/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:11:28,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:11:28,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:11:28,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:11:28,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:11:28,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:11:28,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:11:28,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:11:28,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:11:28,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:11:28,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:11:28,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:11:28,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:11:28,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:11:28,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:11:28,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:11:28,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:11:28,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:11:28,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:11:28,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:11:28,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:11:28,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:11:28,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:11:28,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:11:28,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:11:28,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:11:28,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:11:28,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:11:28,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:11:28,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:11:28,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:11:28,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:11:28,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:11:28,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:11:28,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:11:28,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:11:28,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:11:28,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:11:28,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:11:28,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:11:28,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:11:28,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 11:11:28,912 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:11:28,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:11:28,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:11:28,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:11:28,916 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:11:28,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:11:28,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:11:28,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:11:28,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:11:28,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:11:28,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:11:28,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:11:28,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:11:28,919 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:11:28,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:11:28,919 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:11:28,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:11:28,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:11:28,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:11:28,920 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:11:28,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:11:28,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:11:28,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:11:28,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:11:28,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:11:28,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:11:28,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:11:28,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:11:28,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:11:28,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 11:11:29,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:11:29,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:11:29,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:11:29,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:11:29,264 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:11:29,265 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-10-13 11:11:29,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0319303b/7c85706f8746419781936781705e4c96/FLAG718b0cd17 [2020-10-13 11:11:29,832 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:11:29,833 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-10-13 11:11:29,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0319303b/7c85706f8746419781936781705e4c96/FLAG718b0cd17 [2020-10-13 11:11:30,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0319303b/7c85706f8746419781936781705e4c96 [2020-10-13 11:11:30,183 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:11:30,185 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:11:30,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:11:30,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:11:30,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:11:30,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:11:30" (1/1) ... [2020-10-13 11:11:30,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51800d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:30, skipping insertion in model container [2020-10-13 11:11:30,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:11:30" (1/1) ... [2020-10-13 11:11:30,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:11:30,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:11:30,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:11:30,503 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:11:30,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:11:30,650 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:11:30,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:30 WrapperNode [2020-10-13 11:11:30,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:11:30,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:11:30,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:11:30,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:11:30,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:30" (1/1) ... [2020-10-13 11:11:30,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:30" (1/1) ... [2020-10-13 11:11:30,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:30" (1/1) ... [2020-10-13 11:11:30,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:30" (1/1) ... [2020-10-13 11:11:30,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:30" (1/1) ... [2020-10-13 11:11:30,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:30" (1/1) ... [2020-10-13 11:11:30,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:30" (1/1) ... [2020-10-13 11:11:30,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:11:30,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:11:30,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:11:30,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:11:30,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:11:30,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:11:30,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:11:30,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 11:11:30,817 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-10-13 11:11:30,818 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-10-13 11:11:30,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:11:30,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:11:30,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 11:11:30,820 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-10-13 11:11:30,820 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-10-13 11:11:30,820 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-10-13 11:11:30,820 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-10-13 11:11:30,820 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-10-13 11:11:30,821 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-10-13 11:11:30,821 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-10-13 11:11:30,822 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-10-13 11:11:30,822 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-10-13 11:11:30,822 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-10-13 11:11:30,822 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-10-13 11:11:30,822 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-10-13 11:11:30,823 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-10-13 11:11:30,823 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-10-13 11:11:30,824 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-10-13 11:11:30,824 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-10-13 11:11:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-10-13 11:11:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-10-13 11:11:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-10-13 11:11:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-10-13 11:11:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-10-13 11:11:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-10-13 11:11:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-10-13 11:11:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-10-13 11:11:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-10-13 11:11:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-10-13 11:11:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 11:11:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 11:11:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 11:11:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 11:11:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:11:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:11:30,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:11:31,267 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:11:31,267 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 11:11:31,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:11:31 BoogieIcfgContainer [2020-10-13 11:11:31,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:11:31,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:11:31,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:11:31,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:11:31,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:11:30" (1/3) ... [2020-10-13 11:11:31,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6c8171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:11:31, skipping insertion in model container [2020-10-13 11:11:31,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:30" (2/3) ... [2020-10-13 11:11:31,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6c8171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:11:31, skipping insertion in model container [2020-10-13 11:11:31,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:11:31" (3/3) ... [2020-10-13 11:11:31,281 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-10-13 11:11:31,292 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:11:31,300 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:11:31,315 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:11:31,337 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:11:31,338 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:11:31,338 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:11:31,338 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:11:31,338 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:11:31,338 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:11:31,339 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:11:31,339 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:11:31,355 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-10-13 11:11:31,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 11:11:31,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:31,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:31,363 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:31,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-10-13 11:11:31,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:31,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726923832] [2020-10-13 11:11:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:31,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:31,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:31,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:31,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:31,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:33,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:34,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:34,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 11:11:34,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 11:11:34,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2775 [2020-10-13 11:11:34,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:34,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:34,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 11:11:34,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:34,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 11:11:34,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:34,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:34,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:34,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:34,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:34,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:11:34,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:34,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:34,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:34,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 11:11:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:34,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:34,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:34,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:34,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:34,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:11:34,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:34,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:34,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:11:34,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:34,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:34,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726923832] [2020-10-13 11:11:34,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:34,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:11:34,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952966950] [2020-10-13 11:11:34,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:11:34,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:34,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:11:34,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:11:34,409 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-10-13 11:11:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:34,585 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-10-13 11:11:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:11:34,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-13 11:11:34,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:34,596 INFO L225 Difference]: With dead ends: 93 [2020-10-13 11:11:34,597 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 11:11:34,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:11:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 11:11:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 11:11:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 11:11:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-13 11:11:34,646 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-10-13 11:11:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:34,646 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-13 11:11:34,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:11:34,647 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-13 11:11:34,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 11:11:34,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:34,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:34,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:11:34,649 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:34,650 INFO L82 PathProgramCache]: Analyzing trace with hash -171780126, now seen corresponding path program 1 times [2020-10-13 11:11:34,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:34,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649332582] [2020-10-13 11:11:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:34,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:34,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:34,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:34,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:34,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:34,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:34,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:35,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:35,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:35,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:39,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:39,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 11:11:39,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 11:11:39,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:11:39,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:39,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:11:39,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 11:11:39,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:11:39,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:39,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:39,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:39,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:39,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:39,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:39,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:39,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:39,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:39,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:39,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:39,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:39,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 11:11:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:39,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:39,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:39,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:39,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:39,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:39,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:39,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:11:39,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:39,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:39,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649332582] [2020-10-13 11:11:39,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:39,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 11:11:39,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401999721] [2020-10-13 11:11:39,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:11:39,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:39,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:11:39,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:11:39,731 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-10-13 11:11:39,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:39,839 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-10-13 11:11:39,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 11:11:39,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-13 11:11:39,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:39,841 INFO L225 Difference]: With dead ends: 78 [2020-10-13 11:11:39,841 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 11:11:39,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:11:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 11:11:39,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 11:11:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 11:11:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-10-13 11:11:39,851 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2020-10-13 11:11:39,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:39,852 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-10-13 11:11:39,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:11:39,852 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-10-13 11:11:39,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 11:11:39,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:39,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:39,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:11:39,854 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:39,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:39,854 INFO L82 PathProgramCache]: Analyzing trace with hash 250921700, now seen corresponding path program 1 times [2020-10-13 11:11:39,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:39,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936583521] [2020-10-13 11:11:39,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:39,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:39,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:39,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:39,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:39,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:40,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:40,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:41,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:41,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:41,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:42,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:42,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 11:11:42,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 11:11:42,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3125 [2020-10-13 11:11:42,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:42,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:11:42,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 11:11:42,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:11:42,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:43,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:43,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:43,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:43,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:43,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:43,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:43,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:43,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:43,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:43,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:43,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:43,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 