/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:31:21,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:31:21,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:31:21,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:31:21,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:31:21,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:31:21,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:31:21,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:31:21,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:31:21,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:31:21,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:31:21,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:31:21,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:31:21,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:31:21,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:31:21,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:31:21,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:31:21,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:31:21,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:31:21,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:31:21,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:31:21,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:31:21,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:31:21,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:31:21,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:31:21,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:31:21,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:31:21,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:31:21,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:31:21,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:31:21,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:31:21,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:31:21,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:31:21,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:31:21,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:31:21,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:31:21,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:31:21,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:31:21,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:31:21,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:31:21,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:31:21,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:31:21,259 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:31:21,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:31:21,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:31:21,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:31:21,263 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:31:21,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:31:21,263 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:31:21,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:31:21,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:31:21,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:31:21,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:31:21,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:31:21,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:31:21,266 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:31:21,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:31:21,266 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:31:21,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:31:21,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:31:21,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:31:21,267 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:31:21,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:31:21,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:31:21,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:31:21,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:31:21,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:31:21,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:31:21,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:31:21,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:31:21,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:31:21,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:31:21,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:31:21,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:31:21,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:31:21,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:31:21,814 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:31:21,815 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-21 11:31:21,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8516e96f8/1aa3c53b8df24714a8d01dbafab4ba04/FLAG82cbdd800 [2020-09-21 11:31:22,480 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:31:22,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-21 11:31:22,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8516e96f8/1aa3c53b8df24714a8d01dbafab4ba04/FLAG82cbdd800 [2020-09-21 11:31:22,805 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8516e96f8/1aa3c53b8df24714a8d01dbafab4ba04 [2020-09-21 11:31:22,818 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:31:22,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:31:22,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:22,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:31:22,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:31:22,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:22" (1/1) ... [2020-09-21 11:31:22,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d228d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:22, skipping insertion in model container [2020-09-21 11:31:22,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:22" (1/1) ... [2020-09-21 11:31:22,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:31:22,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:31:23,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:23,130 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:31:23,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:23,284 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:31:23,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:23 WrapperNode [2020-09-21 11:31:23,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:23,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:31:23,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:31:23,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:31:23,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:23" (1/1) ... [2020-09-21 11:31:23,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:23" (1/1) ... [2020-09-21 11:31:23,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:23" (1/1) ... [2020-09-21 11:31:23,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:23" (1/1) ... [2020-09-21 11:31:23,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:23" (1/1) ... [2020-09-21 11:31:23,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:23" (1/1) ... [2020-09-21 11:31:23,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:23" (1/1) ... [2020-09-21 11:31:23,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:31:23,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:31:23,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:31:23,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:31:23,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:31:23,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:31:23,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:31:23,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:31:23,438 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-09-21 11:31:23,438 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-09-21 11:31:23,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:31:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:31:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 11:31:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:31:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-09-21 11:31:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-09-21 11:31:23,441 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-09-21 11:31:23,441 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-09-21 11:31:23,441 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-09-21 11:31:23,441 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-09-21 11:31:23,442 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-09-21 11:31:23,443 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-09-21 11:31:23,443 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-21 11:31:23,443 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-09-21 11:31:23,443 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-09-21 11:31:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-09-21 11:31:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-09-21 11:31:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-21 11:31:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-09-21 11:31:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-09-21 11:31:23,445 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-09-21 11:31:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-09-21 11:31:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-09-21 11:31:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-09-21 11:31:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-09-21 11:31:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-09-21 11:31:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-09-21 11:31:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-09-21 11:31:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-09-21 11:31:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-09-21 11:31:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:31:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:31:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:31:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:31:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:31:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:31:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:31:23,924 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:31:23,924 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 11:31:23,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:23 BoogieIcfgContainer [2020-09-21 11:31:23,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:31:23,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:31:23,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:31:23,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:31:23,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:31:22" (1/3) ... [2020-09-21 11:31:23,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81ddf61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:23, skipping insertion in model container [2020-09-21 11:31:23,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:23" (2/3) ... [2020-09-21 11:31:23,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81ddf61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:23, skipping insertion in model container [2020-09-21 11:31:23,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:23" (3/3) ... [2020-09-21 11:31:23,939 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-21 11:31:23,951 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:31:23,960 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:31:23,981 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:31:24,006 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:31:24,007 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:31:24,007 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:31:24,007 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:31:24,007 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:31:24,007 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:31:24,007 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:31:24,008 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:31:24,031 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-09-21 11:31:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 11:31:24,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:24,041 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] [2020-09-21 11:31:24,042 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:24,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:24,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1663477819, now seen corresponding path program 1 times [2020-09-21 11:31:24,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:24,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31685000] [2020-09-21 11:31:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:24,237 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:24,237 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:24,238 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:24,238 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:24,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 11:31:24,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:24,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 11:31:24,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:24,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:24,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:24,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:31:24,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:24,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:24,346 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:24,346 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:24,347 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:24,347 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:24,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:24,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:24,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:24,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:24,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:24,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:24,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:24,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:24,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 11:31:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:24,364 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:24,364 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:24,364 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:24,364 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:24,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:24,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:24,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:24,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:24,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:24,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31685000] [2020-09-21 11:31:24,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:24,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:31:24,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623001525] [2020-09-21 11:31:24,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:31:24,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:24,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:31:24,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:24,414 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 4 states. [2020-09-21 11:31:24,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:24,618 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2020-09-21 11:31:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:31:24,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-09-21 11:31:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:24,632 INFO L225 Difference]: With dead ends: 104 [2020-09-21 11:31:24,633 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 11:31:24,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 11:31:24,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-09-21 11:31:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 11:31:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-09-21 11:31:24,691 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 32 [2020-09-21 11:31:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:24,692 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-09-21 11:31:24,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:31:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-09-21 11:31:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 11:31:24,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:24,695 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] [2020-09-21 11:31:24,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:31:24,695 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:24,696 INFO L82 PathProgramCache]: Analyzing trace with hash 227833136, now seen corresponding path program 1 times [2020-09-21 11:31:24,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:24,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240385692] [2020-09-21 11:31:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:24,731 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:24,731 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:24,732 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:24,732 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:24,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 11:31:24,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:24,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:31:24,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:24,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:31:24,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:24,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:31:24,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:24,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:24,790 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:24,790 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:24,790 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:24,791 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:24,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:24,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:24,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:24,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:24,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:24,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:24,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:24,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:24,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 11:31:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:24,803 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:24,803 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:24,803 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:24,804 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:24,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:24,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:24,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:24,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:24,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:24,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:24,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:24,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:24,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240385692] [2020-09-21 11:31:24,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:24,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:31:24,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342599466] [2020-09-21 11:31:24,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:24,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:24,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:24,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:24,837 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 5 states. [2020-09-21 11:31:25,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:25,018 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-09-21 11:31:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:25,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-09-21 11:31:25,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:25,020 INFO L225 Difference]: With dead ends: 90 [2020-09-21 11:31:25,021 INFO L226 Difference]: Without dead ends: 51 [2020-09-21 11:31:25,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-21 11:31:25,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-09-21 11:31:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-21 11:31:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-09-21 11:31:25,032 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 