/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:50:13,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:50:13,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:50:13,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:50:13,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:50:13,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:50:13,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:50:13,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:50:13,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:50:13,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:50:13,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:50:13,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:50:13,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:50:13,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:50:13,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:50:13,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:50:13,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:50:13,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:50:13,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:50:13,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:50:13,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:50:13,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:50:13,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:50:13,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:50:13,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:50:13,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:50:13,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:50:13,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:50:13,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:50:13,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:50:13,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:50:13,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:50:13,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:50:13,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:50:13,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:50:13,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:50:13,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:50:13,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:50:13,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:50:13,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:50:13,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:50:13,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:50:13,174 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:50:13,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:50:13,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:50:13,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:50:13,176 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:50:13,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:50:13,177 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:50:13,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:50:13,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:50:13,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:50:13,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:50:13,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:50:13,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:50:13,178 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:50:13,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:50:13,180 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:50:13,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:50:13,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:50:13,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:50:13,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:50:13,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:50:13,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:50:13,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:50:13,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:50:13,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:50:13,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:50:13,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:50:13,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:50:13,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:50:13,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:50:13,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:50:13,767 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:50:13,778 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:50:13,780 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:50:13,781 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:50:13,782 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 21:50:13,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ea8595b6/c1ac81c5b5e845bbb5bca05b847207c5/FLAGe1c5eefb7 [2020-09-24 21:50:14,448 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:50:14,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 21:50:14,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ea8595b6/c1ac81c5b5e845bbb5bca05b847207c5/FLAGe1c5eefb7 [2020-09-24 21:50:14,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ea8595b6/c1ac81c5b5e845bbb5bca05b847207c5 [2020-09-24 21:50:14,734 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:50:14,740 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:50:14,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:14,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:50:14,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:50:14,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:14" (1/1) ... [2020-09-24 21:50:14,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@549c20e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:14, skipping insertion in model container [2020-09-24 21:50:14,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:14" (1/1) ... [2020-09-24 21:50:14,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:50:14,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:50:15,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:15,072 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:50:15,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:15,234 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:50:15,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:15 WrapperNode [2020-09-24 21:50:15,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:15,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:50:15,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:50:15,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:50:15,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:15" (1/1) ... [2020-09-24 21:50:15,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:15" (1/1) ... [2020-09-24 21:50:15,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:15" (1/1) ... [2020-09-24 21:50:15,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:15" (1/1) ... [2020-09-24 21:50:15,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:15" (1/1) ... [2020-09-24 21:50:15,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:15" (1/1) ... [2020-09-24 21:50:15,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:15" (1/1) ... [2020-09-24 21:50:15,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:50:15,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:50:15,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:50:15,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:50:15,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:50:15,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:50:15,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:50:15,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:50:15,369 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-09-24 21:50:15,369 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-09-24 21:50:15,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:50:15,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:50:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 21:50:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:50:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-09-24 21:50:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-09-24 21:50:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-09-24 21:50:15,371 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-09-24 21:50:15,371 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-09-24 21:50:15,371 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-09-24 21:50:15,371 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-09-24 21:50:15,371 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-09-24 21:50:15,372 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-24 21:50:15,372 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-09-24 21:50:15,372 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-09-24 21:50:15,372 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-09-24 21:50:15,372 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-09-24 21:50:15,373 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-24 21:50:15,373 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-09-24 21:50:15,373 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-09-24 21:50:15,373 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-09-24 21:50:15,373 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-09-24 21:50:15,373 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-09-24 21:50:15,374 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-09-24 21:50:15,374 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-09-24 21:50:15,374 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-09-24 21:50:15,374 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-09-24 21:50:15,374 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-09-24 21:50:15,374 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-09-24 21:50:15,375 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-09-24 21:50:15,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:50:15,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:50:15,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:50:15,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:50:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:50:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:50:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:50:15,910 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:50:15,910 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-24 21:50:15,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:15 BoogieIcfgContainer [2020-09-24 21:50:15,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:50:15,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:50:15,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:50:15,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:50:15,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:50:14" (1/3) ... [2020-09-24 21:50:15,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6383ec9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:15, skipping insertion in model container [2020-09-24 21:50:15,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:15" (2/3) ... [2020-09-24 21:50:15,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6383ec9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:15, skipping insertion in model container [2020-09-24 21:50:15,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:15" (3/3) ... [2020-09-24 21:50:15,928 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 21:50:15,941 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:50:15,952 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:50:15,975 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:50:16,007 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:50:16,007 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:50:16,007 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:50:16,007 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:50:16,008 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:50:16,008 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:50:16,008 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:50:16,008 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:50:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states. [2020-09-24 