:15,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:43:15,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:43:15,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:43:15,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:43:14" (1/3) ... [2020-09-25 05:43:15,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248c4c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:43:15, skipping insertion in model container [2020-09-25 05:43:15,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:14" (2/3) ... [2020-09-25 05:43:15,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248c4c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:43:15, skipping insertion in model container [2020-09-25 05:43:15,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:43:15" (3/3) ... [2020-09-25 05:43:15,307 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-09-25 05:43:15,319 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:43:15,328 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:43:15,347 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:43:15,374 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:43:15,374 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:43:15,375 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:43:15,375 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:43:15,375 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:43:15,375 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:43:15,375 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:43:15,375 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:43:15,397 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-25 05:43:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 05:43:15,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:15,407 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] [2020-09-25 05:43:15,407 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:15,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:15,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1584943199, now seen corresponding path program 1 times [2020-09-25 05:43:15,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:15,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287234962] [2020-09-25 05:43:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:15,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:15,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:15,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:16,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:16,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 05:43:16,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 05:43:16,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-09-25 05:43:16,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:16,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 05:43:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:16,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 05:43:16,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:16,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:16,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:16,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:43:16,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:16,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 05:43:16,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:16,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:16,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:16,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:16,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:16,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:16,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287234962] [2020-09-25 05:43:16,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:43:16,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 05:43:16,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607454255] [2020-09-25 05:43:16,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 05:43:16,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:16,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 05:43:16,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 05:43:16,523 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 3 states. [2020-09-25 05:43:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:16,718 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-09-25 05:43:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 05:43:16,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-25 05:43:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:16,730 INFO L225 Difference]: With dead ends: 121 [2020-09-25 05:43:16,731 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 05:43:16,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 05:43:16,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 05:43:16,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-25 05:43:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 05:43:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-25 05:43:16,786 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 31 [2020-09-25 05:43:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:16,787 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-25 05:43:16,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 05:43:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-25 05:43:16,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 05:43:16,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:16,789 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] [2020-09-25 05:43:16,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:43:16,790 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:16,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:16,791 INFO L82 PathProgramCache]: Analyzing trace with hash -318765620, now seen corresponding path program 1 times [2020-09-25 05:43:16,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:16,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083422230] [2020-09-25 05:43:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:16,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:16,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:16,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:17,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:17,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:17,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 05:43:17,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 05:43:17,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-09-25 05:43:17,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:17,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:17,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:43:17,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 05:43:17,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 05:43:17,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:17,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:17,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:17,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:17,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:43:17,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:17,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 05:43:17,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:17,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:17,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:17,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:17,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:17,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:17,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083422230] [2020-09-25 05:43:17,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:43:17,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:43:17,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040368253] [2020-09-25 05:43:17,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:43:17,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:17,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:43:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:43:17,304 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 5 states. [2020-09-25 05:43:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:17,544 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-09-25 05:43:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:43:17,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-25 05:43:17,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:17,549 INFO L225 Difference]: With dead ends: 95 [2020-09-25 05:43:17,549 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 05:43:17,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:43:17,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 05:43:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-09-25 05:43:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 05:43:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 05:43:17,567 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2020-09-25 05:43:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:17,568 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 05:43:17,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:43:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 05:43:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 05:43:17,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:17,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:17,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:43:17,570 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:17,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:17,571 INFO L82 PathProgramCache]: Analyzing trace with hash 419131922, now seen corresponding path program 1 times [2020-09-25 05:43:17,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:17,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414727125] [2020-09-25 05:43:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:17,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:17,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:17,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:17,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:18,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:18,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:19,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:19,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 05:43:19,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 05:43:19,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1527 [2020-09-25 05:43:19,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:19,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:19,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:43:19,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 05:43:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 05:43:19,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:19,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:19,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:19,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:19,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:43:19,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:19,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 05:43:19,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:19,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:19,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 05:43:19,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414727125] [2020-09-25 05:43:19,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:43:19,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 05:43:19,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543902011] [2020-09-25 05:43:19,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 05:43:19,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:19,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 05:43:19,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:43:19,195 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 6 states. [2020-09-25 05:43:19,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:19,443 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2020-09-25 05:43:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 05:43:19,443 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-25 05:43:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:19,445 INFO L225 Difference]: With dead ends: 118 [2020-09-25 05:43:19,445 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 05:43:19,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:43:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 05:43:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-09-25 05:43:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 05:43:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-09-25 05:43:19,455 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 41 [2020-09-25 05:43:19,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:19,456 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-09-25 05:43:19,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 05:43:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-09-25 05:43:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 05:43:19,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:19,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:19,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:43:19,458 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:19,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2141827952, now seen corresponding path program 1 times [2020-09-25 05:43:19,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:19,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147884923] [2020-09-25 05:43:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:19,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:19,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:19,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:20,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:21,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:22,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:22,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:22,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:24,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:24,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 05:43:24,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 05:43:24,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 05:43:24,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:24,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:24,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 05:43:24,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 05:43:24,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 05:43:24,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:43:25,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:25,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:25,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:25,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:43:25,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:25,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 05:43:25,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:25,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:25,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:25,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:25,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:25,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 05:43:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:25,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147884923] [2020-09-25 05:43:25,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:25,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 05:43:25,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448777182] [2020-09-25 05:43:25,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 05:43:25,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:25,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 05:43:25,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-25 05:43:25,078 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 17 states. [2020-09-25 05:43:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:26,422 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2020-09-25 05:43:26,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 05:43:26,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-09-25 05:43:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:26,426 INFO L225 Difference]: With dead ends: 164 [2020-09-25 05:43:26,426 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 05:43:26,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2020-09-25 05:43:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 05:43:26,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 90. [2020-09-25 05:43:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-25 05:43:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-09-25 05:43:26,456 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 48 [2020-09-25 05:43:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:26,458 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-09-25 05:43:26,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 05:43:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-09-25 05:43:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 05:43:26,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:26,463 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:26,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:43:26,464 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:26,465 INFO L82 PathProgramCache]: Analyzing trace with hash -523876270, now seen corresponding path program 2 times [2020-09-25 05:43:26,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:26,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80655557] [2020-09-25 05:43:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:26,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:26,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:26,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:27,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:28,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:31,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:31,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 05:43:31,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 05:43:31,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 05:43:31,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:31,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 05:43:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 05:43:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 05:43:31,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:31,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:31,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:31,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:31,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:43:31,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 05:43:31,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:31,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:31,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:31,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:31,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80655557] [2020-09-25 05:43:31,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:31,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 05:43:31,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059065523] [2020-09-25 05:43:31,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 05:43:31,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:31,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 05:43:31,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 05:43:31,576 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 8 states. [2020-09-25 05:43:31,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:31,954 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2020-09-25 05:43:31,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 05:43:31,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-09-25 05:43:31,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:31,959 INFO L225 Difference]: With dead ends: 166 [2020-09-25 05:43:31,959 INFO L226 Difference]: Without dead ends: 146 [2020-09-25 05:43:31,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-25 05:43:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-25 05:43:31,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-09-25 05:43:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 05:43:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-09-25 05:43:31,984 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 55 [2020-09-25 05:43:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:31,988 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-09-25 05:43:31,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 05:43:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-09-25 05:43:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 05:43:31,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:31,990 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:31,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 05:43:31,990 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:31,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2134174762, now seen corresponding path program 3 times [2020-09-25 05:43:31,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:31,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084756941] [2020-09-25 05:43:31,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:32,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:32,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:32,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:32,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:32,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:33,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:34,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:35,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:35,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:37,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:37,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 05:43:37,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:43:37,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 05:43:37,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:37,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:37,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 05:43:37,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 05:43:37,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 05:43:37,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 05:43:37,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:37,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:37,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:37,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:43:37,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:37,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 05:43:37,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:37,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:37,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:37,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:37,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084756941] [2020-09-25 05:43:37,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:37,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 05:43:37,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868752927] [2020-09-25 05:43:37,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 05:43:37,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:37,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 05:43:37,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 05:43:37,169 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 10 states. [2020-09-25 05:43:37,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:37,502 INFO L93 Difference]: Finished difference Result 165 states and 172 transitions. [2020-09-25 05:43:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 05:43:37,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-09-25 05:43:37,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:37,504 INFO L225 Difference]: With dead ends: 165 [2020-09-25 05:43:37,504 INFO L226 Difference]: Without dead ends: 135 [2020-09-25 05:43:37,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-25 05:43:37,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-25 05:43:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2020-09-25 05:43:37,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 05:43:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-09-25 05:43:37,518 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 58 [2020-09-25 05:43:37,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:37,519 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-09-25 05:43:37,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 05:43:37,519 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-09-25 05:43:37,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 05:43:37,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:37,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:37,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 05:43:37,521 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash -280271430, now seen corresponding path program 1 times [2020-09-25 05:43:37,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:37,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273597461] [2020-09-25 05:43:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:37,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:37,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:39,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:39,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 05:43:39,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:39,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1519 [2020-09-25 05:43:39,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:39,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:39,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 05:43:39,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 05:43:39,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 05:43:39,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:39,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:39,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:39,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:39,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:43:39,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:39,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 05:43:39,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:39,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:39,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:39,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:39,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 05:43:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:39,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:39,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:39,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 05:43:39,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:39,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 05:43:39,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:39,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:39,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:43:39,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:39,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 05:43:39,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 05:43:39,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273597461] [2020-09-25 05:43:39,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:39,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 05:43:39,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893711387] [2020-09-25 05:43:39,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 05:43:39,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:39,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 05:43:39,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 05:43:39,174 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 10 states. [2020-09-25 05:43:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:39,476 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-09-25 05:43:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 05:43:39,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-09-25 05:43:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:39,478 INFO L225 Difference]: With dead ends: 143 [2020-09-25 05:43:39,478 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 05:43:39,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-25 05:43:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 05:43:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-09-25 05:43:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 05:43:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-25 05:43:39,485 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 64 [2020-09-25 05:43:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:39,486 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-25 05:43:39,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 05:43:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-25 05:43:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 05:43:39,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:39,487 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:39,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 05:43:39,488 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:39,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1930216728, now seen corresponding path program 4 times [2020-09-25 05:43:39,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:39,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469845567] [2020-09-25 05:43:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:39,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:39,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:40,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:40,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:40,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:41,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:41,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:42,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:42,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:42,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:44,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:44,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 05:43:44,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 05:43:44,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 05:43:44,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:44,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:44,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 05:43:44,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 05:43:44,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 05:43:44,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:45,174 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-09-25 05:43:45,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:45,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:45,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:45,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:43:45,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:45,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 05:43:45,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:45,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:45,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:45,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:45,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:45,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:45,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469845567] [2020-09-25 05:43:45,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:45,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 05:43:45,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602928003] [2020-09-25 05:43:45,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 05:43:45,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:45,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 05:43:45,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-09-25 05:43:45,462 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 23 states. [2020-09-25 05:43:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:47,485 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2020-09-25 05:43:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 05:43:47,485 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-09-25 05:43:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:47,487 INFO L225 Difference]: With dead ends: 191 [2020-09-25 05:43:47,487 INFO L226 Difference]: Without dead ends: 189 [2020-09-25 05:43:47,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2020-09-25 05:43:47,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-25 05:43:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 117. [2020-09-25 05:43:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-25 05:43:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-09-25 05:43:47,497 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 65 [2020-09-25 05:43:47,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:47,498 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-09-25 05:43:47,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 05:43:47,498 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-09-25 05:43:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-25 05:43:47,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:47,499 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:47,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 05:43:47,500 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:47,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:47,500 INFO L82 PathProgramCache]: Analyzing trace with hash 499090838, now seen corresponding path program 5 times [2020-09-25 05:43:47,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:47,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968246337] [2020-09-25 05:43:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:47,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:47,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:48,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:48,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:49,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:50,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:51,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:52,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:52,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 05:43:52,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 05:43:52,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 05:43:52,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:52,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 05:43:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 05:43:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 05:43:52,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:43:52,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:52,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:52,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:52,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:43:52,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:52,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:43:52,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:52,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:52,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:43:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:52,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968246337] [2020-09-25 05:43:52,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:52,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 05:43:52,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652189264] [2020-09-25 05:43:52,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 05:43:52,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:52,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 05:43:52,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:43:52,640 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 11 states. [2020-09-25 05:43:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:53,133 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2020-09-25 05:43:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 05:43:53,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-09-25 05:43:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:53,139 INFO L225 Difference]: With dead ends: 193 [2020-09-25 05:43:53,139 INFO L226 Difference]: Without dead ends: 173 [2020-09-25 05:43:53,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-25 05:43:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-25 05:43:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 127. [2020-09-25 05:43:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 05:43:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-09-25 05:43:53,151 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 72 [2020-09-25 05:43:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:53,153 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-09-25 05:43:53,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 05:43:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-09-25 05:43:53,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 05:43:53,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:53,154 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:53,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 05:43:53,154 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:53,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:53,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1430946398, now seen corresponding path program 6 times [2020-09-25 05:43:53,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:53,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410317832] [2020-09-25 05:43:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:53,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:53,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:53,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:53,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:54,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:54,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:55,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:58,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:58,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 05:43:58,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 05:43:58,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 05:43:58,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:58,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:58,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 05:43:58,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 05:43:58,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 05:43:58,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:58,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:58,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:58,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:58,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:43:58,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:58,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 05:43:58,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:58,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:58,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:58,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:58,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:58,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:58,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410317832] [2020-09-25 05:43:58,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:58,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 05:43:58,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034174800] [2020-09-25 05:43:58,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 05:43:58,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 05:43:58,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-25 05:43:58,330 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 12 states. [2020-09-25 05:43:58,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:58,864 INFO L93 Difference]: Finished difference Result 192 states and 199 transitions. [2020-09-25 05:43:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 05:43:58,864 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-09-25 05:43:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:58,866 INFO L225 Difference]: With dead ends: 192 [2020-09-25 05:43:58,866 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 05:43:58,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-09-25 05:43:58,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 05:43:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 127. [2020-09-25 05:43:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 05:43:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-09-25 05:43:58,875 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 75 [2020-09-25 05:43:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:58,876 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-09-25 05:43:58,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 05:43:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-09-25 05:43:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-25 05:43:58,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:58,883 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:58,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 05:43:58,884 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:58,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:58,884 INFO L82 PathProgramCache]: Analyzing trace with hash 810536514, now seen corresponding path program 2 times [2020-09-25 05:43:58,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:58,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145947076] [2020-09-25 05:43:58,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 05:43:58,907 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 05:43:58,908 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 05:43:58,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 05:43:58,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 05:43:58 BoogieIcfgContainer [2020-09-25 05:43:58,938 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 05:43:58,941 INFO L168 Benchmark]: Toolchain (without parser) took 44614.67 ms. Allocated memory was 140.0 MB in the beginning and 422.6 MB in the end (delta: 282.6 MB). Free memory was 103.5 MB in the beginning and 301.5 MB in the end (delta: -198.0 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:58,942 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 05:43:58,943 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.53 ms. Allocated memory is still 140.0 MB. Free memory was 102.9 MB in the beginning and 92.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:58,944 INFO L168 Benchmark]: Boogie Preprocessor took 130.18 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 92.6 MB in the beginning and 180.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:58,944 INFO L168 Benchmark]: RCFGBuilder took 489.93 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 161.7 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:58,945 INFO L168 Benchmark]: TraceAbstraction took 43639.74 ms. Allocated memory was 203.4 MB in the beginning and 422.6 MB in the end (delta: 219.2 MB). Free memory was 161.1 MB in the beginning and 301.5 MB in the end (delta: -140.5 MB). Peak memory consumption was 78.7 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:58,949 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 344.53 ms. Allocated memory is still 140.0 MB. Free memory was 102.9 MB in the beginning and 92.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.18 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 92.6 MB in the beginning and 180.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 489.93 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 161.7 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 43639.74 ms. Allocated memory was 203.4 MB in the beginning and 422.6 MB in the end (delta: 219.2 MB). Free memory was 161.1 MB in the beginning and 301.5 MB in the end (delta: -140.5 MB). Peak memory consumption was 78.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int MAX = __VERIFIER_nondet_uint(); [L15] COND FALSE !(!(MAX > 0)) [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 [L20] COND TRUE i= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND TRUE i >= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND FALSE !(i >= 0) [L32] j = MAX-1 [L33] i=0 [L33] COND TRUE i