11:11:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:43,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:43,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:43,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:43,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:43,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:43,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:43,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:43,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:11:43,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:43,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:43,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936583521] [2020-10-13 11:11:43,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:43,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 11:11:43,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982647030] [2020-10-13 11:11:43,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:11:43,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:43,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:11:43,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:11:43,063 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-10-13 11:11:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:43,245 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2020-10-13 11:11:43,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:11:43,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-13 11:11:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:43,249 INFO L225 Difference]: With dead ends: 106 [2020-10-13 11:11:43,250 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 11:11:43,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:11:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 11:11:43,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2020-10-13 11:11:43,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 11:11:43,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-10-13 11:11:43,264 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 33 [2020-10-13 11:11:43,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:43,265 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-10-13 11:11:43,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:11:43,267 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-10-13 11:11:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 11:11:43,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:43,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:43,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 11:11:43,269 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:43,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1210151716, now seen corresponding path program 1 times [2020-10-13 11:11:43,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:43,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011562940] [2020-10-13 11:11:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:43,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:43,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:43,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:43,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:43,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:43,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:44,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:44,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:44,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:44,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:44,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:45,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:45,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 11:11:45,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 11:11:45,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2248 [2020-10-13 11:11:45,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:11:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:11:45,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:11:45,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:45,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:45,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:45,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:45,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:45,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:45,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:45,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:45,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:45,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 11:11:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:45,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:45,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:45,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:45,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:45,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:45,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:45,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:11:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:45,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:45,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011562940] [2020-10-13 11:11:45,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:45,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 11:11:45,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64349490] [2020-10-13 11:11:45,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:11:45,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:45,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:11:45,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:11:45,616 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 7 states. [2020-10-13 11:11:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:45,823 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2020-10-13 11:11:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:11:45,824 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-13 11:11:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:45,826 INFO L225 Difference]: With dead ends: 129 [2020-10-13 11:11:45,826 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 11:11:45,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:11:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 11:11:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2020-10-13 11:11:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 11:11:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2020-10-13 11:11:45,837 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 33 [2020-10-13 11:11:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:45,837 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2020-10-13 11:11:45,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:11:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2020-10-13 11:11:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 11:11:45,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:45,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:45,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 11:11:45,839 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:45,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:45,840 INFO L82 PathProgramCache]: Analyzing trace with hash -783992990, now seen corresponding path program 1 times [2020-10-13 11:11:45,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:45,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512118247] [2020-10-13 11:11:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:45,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:45,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:45,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:45,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:45,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:46,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:46,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:46,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 11:11:46,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 11:11:46,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 891 [2020-10-13 11:11:46,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:46,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:11:46,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:11:46,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:11:46,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:46,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:46,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:46,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:46,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:46,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:46,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:46,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:46,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:46,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:46,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:46,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:46,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 11:11:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:46,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:46,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:46,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:46,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:46,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:46,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:46,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:46,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:11:46,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:46,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:46,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512118247] [2020-10-13 11:11:46,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:46,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 11:11:46,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196352461] [2020-10-13 11:11:46,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:11:46,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:46,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:11:46,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:11:46,814 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 6 states. [2020-10-13 11:11:47,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:47,164 INFO L93 Difference]: Finished difference Result 194 states and 253 transitions. [2020-10-13 11:11:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:11:47,165 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-13 11:11:47,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:47,166 INFO L225 Difference]: With dead ends: 194 [2020-10-13 11:11:47,166 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 11:11:47,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:11:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 11:11:47,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2020-10-13 11:11:47,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 11:11:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2020-10-13 11:11:47,175 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 33 [2020-10-13 11:11:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:47,175 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2020-10-13 11:11:47,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:11:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2020-10-13 11:11:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 11:11:47,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:47,177 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:47,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 11:11:47,178 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:47,178 INFO L82 PathProgramCache]: Analyzing trace with hash -731835505, now seen corresponding path program 1 times [2020-10-13 11:11:47,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:47,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485300431] [2020-10-13 11:11:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:47,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:47,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:47,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:47,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:47,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:47,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:47,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:47,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:47,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:47,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:49,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:49,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 11:11:49,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 11:11:49,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1992 [2020-10-13 11:11:49,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:11:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:11:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:11:49,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:49,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:49,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:49,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:49,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:49,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:49,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:49,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:49,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:49,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:49,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:49,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:49,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:11:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:49,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:49,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:49,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:49,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:49,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:49,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:11:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:49,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:11:49,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485300431] [2020-10-13 11:11:49,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:49,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 11:11:49,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886478201] [2020-10-13 11:11:49,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:11:49,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:49,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:11:49,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:11:49,252 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 7 states. [2020-10-13 11:11:49,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:49,516 INFO L93 Difference]: Finished difference Result 171 states and 222 transitions. [2020-10-13 11:11:49,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:11:49,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-13 11:11:49,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:49,518 INFO L225 Difference]: With dead ends: 171 [2020-10-13 11:11:49,518 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 11:11:49,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:11:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 11:11:49,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2020-10-13 11:11:49,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 11:11:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2020-10-13 11:11:49,528 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 38 [2020-10-13 11:11:49,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:49,529 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2020-10-13 11:11:49,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:11:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2020-10-13 11:11:49,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 11:11:49,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:49,530 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:49,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 11:11:49,531 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:49,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1568987085, now seen corresponding path program 1 times [2020-10-13 11:11:49,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:49,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124137071] [2020-10-13 11:11:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:49,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:49,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:49,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:49,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:49,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:50,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:50,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 11:11:50,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 11:11:50,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 707 [2020-10-13 11:11:50,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:50,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:11:50,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:11:50,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 11:11:50,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:50,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:50,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:50,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:50,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:50,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:50,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:50,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:50,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:50,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:50,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:50,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:50,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:11:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:50,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:50,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:50,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:50,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:50,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:50,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:50,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:11:50,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:50,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:11:50,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:11:50,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124137071] [2020-10-13 11:11:50,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:50,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 11:11:50,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159841432] [2020-10-13 11:11:50,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:11:50,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:50,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:11:50,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:11:50,333 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand 8 states. [2020-10-13 11:11:50,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:50,684 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2020-10-13 11:11:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:11:50,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-13 11:11:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:50,686 INFO L225 Difference]: With dead ends: 118 [2020-10-13 11:11:50,687 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 11:11:50,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:11:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 11:11:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-10-13 11:11:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 11:11:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 136 transitions. [2020-10-13 11:11:50,697 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 136 transitions. Word has length 38 [2020-10-13 11:11:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:50,697 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 136 transitions. [2020-10-13 11:11:50,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:11:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 136 transitions. [2020-10-13 11:11:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:11:50,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:50,700 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:50,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 11:11:50,700 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:50,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1909797290, now seen corresponding path program 1 times [2020-10-13 11:11:50,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:50,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868464883] [2020-10-13 11:11:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:50,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:50,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:50,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:50,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:51,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:51,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:51,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:53,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:55,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 11:11:55,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 11:11:55,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 11:11:55,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:11:55,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 11:11:55,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 11:11:55,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:55,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:55,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:55,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:55,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:55,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:55,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:55,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:55,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:55,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:55,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:55,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:11:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:55,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:55,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:55,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:55,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 11:11:55,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:55,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:55,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:11:55,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:55,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:11:55,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868464883] [2020-10-13 11:11:55,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:55,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 11:11:55,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016869052] [2020-10-13 11:11:55,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:11:55,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:55,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:11:55,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:11:55,787 INFO L87 Difference]: Start difference. First operand 107 states and 136 transitions. Second operand 5 states. [2020-10-13 11:11:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:55,919 INFO L93 Difference]: Finished difference Result 180 states and 228 transitions. [2020-10-13 11:11:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:11:55,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-10-13 11:11:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:55,923 INFO L225 Difference]: With dead ends: 180 [2020-10-13 11:11:55,923 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 11:11:55,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:11:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 11:11:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-13 11:11:55,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 11:11:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2020-10-13 11:11:55,944 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 40 [2020-10-13 11:11:55,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:55,945 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2020-10-13 11:11:55,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:11:55,945 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2020-10-13 11:11:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:11:55,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:55,948 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:55,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 11:11:55,948 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:55,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:55,949 INFO L82 PathProgramCache]: Analyzing trace with hash 888728936, now seen corresponding path program 1 times [2020-10-13 11:11:55,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:55,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891112668] [2020-10-13 11:11:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:55,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:56,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:56,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:56,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:56,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 11:11:56,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:11:56,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 949 [2020-10-13 11:11:56,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:56,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:11:56,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:11:56,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:11:56,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:56,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:56,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:56,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:56,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:56,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:56,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:56,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:56,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:56,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:11:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:56,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:56,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:56,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:56,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:56,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:56,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:11:56,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:56,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 11:11:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:56,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891112668] [2020-10-13 11:11:56,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:11:56,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:11:56,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618198857] [2020-10-13 11:11:56,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:11:56,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:56,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:11:56,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:11:56,988 INFO L87 Difference]: Start difference. First operand 117 states and 146 transitions. Second operand 8 states. [2020-10-13 11:11:57,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:57,213 INFO L93 Difference]: Finished difference Result 246 states and 308 transitions. [2020-10-13 11:11:57,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:11:57,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-13 11:11:57,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:57,215 INFO L225 Difference]: With dead ends: 246 [2020-10-13 11:11:57,215 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 11:11:57,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:11:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 11:11:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 118. [2020-10-13 11:11:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 11:11:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2020-10-13 11:11:57,224 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 40 [2020-10-13 11:11:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:57,224 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2020-10-13 11:11:57,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:11:57,225 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2020-10-13 11:11:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 11:11:57,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:57,230 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:57,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 11:11:57,230 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:57,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 2 times [2020-10-13 11:11:57,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:57,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199267930] [2020-10-13 11:11:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:57,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:57,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:57,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:57,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 11:11:57,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:11:57,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-13 11:11:57,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:57,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:11:57,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:11:57,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 11:11:57,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:57,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:57,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:57,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:57,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:57,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:57,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:57,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:57,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:57,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:57,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 11:11:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:57,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:57,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:57,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:57,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:57,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:57,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:57,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:57,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:11:57,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:57,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:57,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199267930] [2020-10-13 11:11:57,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:11:57,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:11:57,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343832296] [2020-10-13 11:11:57,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:11:57,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:57,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:11:57,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:11:57,627 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand 9 states. [2020-10-13 11:11:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:58,094 INFO L93 Difference]: Finished difference Result 389 states and 494 transitions. [2020-10-13 11:11:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 11:11:58,095 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-13 11:11:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:58,098 INFO L225 Difference]: With dead ends: 389 [2020-10-13 11:11:58,098 INFO L226 Difference]: Without dead ends: 237 [2020-10-13 11:11:58,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:11:58,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-13 11:11:58,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 171. [2020-10-13 11:11:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-13 11:11:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 206 transitions. [2020-10-13 11:11:58,121 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 206 transitions. Word has length 45 [2020-10-13 11:11:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:58,122 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 206 transitions. [2020-10-13 11:11:58,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:11:58,122 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 206 transitions. [2020-10-13 11:11:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 11:11:58,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:58,124 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:58,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 11:11:58,124 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:58,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2066975713, now seen corresponding path program 1 times [2020-10-13 11:11:58,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:58,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565269126] [2020-10-13 11:11:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:58,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:58,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:58,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 11:11:58,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:58,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-13 11:11:58,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:58,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:11:58,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:11:58,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 11:11:58,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:58,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:58,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:58,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:58,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:58,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:58,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:58,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:58,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:58,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:58,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:58,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:58,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 11:11:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:58,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:58,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:58,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:58,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:58,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:58,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:11:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:11:58,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:58,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565269126] [2020-10-13 11:11:58,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:11:58,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:11:58,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794066901] [2020-10-13 11:11:58,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:11:58,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:58,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:11:58,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:11:58,364 INFO L87 Difference]: Start difference. First operand 171 states and 206 transitions. Second operand 10 states. [2020-10-13 11:11:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:58,699 INFO L93 Difference]: Finished difference Result 246 states and 296 transitions. [2020-10-13 11:11:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:11:58,699 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-13 11:11:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:58,702 INFO L225 Difference]: With dead ends: 246 [2020-10-13 11:11:58,702 INFO L226 Difference]: Without dead ends: 244 [2020-10-13 11:11:58,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:11:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-13 11:11:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2020-10-13 11:11:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-13 11:11:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 206 transitions. [2020-10-13 11:11:58,716 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 206 transitions. Word has length 45 [2020-10-13 11:11:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:58,716 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 206 transitions. [2020-10-13 11:11:58,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:11:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 206 transitions. [2020-10-13 11:11:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 11:11:58,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:58,717 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:58,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 11:11:58,718 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:58,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:58,718 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-10-13 11:11:58,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:58,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423514035] [2020-10-13 11:11:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:58,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:58,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:58,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 11:11:58,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:58,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-13 11:11:58,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:58,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:11:58,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:11:58,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 11:11:58,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:58,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:58,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:58,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:58,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:58,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:58,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:58,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:58,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:58,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 11:11:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:58,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:58,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:58,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:58,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:58,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:58,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:58,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:11:58,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:58,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:11:58,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:58,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423514035] [2020-10-13 11:11:58,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:11:58,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:11:58,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963325016] [2020-10-13 11:11:58,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:11:58,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:58,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:11:58,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:11:58,966 INFO L87 Difference]: Start difference. First operand 171 states and 206 transitions. Second operand 11 states. [2020-10-13 11:11:59,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:59,414 INFO L93 Difference]: Finished difference Result 275 states and 336 transitions. [2020-10-13 11:11:59,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 11:11:59,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-13 11:11:59,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:59,421 INFO L225 Difference]: With dead ends: 275 [2020-10-13 11:11:59,421 INFO L226 Difference]: Without dead ends: 273 [2020-10-13 11:11:59,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:11:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-13 11:11:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 198. [2020-10-13 11:11:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-13 11:11:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 247 transitions. [2020-10-13 11:11:59,439 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 247 transitions. Word has length 45 [2020-10-13 11:11:59,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:59,439 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 247 transitions. [2020-10-13 11:11:59,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:11:59,439 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 247 transitions. [2020-10-13 11:11:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 11:11:59,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:59,440 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:59,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 11:11:59,441 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:59,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-10-13 11:11:59,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:59,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981934352] [2020-10-13 11:11:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 11:11:59,453 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 11:11:59,454 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 11:11:59,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 11:11:59,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 11:11:59 BoogieIcfgContainer [2020-10-13 11:11:59,479 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 11:11:59,482 INFO L168 Benchmark]: Toolchain (without parser) took 29296.35 ms. Allocated memory was 138.9 MB in the beginning and 570.9 MB in the end (delta: 432.0 MB). Free memory was 101.7 MB in the beginning and 261.0 MB in the end (delta: -159.3 MB). Peak memory consumption was 272.7 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:59,483 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 11:11:59,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 466.17 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.3 MB in the beginning and 179.0 MB in the end (delta: -77.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:59,484 INFO L168 Benchmark]: Boogie Preprocessor took 90.00 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 176.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:59,485 INFO L168 Benchmark]: RCFGBuilder took 529.03 ms. Allocated memory is still 201.9 MB. Free memory was 176.2 MB in the beginning and 148.4 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:59,486 INFO L168 Benchmark]: TraceAbstraction took 28205.75 ms. Allocated memory was 201.9 MB in the beginning and 570.9 MB in the end (delta: 369.1 MB). Free memory was 147.8 MB in the beginning and 261.0 MB in the end (delta: -113.3 MB). Peak memory consumption was 255.8 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:59,489 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 466.17 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.3 MB in the beginning and 179.0 MB in the end (delta: -77.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 90.00 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 176.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 529.03 ms. Allocated memory is still 201.9 MB. Free memory was 176.2 MB in the beginning and 148.4 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28205.75 ms. Allocated memory was 201.9 MB in the beginning and 570.9 MB in the end (delta: 369.1 MB). Free memory was 147.8 MB in the beginning and 261.0 MB in the end (delta: -113.3 MB). Peak memory consumption was 255.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 [L76] CALL parse_expression_list (A) [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; [L50] COND FALSE !(!str) [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j [L61] CALL r_strncpy(str2, str+start, j-start+1) [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) [L62] CALL __VERIFIER_assert(j - start + 1 < 2) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.1s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 546 SDtfs, 1005 SDslu, 1287 SDs, 0 SdLazy, 1904 SolverSat, 277 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=198occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 350 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 24.1s InterpolantComputationTime, 497 NumberOfCodeBlocks, 497 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 440 ConstructedInterpolants, 0 QuantifiedInterpolants, 42443 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 6/35 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...