21:50:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 21:50:16,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:16,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:16,045 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:16,052 INFO L82 PathProgramCache]: Analyzing trace with hash 593727157, now seen corresponding path program 1 times [2020-09-24 21:50:16,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:16,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854722777] [2020-09-24 21:50:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:16,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:16,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:16,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:16,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:17,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:17,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:17,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:17,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:19,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:19,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 21:50:19,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:50:19,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2812 [2020-09-24 21:50:19,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:19,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:19,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:50:19,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:19,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:19,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:19,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:19,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:19,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:50:19,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:19,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:19,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:19,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:19,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:19,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 21:50:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:19,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:19,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:19,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:19,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:19,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:50:19,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:19,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:19,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:19,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:19,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:19,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854722777] [2020-09-24 21:50:19,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:19,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:50:19,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29292926] [2020-09-24 21:50:19,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:50:19,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:19,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:50:19,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:19,189 INFO L87 Difference]: Start difference. First operand 135 states. Second operand 3 states. [2020-09-24 21:50:19,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:19,485 INFO L93 Difference]: Finished difference Result 254 states and 290 transitions. [2020-09-24 21:50:19,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:50:19,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-09-24 21:50:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:19,500 INFO L225 Difference]: With dead ends: 254 [2020-09-24 21:50:19,500 INFO L226 Difference]: Without dead ends: 111 [2020-09-24 21:50:19,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-24 21:50:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-09-24 21:50:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-24 21:50:19,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-09-24 21:50:19,566 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 51 [2020-09-24 21:50:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:19,567 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-09-24 21:50:19,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:50:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-09-24 21:50:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 21:50:19,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:19,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:19,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:50:19,571 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:19,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:19,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1128985001, now seen corresponding path program 1 times [2020-09-24 21:50:19,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:19,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487127988] [2020-09-24 21:50:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:19,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:19,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:19,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:19,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:22,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:24,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 21:50:24,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:50:24,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:50:24,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:24,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:50:24,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:50:24,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 21:50:24,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:24,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:24,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:24,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:24,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:24,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:24,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:24,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:24,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:24,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:24,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:24,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 21:50:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:24,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:24,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:24,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:24,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:50:24,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:24,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:24,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:24,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:24,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:24,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487127988] [2020-09-24 21:50:24,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:24,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:50:24,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429446496] [2020-09-24 21:50:24,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:50:24,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:24,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:50:24,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:50:24,656 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 4 states. [2020-09-24 21:50:24,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:24,886 INFO L93 Difference]: Finished difference Result 212 states and 232 transitions. [2020-09-24 21:50:24,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 21:50:24,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-09-24 21:50:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:24,889 INFO L225 Difference]: With dead ends: 212 [2020-09-24 21:50:24,889 INFO L226 Difference]: Without dead ends: 117 [2020-09-24 21:50:24,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:50:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-24 21:50:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-09-24 21:50:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-24 21:50:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-09-24 21:50:24,903 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 63 [2020-09-24 21:50:24,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:24,903 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-09-24 21:50:24,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:50:24,903 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-09-24 21:50:24,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 21:50:24,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:24,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:24,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:50:24,906 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:24,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1210839627, now seen corresponding path program 1 times [2020-09-24 21:50:24,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:24,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314261617] [2020-09-24 21:50:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:24,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:25,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:26,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:26,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:26,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:27,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:27,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:28,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:29,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:29,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-24 21:50:29,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:50:29,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 21:50:29,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:29,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:29,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:50:29,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:50:29,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-24 21:50:30,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:30,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:30,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:30,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:30,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:50:30,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:30,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:30,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:30,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:30,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:50:30,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 21:50:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:30,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:30,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:30,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:30,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:50:30,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:30,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:30,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:30,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:30,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:30,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314261617] [2020-09-24 21:50:30,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:30,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:50:30,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820013309] [2020-09-24 21:50:30,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:50:30,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:30,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:50:30,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:50:30,076 