38 [2020-09-21 11:31:25,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:25,033 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-09-21 11:31:25,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-09-21 11:31:25,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 11:31:25,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:25,035 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:25,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:31:25,035 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:25,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:25,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1109616718, now seen corresponding path program 2 times [2020-09-21 11:31:25,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:25,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923121834] [2020-09-21 11:31:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,095 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,095 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,095 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,096 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-21 11:31:25,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 11:31:25,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:31:25,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:25,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,209 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,209 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,209 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,209 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:25,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:25,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:25,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:25,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:25,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:25,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 11:31:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,231 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,232 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,232 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,232 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:25,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:25,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:25,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:25,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:25,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-21 11:31:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:25,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923121834] [2020-09-21 11:31:25,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:25,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:31:25,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481939855] [2020-09-21 11:31:25,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:25,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:25,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:25,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:25,258 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2020-09-21 11:31:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:25,420 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-09-21 11:31:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:31:25,423 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-09-21 11:31:25,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:25,424 INFO L225 Difference]: With dead ends: 92 [2020-09-21 11:31:25,424 INFO L226 Difference]: Without dead ends: 53 [2020-09-21 11:31:25,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-21 11:31:25,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-09-21 11:31:25,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-21 11:31:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-09-21 11:31:25,435 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 40 [2020-09-21 11:31:25,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:25,435 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-09-21 11:31:25,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-09-21 11:31:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 11:31:25,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:25,437 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:31:25,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:31:25,438 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:25,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:25,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2091262388, now seen corresponding path program 3 times [2020-09-21 11:31:25,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:25,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934189244] [2020-09-21 11:31:25,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,510 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,510 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,510 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,510 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 11:31:25,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-21 11:31:25,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:31:25,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:25,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:31:25,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:25,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,611 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,612 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,612 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,612 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:25,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:25,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:25,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:25,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:25,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:25,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 11:31:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,621 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,621 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,621 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,622 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:25,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:25,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:25,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:25,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:25,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:25,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934189244] [2020-09-21 11:31:25,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:25,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:31:25,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131381289] [2020-09-21 11:31:25,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:25,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:25,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:25,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:25,631 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2020-09-21 11:31:25,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:25,758 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-09-21 11:31:25,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:31:25,758 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-21 11:31:25,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:25,760 INFO L225 Difference]: With dead ends: 94 [2020-09-21 11:31:25,760 INFO L226 Difference]: Without dead ends: 55 [2020-09-21 11:31:25,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-21 11:31:25,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-09-21 11:31:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-21 11:31:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-09-21 11:31:25,769 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 42 [2020-09-21 11:31:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:25,769 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-09-21 11:31:25,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-09-21 11:31:25,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 11:31:25,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:25,771 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:31:25,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:31:25,771 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:25,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1355467978, now seen corresponding path program 4 times [2020-09-21 11:31:25,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:25,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357330664] [2020-09-21 11:31:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,816 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,817 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,817 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,817 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 11:31:25,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:31:25,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:25,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:25,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:31:25,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:25,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,885 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,886 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,886 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,886 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:25,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:25,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:25,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:25,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:25,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:25,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 11:31:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:25,895 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:25,895 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:25,896 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:25,896 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:25,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:25,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:25,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:25,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:25,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:25,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357330664] [2020-09-21 11:31:25,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:25,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:31:25,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875403752] [2020-09-21 11:31:25,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:31:25,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:25,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:31:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:25,907 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 8 states. [2020-09-21 11:31:26,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:26,045 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-09-21 11:31:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:26,045 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-09-21 11:31:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:26,047 INFO L225 Difference]: With dead ends: 96 [2020-09-21 11:31:26,047 INFO L226 Difference]: Without dead ends: 57 [2020-09-21 11:31:26,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-21 11:31:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-09-21 11:31:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-21 11:31:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-09-21 11:31:26,055 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 44 [2020-09-21 11:31:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:26,055 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-09-21 11:31:26,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:31:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-09-21 11:31:26,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 11:31:26,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:26,057 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:31:26,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:31:26,058 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:26,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:26,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2051402808, now seen corresponding path program 5 times [2020-09-21 11:31:26,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:26,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211214853] [2020-09-21 11:31:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,105 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,105 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,105 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,106 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-21 11:31:26,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:31:26,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:31:26,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:26,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:31:26,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,189 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,189 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,189 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,189 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:26,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:26,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 11:31:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,197 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,197 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,198 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,198 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:26,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:26,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:26,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211214853] [2020-09-21 11:31:26,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:26,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:31:26,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369034037] [2020-09-21 11:31:26,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:31:26,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:26,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:31:26,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:26,208 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 9 states. [2020-09-21 11:31:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:26,352 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-09-21 11:31:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:31:26,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-09-21 11:31:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:26,354 INFO L225 Difference]: With dead ends: 98 [2020-09-21 11:31:26,354 INFO L226 Difference]: Without dead ends: 59 [2020-09-21 11:31:26,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-21 11:31:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-09-21 11:31:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-21 11:31:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-09-21 11:31:26,363 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 46 [2020-09-21 11:31:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:26,363 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-09-21 11:31:26,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:31:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-09-21 11:31:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 11:31:26,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:26,365 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:31:26,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:31:26,365 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:26,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1005818694, now seen corresponding path program 6 times [2020-09-21 11:31:26,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:26,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405278188] [2020-09-21 11:31:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,413 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,413 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,413 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,414 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-21 11:31:26,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:31:26,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:31:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:31:26,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,499 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,500 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,500 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,500 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:26,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:26,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 11:31:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,507 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,507 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,507 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,507 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:26,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:26,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:26,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405278188] [2020-09-21 11:31:26,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:26,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:31:26,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031358852] [2020-09-21 11:31:26,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:31:26,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:26,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:31:26,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:26,516 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 10 states. [2020-09-21 11:31:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:26,672 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-09-21 11:31:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:31:26,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-09-21 11:31:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:26,674 INFO L225 Difference]: With dead ends: 100 [2020-09-21 11:31:26,674 INFO L226 Difference]: Without dead ends: 61 [2020-09-21 11:31:26,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-21 11:31:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-09-21 11:31:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-21 11:31:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-09-21 11:31:26,682 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 48 [2020-09-21 11:31:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:26,683 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-09-21 11:31:26,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:31:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-09-21 11:31:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 11:31:26,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:26,684 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:31:26,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:31:26,685 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1238051652, now seen corresponding path program 7 times [2020-09-21 11:31:26,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:26,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816528750] [2020-09-21 11:31:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,735 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,736 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,736 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,736 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-21 11:31:26,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 11:31:26,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:31:26,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:26,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:31:26,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,832 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,833 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,833 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,833 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:26,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:26,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 11:31:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,840 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,840 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,840 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,840 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:26,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:26,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:26,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816528750] [2020-09-21 11:31:26,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:26,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:31:26,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128132524] [2020-09-21 11:31:26,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:31:26,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:26,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:31:26,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:26,863 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 11 states. [2020-09-21 11:31:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,057 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2020-09-21 11:31:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:31:27,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-09-21 11:31:27,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,059 INFO L225 Difference]: With dead ends: 101 [2020-09-21 11:31:27,059 INFO L226 Difference]: Without dead ends: 62 [2020-09-21 11:31:27,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:27,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-21 11:31:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-09-21 11:31:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-21 11:31:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-09-21 11:31:27,067 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 50 [2020-09-21 11:31:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,067 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-09-21 11:31:27,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:31:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-09-21 11:31:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-21 11:31:27,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,069 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:27,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:31:27,069 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1075624898, now seen corresponding path program 8 times [2020-09-21 11:31:27,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148152491] [2020-09-21 11:31:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,103 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,103 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,103 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,104 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-21 11:31:27,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:27,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:27,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-21 11:31:27,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:31:27,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,162 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,162 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,162 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,162 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:27,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 11:31:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,170 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,170 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,170 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,171 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:27,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-21 11:31:27,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148152491] [2020-09-21 11:31:27,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:27,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:31:27,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586809616] [2020-09-21 11:31:27,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:31:27,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:31:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:27,187 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2020-09-21 11:31:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,290 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-09-21 11:31:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:31:27,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-09-21 11:31:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,293 INFO L225 Difference]: With dead ends: 98 [2020-09-21 11:31:27,293 INFO L226 Difference]: Without dead ends: 63 [2020-09-21 11:31:27,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-21 11:31:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-09-21 11:31:27,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-21 11:31:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-09-21 11:31:27,306 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 52 [2020-09-21 11:31:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,307 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-09-21 11:31:27,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:31:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-09-21 11:31:27,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-21 11:31:27,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,308 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:27,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:31:27,309 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,309 INFO L82 PathProgramCache]: Analyzing trace with hash -856770180, now seen corresponding path program 1 times [2020-09-21 11:31:27,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681030304] [2020-09-21 11:31:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,353 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,353 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,354 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,354 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-21 11:31:27,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:31:27,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:31:27,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 11:31:27,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 11:31:27,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,411 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,412 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,412 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,412 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 11:31:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,419 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,420 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,420 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,420 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:27,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-21 11:31:27,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681030304] [2020-09-21 11:31:27,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:27,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:31:27,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597177846] [2020-09-21 11:31:27,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:27,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:27,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:27,429 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 6 states. [2020-09-21 11:31:27,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,631 INFO L93 Difference]: Finished difference Result 146 states and 184 transitions. [2020-09-21 11:31:27,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:31:27,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-09-21 11:31:27,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,635 INFO L225 Difference]: With dead ends: 146 [2020-09-21 11:31:27,636 INFO L226 Difference]: Without dead ends: 93 [2020-09-21 11:31:27,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:27,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-21 11:31:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-21 11:31:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-21 11:31:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-09-21 11:31:27,650 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 52 [2020-09-21 11:31:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,651 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-09-21 11:31:27,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-09-21 11:31:27,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-21 11:31:27,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,652 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:27,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:31:27,653 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1749253374, now seen corresponding path program 1 times [2020-09-21 11:31:27,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206805308] [2020-09-21 11:31:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,705 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,706 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,706 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,707 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-21 11:31:27,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:31:27,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:27,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 11:31:27,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 11:31:27,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,791 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,791 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,791 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,792 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:27,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 11:31:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,800 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,801 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,801 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,801 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:27,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-21 11:31:27,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206805308] [2020-09-21 11:31:27,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:27,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:31:27,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047809945] [2020-09-21 11:31:27,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:27,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:27,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:27,814 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 6 states. [2020-09-21 11:31:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:28,001 INFO L93 Difference]: Finished difference Result 157 states and 188 transitions. [2020-09-21 11:31:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:28,003 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-09-21 11:31:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:28,004 INFO L225 Difference]: With dead ends: 157 [2020-09-21 11:31:28,004 INFO L226 Difference]: Without dead ends: 90 [2020-09-21 11:31:28,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-21 11:31:28,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2020-09-21 11:31:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-21 11:31:28,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-09-21 11:31:28,016 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 52 [2020-09-21 11:31:28,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:28,017 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-09-21 11:31:28,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:28,017 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-09-21 11:31:28,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 11:31:28,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:28,026 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-09-21 11:31:28,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:31:28,026 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:28,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:28,027 INFO L82 PathProgramCache]: Analyzing trace with hash 694889275, now seen corresponding path program 1 times [2020-09-21 11:31:28,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:28,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390419325] [2020-09-21 11:31:28,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,078 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,079 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,079 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,079 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-21 11:31:28,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:31:28,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:31:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 11:31:28,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:31:28,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,148 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,149 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,149 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,149 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 11:31:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,155 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,156 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,156 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,156 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:28,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-21 11:31:28,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390419325] [2020-09-21 11:31:28,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:28,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 11:31:28,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995972804] [2020-09-21 11:31:28,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:28,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:28,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:28,168 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 7 states. [2020-09-21 11:31:28,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:28,477 INFO L93 Difference]: Finished difference Result 169 states and 214 transitions. [2020-09-21 11:31:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:31:28,478 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-09-21 11:31:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:28,480 INFO L225 Difference]: With dead ends: 169 [2020-09-21 11:31:28,480 INFO L226 Difference]: Without dead ends: 119 [2020-09-21 11:31:28,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-21 11:31:28,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-09-21 11:31:28,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-21 11:31:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2020-09-21 11:31:28,490 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 57 [2020-09-21 11:31:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:28,490 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2020-09-21 11:31:28,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:28,491 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2020-09-21 11:31:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 11:31:28,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:28,492 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-09-21 11:31:28,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:31:28,493 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:28,493 INFO L82 PathProgramCache]: Analyzing trace with hash -994054467, now seen corresponding path program 1 times [2020-09-21 11:31:28,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:28,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935802519] [2020-09-21 11:31:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,523 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,523 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,523 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,524 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-21 11:31:28,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:31:28,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:28,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-09-21 11:31:28,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:31:28,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,570 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,570 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,570 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,571 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 11:31:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,577 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,577 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,577 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,578 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:28,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-21 11:31:28,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935802519] [2020-09-21 11:31:28,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:28,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:31:28,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314500988] [2020-09-21 11:31:28,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:28,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:28,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:28,589 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand 6 states. [2020-09-21 11:31:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:28,745 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2020-09-21 11:31:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:31:28,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-09-21 11:31:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:28,747 INFO L225 Difference]: With dead ends: 166 [2020-09-21 11:31:28,747 INFO L226 Difference]: Without dead ends: 125 [2020-09-21 11:31:28,748 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 [2020-09-21 11:31:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-21 11:31:28,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2020-09-21 11:31:28,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-21 11:31:28,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2020-09-21 11:31:28,755 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 57 [2020-09-21 11:31:28,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:28,755 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2020-09-21 11:31:28,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2020-09-21 11:31:28,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 11:31:28,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:28,757 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-09-21 11:31:28,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:31:28,757 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:28,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1580860481, now seen corresponding path program 1 times [2020-09-21 11:31:28,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:28,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069452488] [2020-09-21 11:31:28,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,808 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,808 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,808 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,808 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-21 11:31:28,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:31:28,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:28,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-09-21 11:31:28,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 11:31:28,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:28,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,864 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,864 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,864 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,864 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 11:31:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,872 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,872 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,872 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,872 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:28,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:28,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:31:28,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-21 11:31:28,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069452488] [2020-09-21 11:31:28,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:28,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:31:28,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779143914] [2020-09-21 11:31:28,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:28,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:28,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:28,881 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand 6 states. [2020-09-21 11:31:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:29,029 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2020-09-21 11:31:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:31:29,031 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-09-21 11:31:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:29,032 INFO L225 Difference]: With dead ends: 101 [2020-09-21 11:31:29,032 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:31:29,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:31:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:31:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:31:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:31:29,035 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-09-21 11:31:29,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:29,035 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:31:29,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:31:29,036 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:31:29,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 11:31:29,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:31:29,145 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-09-21 11:31:29,145 INFO L268 CegarLoopResult]: For program point L60-2(line 60) no Hoare annotation was computed. [2020-09-21 11:31:29,145 INFO L268 CegarLoopResult]: For program point L60-4(lines 54 72) no Hoare annotation was computed. [2020-09-21 11:31:29,145 INFO L268 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-09-21 11:31:29,145 INFO L268 CegarLoopResult]: For program point L56-3(line 56) no Hoare annotation was computed. [2020-09-21 11:31:29,146 INFO L271 CegarLoopResult]: At program point L56-5(line 56) the Hoare annotation is: true [2020-09-21 11:31:29,146 INFO L268 CegarLoopResult]: For program point L52-1(lines 52 73) no Hoare annotation was computed. [2020-09-21 11:31:29,146 INFO L268 CegarLoopResult]: For program point L56-6(line 56) no Hoare annotation was computed. [2020-09-21 11:31:29,146 INFO L268 CegarLoopResult]: For program point L52-2(lines 52 73) no Hoare annotation was computed. [2020-09-21 11:31:29,146 INFO L271 CegarLoopResult]: At program point L52-4(lines 52 73) the Hoare annotation is: true [2020-09-21 11:31:29,146 INFO L268 CegarLoopResult]: For program point L52-5(lines 52 73) no Hoare annotation was computed. [2020-09-21 11:31:29,147 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-09-21 11:31:29,147 INFO L268 CegarLoopResult]: For program point L65-1(line 65) no Hoare annotation was computed. [2020-09-21 11:31:29,147 INFO L268 CegarLoopResult]: For program point L61(lines 61 70) no Hoare annotation was computed. [2020-09-21 11:31:29,147 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-09-21 11:31:29,147 INFO L268 CegarLoopResult]: For program point L57-2(line 57) no Hoare annotation was computed. [2020-09-21 11:31:29,147 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-09-21 11:31:29,147 INFO L268 CegarLoopResult]: For program point L66-1(line 66) no Hoare annotation was computed. [2020-09-21 11:31:29,148 INFO L268 CegarLoopResult]: For program point parse_expression_listFINAL(lines 47 75) no Hoare annotation was computed. [2020-09-21 11:31:29,148 INFO L268 CegarLoopResult]: For program point L62(lines 62 64) no Hoare annotation was computed. [2020-09-21 11:31:29,148 INFO L264 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-21 11:31:29,148 INFO L268 CegarLoopResult]: For program point L54(lines 54 72) no Hoare annotation was computed. [2020-09-21 11:31:29,148 INFO L268 CegarLoopResult]: For program point parse_expression_listEXIT(lines 47 75) no Hoare annotation was computed. [2020-09-21 11:31:29,148 INFO L268 CegarLoopResult]: For program point L59-1(line 59) no Hoare annotation was computed. [2020-09-21 11:31:29,148 INFO L268 CegarLoopResult]: For program point L59-2(line 59) no Hoare annotation was computed. [2020-09-21 11:31:29,148 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-09-21 11:31:29,148 INFO L268 CegarLoopResult]: For program point L59-4(line 59) no Hoare annotation was computed. [2020-09-21 11:31:29,149 INFO L268 CegarLoopResult]: For program point L59-6(line 59) no Hoare annotation was computed. [2020-09-21 11:31:29,149 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-09-21 11:31:29,149 INFO L271 CegarLoopResult]: At program point L59-8(line 59) the Hoare annotation is: true [2020-09-21 11:31:29,149 INFO L268 CegarLoopResult]: For program point L59-9(line 59) no Hoare annotation was computed. [2020-09-21 11:31:29,149 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:31:29,149 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 11:31:29,149 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:31:29,149 INFO L268 CegarLoopResult]: For program point r_strncpyFINAL(line 31) no Hoare annotation was computed. [2020-09-21 11:31:29,150 INFO L268 CegarLoopResult]: For program point r_strncpyEXIT(line 31) no Hoare annotation was computed. [2020-09-21 11:31:29,150 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-09-21 11:31:29,150 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:31:29,150 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:31:29,150 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:31:29,150 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:31:29,150 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-21 11:31:29,151 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 76 85) no Hoare annotation was computed. [2020-09-21 11:31:29,151 INFO L271 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: true [2020-09-21 11:31:29,151 INFO L268 CegarLoopResult]: For program point L83-1(line 83) no Hoare annotation was computed. [2020-09-21 11:31:29,151 INFO L268 CegarLoopResult]: For program point L79-2(lines 79 81) no Hoare annotation was computed. [2020-09-21 11:31:29,151 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 76 85) no Hoare annotation was computed. [2020-09-21 11:31:29,151 INFO L271 CegarLoopResult]: At program point L79-3(lines 79 81) the Hoare annotation is: true [2020-09-21 11:31:29,151 INFO L268 CegarLoopResult]: For program point L79-4(lines 79 81) no Hoare annotation was computed. [2020-09-21 11:31:29,151 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-21 11:31:29,152 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-21 11:31:29,152 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-21 11:31:29,152 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-21 11:31:29,152 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-21 11:31:29,152 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-21 11:31:29,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:31:29 BoogieIcfgContainer [2020-09-21 11:31:29,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:31:29,172 INFO L168 Benchmark]: Toolchain (without parser) took 6350.60 ms. Allocated memory was 148.4 MB in the beginning and 278.4 MB in the end (delta: 130.0 MB). Free memory was 104.1 MB in the beginning and 190.9 MB in the end (delta: -86.8 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:29,173 INFO L168 Benchmark]: CDTParser took 0.87 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:31:29,173 INFO L168 Benchmark]: CACSL2BoogieTranslator took 460.70 ms. Allocated memory was 148.4 MB in the beginning and 205.5 MB in the end (delta: 57.1 MB). Free memory was 103.5 MB in the beginning and 182.7 MB in the end (delta: -79.2 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:29,174 INFO L168 Benchmark]: Boogie Preprocessor took 56.35 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 180.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:29,175 INFO L168 Benchmark]: RCFGBuilder took 588.36 ms. Allocated memory is still 205.5 MB. Free memory was 180.1 MB in the beginning and 151.1 MB in the end (delta: 29.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:29,176 INFO L168 Benchmark]: TraceAbstraction took 5235.66 ms. Allocated memory was 205.5 MB in the beginning and 278.4 MB in the end (delta: 72.9 MB). Free memory was 151.1 MB in the beginning and 190.9 MB in the end (delta: -39.8 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:29,179 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.87 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 460.70 ms. Allocated memory was 148.4 MB in the beginning and 205.5 MB in the end (delta: 57.1 MB). Free memory was 103.5 MB in the beginning and 182.7 MB in the end (delta: -79.2 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.35 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 180.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 588.36 ms. Allocated memory is still 205.5 MB. Free memory was 180.1 MB in the beginning and 151.1 MB in the end (delta: 29.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5235.66 ms. Allocated memory was 205.5 MB in the beginning and 278.4 MB in the end (delta: 72.9 MB). Free memory was 151.1 MB in the beginning and 190.9 MB in the end (delta: -39.8 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 79]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.0s, OverallIterations: 14, TraceHistogramMax: 8, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 708 SDtfs, 416 SDslu, 1863 SDs, 0 SdLazy, 1510 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=13, 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, 14 MinimizatonAttempts, 101 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 88 PreInvPairs, 115 NumberOfFragments, 35 HoareAnnotationTreeSize, 88 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 40 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 667 NumberOfCodeBlocks, 667 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 653 ConstructedInterpolants, 0 QuantifiedInterpolants, 52658 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 390/530 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 correct! Received shutdown request...