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 6 states. [2020-09-24 21:50:30,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:30,350 INFO L93 Difference]: Finished difference Result 219 states and 239 transitions. [2020-09-24 21:50:30,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:50:30,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-09-24 21:50:30,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:30,353 INFO L225 Difference]: With dead ends: 219 [2020-09-24 21:50:30,353 INFO L226 Difference]: Without dead ends: 124 [2020-09-24 21:50:30,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-24 21:50:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2020-09-24 21:50:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-24 21:50:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2020-09-24 21:50:30,375 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 70 [2020-09-24 21:50:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:30,375 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2020-09-24 21:50:30,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:50:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2020-09-24 21:50:30,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-24 21:50:30,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:30,386 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:30,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:50:30,387 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:30,388 INFO L82 PathProgramCache]: Analyzing trace with hash -257337495, now seen corresponding path program 2 times [2020-09-24 21:50:30,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:30,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817308302] [2020-09-24 21:50:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:30,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:34,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:34,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:34,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:34,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:34,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:35,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:35,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 21:50:35,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:50:35,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:50:35,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:35,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:50:35,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:50:35,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:50:35,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:35,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:35,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:35,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:35,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:35,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:35,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:35,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:35,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 21:50:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:35,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:35,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:35,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:35,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:35,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:50:35,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:35,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:35,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:35,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:35,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:35,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817308302] [2020-09-24 21:50:35,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:35,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:50:35,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114091906] [2020-09-24 21:50:35,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:50:35,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:35,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:50:35,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:35,528 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand 8 states. [2020-09-24 21:50:35,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:35,835 INFO L93 Difference]: Finished difference Result 226 states and 246 transitions. [2020-09-24 21:50:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:50:35,836 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-09-24 21:50:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:35,838 INFO L225 Difference]: With dead ends: 226 [2020-09-24 21:50:35,838 INFO L226 Difference]: Without dead ends: 131 [2020-09-24 21:50:35,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:35,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-24 21:50:35,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-09-24 21:50:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-24 21:50:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2020-09-24 21:50:35,849 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 77 [2020-09-24 21:50:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:35,849 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2020-09-24 21:50:35,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:50:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2020-09-24 21:50:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 21:50:35,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:35,851 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:35,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:50:35,852 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:35,852 INFO L82 PathProgramCache]: Analyzing trace with hash 883135627, now seen corresponding path program 3 times [2020-09-24 21:50:35,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:35,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638544594] [2020-09-24 21:50:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:35,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:35,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:35,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:35,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:40,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:40,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:40,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:40,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:40,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:40,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:40,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-09-24 21:50:40,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:50:40,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 21:50:40,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:40,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:50:40,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:50:40,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:50:40,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:40,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:40,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:40,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:40,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:40,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:40,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:40,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:40,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:40,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:40,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:40,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:40,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 21:50:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:40,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:40,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:40,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:40,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:40,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:50:40,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:40,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:40,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638544594] [2020-09-24 21:50:40,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:40,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:50:40,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110878873] [2020-09-24 21:50:40,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:50:40,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:40,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:50:40,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:50:40,991 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand 10 states. [2020-09-24 21:50:41,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:41,338 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2020-09-24 21:50:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:50:41,339 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-09-24 21:50:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:41,340 INFO L225 Difference]: With dead ends: 233 [2020-09-24 21:50:41,341 INFO L226 Difference]: Without dead ends: 138 [2020-09-24 21:50:41,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:50:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-24 21:50:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2020-09-24 21:50:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-24 21:50:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2020-09-24 21:50:41,351 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 84 [2020-09-24 21:50:41,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:41,352 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2020-09-24 21:50:41,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:50:41,352 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2020-09-24 21:50:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-24 21:50:41,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:41,353 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:41,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:50:41,354 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash -687690455, now seen corresponding path program 4 times [2020-09-24 21:50:41,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:41,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148910062] [2020-09-24 21:50:41,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:41,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:41,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:41,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:41,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:46,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:46,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-24 21:50:46,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:50:46,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:50:46,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:50:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 21:50:46,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:46,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:46,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:46,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:46,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:46,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:46,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:46,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:46,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:46,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:46,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:46,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:46,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-24 21:50:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:46,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:46,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:46,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:46,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:50:46,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:46,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:46,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:46,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:46,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:46,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148910062] [2020-09-24 21:50:46,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:46,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:50:46,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700025135] [2020-09-24 21:50:46,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:50:46,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:46,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:50:46,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:46,552 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 12 states. [2020-09-24 21:50:46,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:46,930 INFO L93 Difference]: Finished difference Result 240 states and 260 transitions. [2020-09-24 21:50:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 21:50:46,932 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2020-09-24 21:50:46,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:46,934 INFO L225 Difference]: With dead ends: 240 [2020-09-24 21:50:46,935 INFO L226 Difference]: Without dead ends: 145 [2020-09-24 21:50:46,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:50:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-24 21:50:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-09-24 21:50:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-24 21:50:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2020-09-24 21:50:46,945 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 91 [2020-09-24 21:50:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:46,945 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2020-09-24 21:50:46,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:50:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2020-09-24 21:50:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-24 21:50:46,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:46,947 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:46,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:50:46,947 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash -722319669, now seen corresponding path program 5 times [2020-09-24 21:50:46,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:46,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704817904] [2020-09-24 21:50:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:46,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:47,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:47,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:47,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:51,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:51,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-09-24 21:50:51,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:50:51,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:50:51,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:51,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:50:51,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:50:51,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 21:50:51,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:52,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:52,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:52,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:52,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:52,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:52,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:50:52,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:52,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:52,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:52,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:52,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:52,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 21:50:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:52,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:52,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:52,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:52,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:52,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:50:52,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:52,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:52,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:52,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:52,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:50:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:52,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704817904] [2020-09-24 21:50:52,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:52,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 21:50:52,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109518921] [2020-09-24 21:50:52,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 21:50:52,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:52,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 21:50:52,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:50:52,170 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 14 states. [2020-09-24 21:50:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:52,663 INFO L93 Difference]: Finished difference Result 247 states and 267 transitions. [2020-09-24 21:50:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 21:50:52,663 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 98 [2020-09-24 21:50:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:52,665 INFO L225 Difference]: With dead ends: 247 [2020-09-24 21:50:52,665 INFO L226 Difference]: Without dead ends: 152 [2020-09-24 21:50:52,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 21:50:52,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-24 21:50:52,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-09-24 21:50:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-24 21:50:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2020-09-24 21:50:52,681 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 98 [2020-09-24 21:50:52,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:52,682 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2020-09-24 21:50:52,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 21:50:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2020-09-24 21:50:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-24 21:50:52,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:52,683 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:52,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:50:52,683 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:52,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:52,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1819472617, now seen corresponding path program 6 times [2020-09-24 21:50:52,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:52,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379794041] [2020-09-24 21:50:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:52,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:52,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:52,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:55,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:57,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:57,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-24 21:50:57,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:50:57,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:50:57,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:50:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:50:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 21:50:57,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:57,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:57,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:57,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:57,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:57,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:57,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:50:57,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:57,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:57,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:57,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:57,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:57,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 21:50:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:57,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:57,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:57,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:50:57,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:57,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:50:57,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:57,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:57,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:50:57,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:57,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:57,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379794041] [2020-09-24 21:50:57,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:57,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:50:57,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158943938] [2020-09-24 21:50:57,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:50:57,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:57,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:50:57,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:50:57,918 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand 16 states. [2020-09-24 21:50:58,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:58,442 INFO L93 Difference]: Finished difference Result 254 states and 274 transitions. [2020-09-24 21:50:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 21:50:58,443 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 105 [2020-09-24 21:50:58,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:58,445 INFO L225 Difference]: With dead ends: 254 [2020-09-24 21:50:58,446 INFO L226 Difference]: Without dead ends: 159 [2020-09-24 21:50:58,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:50:58,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-24 21:50:58,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2020-09-24 21:50:58,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-24 21:50:58,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2020-09-24 21:50:58,454 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 105 [2020-09-24 21:50:58,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:58,454 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2020-09-24 21:50:58,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:50:58,454 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2020-09-24 21:50:58,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-24 21:50:58,455 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:58,456 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:58,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:50:58,456 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:58,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:58,456 INFO L82 PathProgramCache]: Analyzing trace with hash -612628213, now seen corresponding path program 7 times [2020-09-24 21:50:58,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:58,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557758001] [2020-09-24 21:50:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:58,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:58,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:58,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:58,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking...