/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-queue-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:10:03,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:10:03,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:10:03,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:10:03,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:10:03,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:10:03,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:10:03,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:10:03,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:10:03,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:10:03,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:10:03,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:10:03,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:10:03,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:10:03,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:10:03,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:10:03,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:10:03,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:10:03,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:10:03,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:10:03,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:10:03,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:10:03,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:10:03,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:10:03,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:10:03,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:10:03,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:10:03,736 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:10:03,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:10:03,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:10:03,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:10:03,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:10:03,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:10:03,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:10:03,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:10:03,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:10:03,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:10:03,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:10:03,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:10:03,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:10:03,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:10:03,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:10:03,806 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:10:03,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:10:03,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:10:03,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:10:03,811 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:10:03,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:10:03,812 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:10:03,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:10:03,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:10:03,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:10:03,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:10:03,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:10:03,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:10:03,814 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:10:03,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:10:03,814 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:10:03,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:10:03,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:10:03,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:10:03,815 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:10:03,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:10:03,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:10:03,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:10:03,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:10:03,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:10:03,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:10:03,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:10:03,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:10:03,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:10:03,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:10:04,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:10:04,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:10:04,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:10:04,272 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:10:04,273 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:10:04,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-queue-2.i [2020-10-29 09:10:04,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b69baa075/f1cdcfc1656b4e288c579e97e12e3d34/FLAGd78734494 [2020-10-29 09:10:05,100 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:10:05,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-queue-2.i [2020-10-29 09:10:05,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b69baa075/f1cdcfc1656b4e288c579e97e12e3d34/FLAGd78734494 [2020-10-29 09:10:05,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b69baa075/f1cdcfc1656b4e288c579e97e12e3d34 [2020-10-29 09:10:05,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:10:05,389 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:10:05,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:05,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:10:05,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:10:05,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:05" (1/1) ... [2020-10-29 09:10:05,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@223958d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:05, skipping insertion in model container [2020-10-29 09:10:05,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:05" (1/1) ... [2020-10-29 09:10:05,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:10:05,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:10:05,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:05,901 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:10:05,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:06,048 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:10:06,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:06 WrapperNode [2020-10-29 09:10:06,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:06,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:10:06,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:10:06,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:10:06,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:06" (1/1) ... [2020-10-29 09:10:06,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:06" (1/1) ... [2020-10-29 09:10:06,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:06" (1/1) ... [2020-10-29 09:10:06,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:06" (1/1) ... [2020-10-29 09:10:06,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:06" (1/1) ... [2020-10-29 09:10:06,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:06" (1/1) ... [2020-10-29 09:10:06,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:06" (1/1) ... [2020-10-29 09:10:06,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:10:06,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:10:06,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:10:06,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:10:06,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:10:06,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:10:06,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:10:06,208 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:10:06,208 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:10:06,208 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:10:06,208 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:10:06,208 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:10:06,209 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:10:06,209 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:10:06,209 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:10:06,209 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:10:06,209 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:10:06,209 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:10:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:10:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:10:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:10:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:10:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:10:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:10:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:10:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:10:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:10:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:10:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:10:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:10:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:10:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:10:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:10:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:10:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:10:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:10:06,213 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:10:06,213 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:10:06,213 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:10:06,213 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:10:06,213 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:10:06,213 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:10:06,214 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:10:06,214 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:10:06,214 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:10:06,214 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:10:06,214 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:10:06,214 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:10:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:10:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:10:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:10:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:10:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:10:06,216 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:10:06,216 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:10:06,216 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:10:06,216 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:10:06,216 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:10:06,216 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:10:06,217 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:10:06,217 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:10:06,217 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:10:06,217 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:10:06,217 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:10:06,218 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:10:06,218 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:10:06,218 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:10:06,218 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:10:06,218 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:10:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:10:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:10:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:10:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:10:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:10:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:10:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:10:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:10:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:10:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:10:06,221 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:10:06,221 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:10:06,221 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:10:06,221 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:10:06,221 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:10:06,221 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:10:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:10:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:10:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:10:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:10:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:10:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:10:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:10:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:10:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:10:06,223 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:10:06,224 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:10:06,224 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:10:06,224 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:10:06,224 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:10:06,224 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:10:06,225 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:10:06,225 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:10:06,225 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:10:06,225 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:10:06,225 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:10:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:10:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:10:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:10:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:10:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:10:06,227 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:10:06,227 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:10:06,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:10:06,227 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:10:06,227 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:10:06,228 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:10:06,228 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:10:06,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:10:06,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:10:06,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:10:06,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:10:06,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:10:06,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:10:06,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:10:06,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:10:06,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:10:06,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:10:06,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:10:07,013 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:10:07,013 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-10-29 09:10:07,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:07 BoogieIcfgContainer [2020-10-29 09:10:07,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:10:07,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:10:07,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:10:07,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:10:07,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:10:05" (1/3) ... [2020-10-29 09:10:07,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ec0653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:07, skipping insertion in model container [2020-10-29 09:10:07,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:06" (2/3) ... [2020-10-29 09:10:07,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ec0653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:07, skipping insertion in model container [2020-10-29 09:10:07,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:07" (3/3) ... [2020-10-29 09:10:07,033 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-queue-2.i [2020-10-29 09:10:07,048 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:10:07,054 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:10:07,071 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:10:07,111 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:10:07,111 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:10:07,112 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:10:07,112 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:10:07,118 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:10:07,118 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:10:07,118 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:10:07,119 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:10:07,147 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-10-29 09:10:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-29 09:10:07,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:07,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:07,161 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:07,170 INFO L82 PathProgramCache]: Analyzing trace with hash 218866609, now seen corresponding path program 1 times [2020-10-29 09:10:07,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:07,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768415976] [2020-10-29 09:10:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:07,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:07,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:07,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:07,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-29 09:10:07,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:07,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-29 09:10:07,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:07,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:07,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:07,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:07,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:10:07,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 09:10:07,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:07,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:07,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:07,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:07,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:07,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:10:07,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:07,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:07,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:07,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:07,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:07,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:07,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768415976] [2020-10-29 09:10:07,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:07,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:07,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300137613] [2020-10-29 09:10:07,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:07,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:07,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:07,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:07,791 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 4 states. [2020-10-29 09:10:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:08,090 INFO L93 Difference]: Finished difference Result 164 states and 300 transitions. [2020-10-29 09:10:08,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:08,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-29 09:10:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:08,103 INFO L225 Difference]: With dead ends: 164 [2020-10-29 09:10:08,104 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:10:08,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:08,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:10:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-29 09:10:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:10:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-29 09:10:08,162 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 11 [2020-10-29 09:10:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:08,162 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-29 09:10:08,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-29 09:10:08,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:10:08,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:08,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:08,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:10:08,165 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:08,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:08,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1246734287, now seen corresponding path program 1 times [2020-10-29 09:10:08,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:08,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974335975] [2020-10-29 09:10:08,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:08,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:08,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:08,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:10:08,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:08,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-29 09:10:08,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:08,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:08,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:08,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:10:08,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:10:08,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:08,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:08,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:08,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:08,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:08,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:08,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:08,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:08,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:08,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:08,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:08,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:08,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:08,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974335975] [2020-10-29 09:10:08,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:08,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:08,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211212457] [2020-10-29 09:10:08,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:08,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:08,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:08,525 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 4 states. [2020-10-29 09:10:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:08,723 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2020-10-29 09:10:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:08,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-29 09:10:08,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:08,725 INFO L225 Difference]: With dead ends: 71 [2020-10-29 09:10:08,725 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:10:08,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:08,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:10:08,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-29 09:10:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:10:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2020-10-29 09:10:08,739 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 15 [2020-10-29 09:10:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:08,739 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2020-10-29 09:10:08,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:08,740 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2020-10-29 09:10:08,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:10:08,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:08,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:08,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:10:08,741 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:08,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:08,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1069993799, now seen corresponding path program 1 times [2020-10-29 09:10:08,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:08,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322443894] [2020-10-29 09:10:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:08,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:08,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:08,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:10:08,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:08,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-29 09:10:08,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:08,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:08,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:08,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:08,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:10:08,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:08,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:08,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:08,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:08,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:08,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:08,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:08,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:08,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:08,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:08,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:08,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:08,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:08,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322443894] [2020-10-29 09:10:08,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:08,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:08,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623325684] [2020-10-29 09:10:08,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:08,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:08,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:08,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:08,855 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 4 states. [2020-10-29 09:10:09,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:09,045 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2020-10-29 09:10:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:09,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-29 09:10:09,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:09,047 INFO L225 Difference]: With dead ends: 146 [2020-10-29 09:10:09,048 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:10:09,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:10:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-29 09:10:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 09:10:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-29 09:10:09,061 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 18 [2020-10-29 09:10:09,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:09,062 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-29 09:10:09,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:09,062 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-29 09:10:09,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:10:09,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:09,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:09,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:10:09,064 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:09,065 INFO L82 PathProgramCache]: Analyzing trace with hash 937711355, now seen corresponding path program 1 times [2020-10-29 09:10:09,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:09,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770423938] [2020-10-29 09:10:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:09,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:09,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:09,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:09,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:09,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:10:09,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:09,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-29 09:10:09,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:09,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:09,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:09,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:09,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:10:09,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:09,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:09,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:09,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:09,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:09,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:09,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:09,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:09,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:09,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:09,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:09,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:09,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:09,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770423938] [2020-10-29 09:10:09,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:09,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:09,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465807518] [2020-10-29 09:10:09,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:09,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:09,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:09,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:09,773 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 5 states. [2020-10-29 09:10:10,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:10,008 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2020-10-29 09:10:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:10:10,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-29 09:10:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:10,012 INFO L225 Difference]: With dead ends: 97 [2020-10-29 09:10:10,012 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:10:10,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:10:10,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-29 09:10:10,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 09:10:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-29 09:10:10,030 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 23 [2020-10-29 09:10:10,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:10,033 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-29 09:10:10,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-29 09:10:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:10:10,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:10,035 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:10,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:10:10,037 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:10,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:10,038 INFO L82 PathProgramCache]: Analyzing trace with hash 309576248, now seen corresponding path program 1 times [2020-10-29 09:10:10,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:10,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558952856] [2020-10-29 09:10:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:10,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:10,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:10,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:10:10,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:10,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-29 09:10:10,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:10,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:10:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:10:10,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:10,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:10,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:10,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:10,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:10,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:10,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:10,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:10,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:10,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:10,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:10,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558952856] [2020-10-29 09:10:10,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:10,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:10:10,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816019708] [2020-10-29 09:10:10,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:10:10,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:10,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:10:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:10:10,482 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 7 states. [2020-10-29 09:10:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:10,867 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2020-10-29 09:10:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:10,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-29 09:10:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:10,869 INFO L225 Difference]: With dead ends: 130 [2020-10-29 09:10:10,870 INFO L226 Difference]: Without dead ends: 126 [2020-10-29 09:10:10,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:10,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-29 09:10:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 84. [2020-10-29 09:10:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:10:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-29 09:10:10,891 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 25 [2020-10-29 09:10:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:10,891 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-29 09:10:10,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:10:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-29 09:10:10,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:10:10,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:10,895 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:10,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:10:10,897 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:10,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1376318958, now seen corresponding path program 1 times [2020-10-29 09:10:10,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:10,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072738238] [2020-10-29 09:10:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:10,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:10,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:10,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:11,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:11,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:10:11,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:11,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-29 09:10:11,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:11,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:10:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:10:11,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:11,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:11,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:11,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:11,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:11,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:11,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:11,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:11,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:11,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:11,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:11,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:11,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:11,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072738238] [2020-10-29 09:10:11,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:11,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:10:11,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866949525] [2020-10-29 09:10:11,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:10:11,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:11,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:10:11,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:10:11,387 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 7 states. [2020-10-29 09:10:11,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:11,750 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2020-10-29 09:10:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:11,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-29 09:10:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:11,752 INFO L225 Difference]: With dead ends: 129 [2020-10-29 09:10:11,752 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 09:10:11,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:11,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 09:10:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 90. [2020-10-29 09:10:11,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-29 09:10:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2020-10-29 09:10:11,776 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 26 [2020-10-29 09:10:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:11,778 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2020-10-29 09:10:11,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:10:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2020-10-29 09:10:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:10:11,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:11,780 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:11,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:10:11,780 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:11,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1749170472, now seen corresponding path program 1 times [2020-10-29 09:10:11,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:11,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702932274] [2020-10-29 09:10:11,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:11,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:11,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:11,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:12,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:12,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:10:12,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:12,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-29 09:10:12,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:12,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:12,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:10:12,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:12,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:10:12,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:12,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:12,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:12,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:12,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:12,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:12,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 09:10:12,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:12,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:12,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:12,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:12,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:12,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:12,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702932274] [2020-10-29 09:10:12,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:12,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:10:12,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287161855] [2020-10-29 09:10:12,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:10:12,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:12,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:10:12,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:10:12,305 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand 7 states. [2020-10-29 09:10:12,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:12,667 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2020-10-29 09:10:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:12,668 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-29 09:10:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:12,669 INFO L225 Difference]: With dead ends: 128 [2020-10-29 09:10:12,669 INFO L226 Difference]: Without dead ends: 124 [2020-10-29 09:10:12,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-29 09:10:12,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2020-10-29 09:10:12,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:10:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2020-10-29 09:10:12,691 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 27 [2020-10-29 09:10:12,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:12,691 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2020-10-29 09:10:12,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:10:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2020-10-29 09:10:12,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:10:12,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:12,692 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:12,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:10:12,693 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:12,693 INFO L82 PathProgramCache]: Analyzing trace with hash 262399079, now seen corresponding path program 1 times [2020-10-29 09:10:12,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:12,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462011157] [2020-10-29 09:10:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:12,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:12,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:12,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:12,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:10:12,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:12,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-29 09:10:12,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:12,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:12,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:12,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:10:12,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:10:12,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:12,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:12,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:12,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:12,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:12,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:12,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:12,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:12,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:12,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:12,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:12,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:12,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:12,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462011157] [2020-10-29 09:10:12,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:12,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:12,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44358446] [2020-10-29 09:10:12,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:12,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:12,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:12,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:12,903 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand 4 states. [2020-10-29 09:10:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:13,104 INFO L93 Difference]: Finished difference Result 187 states and 235 transitions. [2020-10-29 09:10:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:13,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:10:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:13,106 INFO L225 Difference]: With dead ends: 187 [2020-10-29 09:10:13,108 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 09:10:13,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 09:10:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2020-10-29 09:10:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:10:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2020-10-29 09:10:13,121 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 29 [2020-10-29 09:10:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:13,121 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2020-10-29 09:10:13,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2020-10-29 09:10:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:10:13,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:13,122 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:13,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:10:13,123 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:13,123 INFO L82 PathProgramCache]: Analyzing trace with hash -84648472, now seen corresponding path program 1 times [2020-10-29 09:10:13,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:13,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107621077] [2020-10-29 09:10:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:13,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:13,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:13,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:13,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:10:13,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:13,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-29 09:10:13,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:13,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:10:13,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:13,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:13,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:13,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:13,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:13,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:13,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:13,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:13,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:13,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:13,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:13,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:13,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107621077] [2020-10-29 09:10:13,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:13,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:13,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921536575] [2020-10-29 09:10:13,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:13,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:13,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:13,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:13,861 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 8 states. [2020-10-29 09:10:14,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:14,204 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2020-10-29 09:10:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:14,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-29 09:10:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:14,207 INFO L225 Difference]: With dead ends: 100 [2020-10-29 09:10:14,207 INFO L226 Difference]: Without dead ends: 96 [2020-10-29 09:10:14,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-29 09:10:14,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2020-10-29 09:10:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 09:10:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-10-29 09:10:14,215 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 33 [2020-10-29 09:10:14,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:14,216 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-10-29 09:10:14,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:14,216 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-10-29 09:10:14,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:10:14,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:14,217 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:14,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:10:14,217 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:14,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2040254526, now seen corresponding path program 1 times [2020-10-29 09:10:14,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:14,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110955680] [2020-10-29 09:10:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:14,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:14,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:14,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:10:14,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:14,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-29 09:10:14,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:14,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:14,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:14,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:14,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:10:14,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:14,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:14,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:14,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:14,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:14,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:14,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:14,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:14,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:14,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:14,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110955680] [2020-10-29 09:10:14,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:14,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:14,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959155054] [2020-10-29 09:10:14,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:14,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:14,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:14,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:14,754 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 8 states. [2020-10-29 09:10:15,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:15,135 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2020-10-29 09:10:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:15,135 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-29 09:10:15,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:15,136 INFO L225 Difference]: With dead ends: 86 [2020-10-29 09:10:15,136 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 09:10:15,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 09:10:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-29 09:10:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 09:10:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-10-29 09:10:15,144 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 34 [2020-10-29 09:10:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:15,144 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-10-29 09:10:15,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-10-29 09:10:15,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:10:15,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:15,146 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:15,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:10:15,146 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:15,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1668646551, now seen corresponding path program 1 times [2020-10-29 09:10:15,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:15,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979026113] [2020-10-29 09:10:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:15,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:15,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:15,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:10:15,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:15,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-29 09:10:15,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:15,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:15,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:15,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:15,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:10:15,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:15,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:15,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:15,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:15,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:15,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:15,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:15,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:15,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:15,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:15,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:15,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:15,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:15,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979026113] [2020-10-29 09:10:15,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:15,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:15,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811678774] [2020-10-29 09:10:15,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:15,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:15,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:15,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:15,606 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 8 states. [2020-10-29 09:10:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:16,082 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2020-10-29 09:10:16,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:16,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-29 09:10:16,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:16,084 INFO L225 Difference]: With dead ends: 122 [2020-10-29 09:10:16,084 INFO L226 Difference]: Without dead ends: 118 [2020-10-29 09:10:16,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-29 09:10:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2020-10-29 09:10:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:10:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2020-10-29 09:10:16,096 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 35 [2020-10-29 09:10:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:16,097 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2020-10-29 09:10:16,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2020-10-29 09:10:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:10:16,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:16,098 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:16,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:10:16,098 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:16,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1652962952, now seen corresponding path program 1 times [2020-10-29 09:10:16,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:16,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027319249] [2020-10-29 09:10:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:16,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:16,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:16,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:16,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:16,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:10:16,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:16,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-29 09:10:16,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:16,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:16,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:16,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:16,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:10:16,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:16,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:16,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:16,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:16,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:16,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:16,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:16,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:16,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:16,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:16,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:16,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:16,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027319249] [2020-10-29 09:10:16,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:16,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:16,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911836891] [2020-10-29 09:10:16,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:16,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:16,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:16,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:16,810 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand 8 states. [2020-10-29 09:10:17,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:17,151 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-10-29 09:10:17,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:17,152 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-29 09:10:17,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:17,153 INFO L225 Difference]: With dead ends: 107 [2020-10-29 09:10:17,153 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:10:17,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:10:17,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-29 09:10:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-29 09:10:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2020-10-29 09:10:17,166 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 35 [2020-10-29 09:10:17,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:17,169 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2020-10-29 09:10:17,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:17,169 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2020-10-29 09:10:17,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:10:17,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:17,170 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:17,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:10:17,170 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:17,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1242507287, now seen corresponding path program 1 times [2020-10-29 09:10:17,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:17,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433055933] [2020-10-29 09:10:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:17,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:17,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:17,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:10:17,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:17,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-29 09:10:17,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:17,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:17,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:17,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:17,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:10:17,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:17,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:17,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:17,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:17,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:17,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:17,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:17,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:17,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:17,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:17,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:17,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:17,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:17,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433055933] [2020-10-29 09:10:17,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:17,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:17,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408849075] [2020-10-29 09:10:17,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:17,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:17,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:17,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:17,670 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand 8 states. [2020-10-29 09:10:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:18,164 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2020-10-29 09:10:18,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:18,164 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-29 09:10:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:18,165 INFO L225 Difference]: With dead ends: 166 [2020-10-29 09:10:18,166 INFO L226 Difference]: Without dead ends: 162 [2020-10-29 09:10:18,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-29 09:10:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 122. [2020-10-29 09:10:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:10:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 142 transitions. [2020-10-29 09:10:18,190 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 142 transitions. Word has length 37 [2020-10-29 09:10:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:18,191 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 142 transitions. [2020-10-29 09:10:18,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 142 transitions. [2020-10-29 09:10:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:10:18,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:18,192 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:18,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:10:18,193 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1804779986, now seen corresponding path program 1 times [2020-10-29 09:10:18,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:18,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123348361] [2020-10-29 09:10:18,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:18,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:18,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:10:18,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:18,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-29 09:10:18,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:18,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:18,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:18,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:18,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:10:18,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:19,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:19,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:19,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:19,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:19,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:19,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:19,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:19,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:19,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:19,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:19,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:19,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123348361] [2020-10-29 09:10:19,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:19,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:19,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908666500] [2020-10-29 09:10:19,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:19,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:19,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:19,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:19,186 INFO L87 Difference]: Start difference. First operand 122 states and 142 transitions. Second operand 10 states. [2020-10-29 09:10:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:19,928 INFO L93 Difference]: Finished difference Result 183 states and 212 transitions. [2020-10-29 09:10:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:10:19,928 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-29 09:10:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:19,930 INFO L225 Difference]: With dead ends: 183 [2020-10-29 09:10:19,931 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:10:19,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:10:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:10:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2020-10-29 09:10:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-29 09:10:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2020-10-29 09:10:19,944 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 38 [2020-10-29 09:10:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:19,944 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2020-10-29 09:10:19,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2020-10-29 09:10:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:10:19,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:19,945 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:19,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:10:19,945 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:19,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1324561949, now seen corresponding path program 1 times [2020-10-29 09:10:19,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:19,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647814867] [2020-10-29 09:10:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:19,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:20,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:10:20,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:20,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-29 09:10:20,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:20,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:20,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:20,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:10:20,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:20,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:20,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:20,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:20,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:20,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:20,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:20,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:20,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:20,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647814867] [2020-10-29 09:10:20,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:20,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:20,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477293057] [2020-10-29 09:10:20,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:20,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:20,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:20,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:20,586 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand 8 states. [2020-10-29 09:10:21,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:21,005 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2020-10-29 09:10:21,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:21,006 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-29 09:10:21,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:21,007 INFO L225 Difference]: With dead ends: 170 [2020-10-29 09:10:21,007 INFO L226 Difference]: Without dead ends: 166 [2020-10-29 09:10:21,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:21,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-29 09:10:21,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 138. [2020-10-29 09:10:21,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-29 09:10:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2020-10-29 09:10:21,019 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 38 [2020-10-29 09:10:21,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:21,019 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2020-10-29 09:10:21,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:21,019 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2020-10-29 09:10:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:10:21,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:21,020 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:21,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:10:21,020 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:21,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:21,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1953957478, now seen corresponding path program 1 times [2020-10-29 09:10:21,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:21,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638138931] [2020-10-29 09:10:21,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:21,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:10:21,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:21,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-29 09:10:21,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:21,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:21,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:21,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:10:21,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:10:21,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:21,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:21,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:21,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:21,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:10:21,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:21,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:21,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:21,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:21,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:21,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:10:21,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638138931] [2020-10-29 09:10:21,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:21,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:21,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237764232] [2020-10-29 09:10:21,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:21,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:21,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:21,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:21,232 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand 4 states. [2020-10-29 09:10:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:21,490 INFO L93 Difference]: Finished difference Result 255 states and 307 transitions. [2020-10-29 09:10:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:21,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-29 09:10:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:21,491 INFO L225 Difference]: With dead ends: 255 [2020-10-29 09:10:21,492 INFO L226 Difference]: Without dead ends: 155 [2020-10-29 09:10:21,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:21,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-29 09:10:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 136. [2020-10-29 09:10:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-29 09:10:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2020-10-29 09:10:21,503 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 41 [2020-10-29 09:10:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:21,503 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2020-10-29 09:10:21,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2020-10-29 09:10:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:10:21,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:21,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:21,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:10:21,505 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:21,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:21,506 INFO L82 PathProgramCache]: Analyzing trace with hash 989426657, now seen corresponding path program 1 times [2020-10-29 09:10:21,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:21,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477853675] [2020-10-29 09:10:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:22,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:10:22,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:10:22,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1155 [2020-10-29 09:10:22,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:22,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:22,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:22,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:10:22,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:10:22,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:22,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:22,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:22,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:22,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:22,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:22,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:22,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:22,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:22,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477853675] [2020-10-29 09:10:22,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:22,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:22,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856642323] [2020-10-29 09:10:22,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:22,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:22,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:22,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:22,737 INFO L87 Difference]: Start difference. First operand 136 states and 155 transitions. Second operand 5 states. [2020-10-29 09:10:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:22,955 INFO L93 Difference]: Finished difference Result 210 states and 243 transitions. [2020-10-29 09:10:22,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:10:22,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-29 09:10:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:22,957 INFO L225 Difference]: With dead ends: 210 [2020-10-29 09:10:22,957 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 09:10:22,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:22,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 09:10:22,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-29 09:10:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-29 09:10:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 140 transitions. [2020-10-29 09:10:22,977 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 140 transitions. Word has length 43 [2020-10-29 09:10:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:22,978 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 140 transitions. [2020-10-29 09:10:22,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 140 transitions. [2020-10-29 09:10:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:10:22,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:22,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:22,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:10:22,980 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:22,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:22,981 INFO L82 PathProgramCache]: Analyzing trace with hash 402620643, now seen corresponding path program 1 times [2020-10-29 09:10:22,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:22,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685959748] [2020-10-29 09:10:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:23,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:23,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:10:23,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:23,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-29 09:10:23,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:23,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:23,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:23,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:23,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:10:23,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:23,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:23,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:23,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:23,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:23,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:23,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:23,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:23,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:23,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:23,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:23,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:23,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685959748] [2020-10-29 09:10:23,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:23,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:23,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073989784] [2020-10-29 09:10:23,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:23,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:23,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:23,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:23,355 INFO L87 Difference]: Start difference. First operand 125 states and 140 transitions. Second operand 9 states. [2020-10-29 09:10:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:23,836 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2020-10-29 09:10:23,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:23,836 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-29 09:10:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:23,837 INFO L225 Difference]: With dead ends: 156 [2020-10-29 09:10:23,838 INFO L226 Difference]: Without dead ends: 116 [2020-10-29 09:10:23,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-29 09:10:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-29 09:10:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-29 09:10:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2020-10-29 09:10:23,852 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 43 [2020-10-29 09:10:23,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:23,852 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2020-10-29 09:10:23,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2020-10-29 09:10:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:10:23,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:23,853 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-29 09:10:23,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:10:23,854 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:23,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1070744259, now seen corresponding path program 1 times [2020-10-29 09:10:23,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:23,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522682689] [2020-10-29 09:10:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:23,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:24,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:24,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:10:24,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:24,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 794 [2020-10-29 09:10:24,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:24,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:24,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:24,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:24,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:10:24,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:24,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:24,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:24,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:24,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:24,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:24,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:24,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:24,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:24,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:24,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:24,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:24,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:24,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522682689] [2020-10-29 09:10:24,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:24,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:24,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154316397] [2020-10-29 09:10:24,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:24,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:24,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:24,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:24,855 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand 9 states. [2020-10-29 09:10:25,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:25,266 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2020-10-29 09:10:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:25,266 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-10-29 09:10:25,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:25,268 INFO L225 Difference]: With dead ends: 119 [2020-10-29 09:10:25,268 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 09:10:25,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:25,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 09:10:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-29 09:10:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-29 09:10:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2020-10-29 09:10:25,279 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 46 [2020-10-29 09:10:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:25,279 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2020-10-29 09:10:25,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2020-10-29 09:10:25,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:10:25,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:25,281 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-29 09:10:25,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:10:25,281 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:25,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:25,282 INFO L82 PathProgramCache]: Analyzing trace with hash -501133880, now seen corresponding path program 1 times [2020-10-29 09:10:25,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:25,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201768782] [2020-10-29 09:10:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:25,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:25,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:26,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:26,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:10:26,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:26,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1013 [2020-10-29 09:10:26,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:26,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:26,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:26,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:26,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:10:26,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:26,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:26,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:26,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:26,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:26,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:26,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:10:26,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:26,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:26,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:26,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:26,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:26,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:26,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201768782] [2020-10-29 09:10:26,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:26,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:26,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113452045] [2020-10-29 09:10:26,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:26,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:26,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:26,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:26,888 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 11 states. [2020-10-29 09:10:27,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:27,476 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2020-10-29 09:10:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:27,477 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-29 09:10:27,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:27,478 INFO L225 Difference]: With dead ends: 127 [2020-10-29 09:10:27,478 INFO L226 Difference]: Without dead ends: 123 [2020-10-29 09:10:27,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-29 09:10:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2020-10-29 09:10:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 09:10:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-10-29 09:10:27,488 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 47 [2020-10-29 09:10:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:27,488 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-10-29 09:10:27,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:27,489 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-10-29 09:10:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:10:27,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:27,490 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-29 09:10:27,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:10:27,490 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:27,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1666759241, now seen corresponding path program 1 times [2020-10-29 09:10:27,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:27,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237436723] [2020-10-29 09:10:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:27,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:28,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:10:28,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:28,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-29 09:10:28,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:28,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:28,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:28,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:28,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:10:28,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:28,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:28,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:28,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:28,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:28,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:28,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:28,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:28,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:28,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:28,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:28,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:28,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237436723] [2020-10-29 09:10:28,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:28,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:28,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785031242] [2020-10-29 09:10:28,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:28,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:28,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:28,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:28,206 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 9 states. [2020-10-29 09:10:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:28,620 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2020-10-29 09:10:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:28,620 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-29 09:10:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:28,621 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:10:28,622 INFO L226 Difference]: Without dead ends: 94 [2020-10-29 09:10:28,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-29 09:10:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-29 09:10:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 09:10:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2020-10-29 09:10:28,634 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 47 [2020-10-29 09:10:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:28,635 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2020-10-29 09:10:28,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:28,635 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2020-10-29 09:10:28,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:10:28,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:28,636 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-29 09:10:28,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:10:28,636 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:28,637 INFO L82 PathProgramCache]: Analyzing trace with hash -127104064, now seen corresponding path program 1 times [2020-10-29 09:10:28,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:28,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41894165] [2020-10-29 09:10:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:28,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:29,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:29,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:10:29,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:29,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-10-29 09:10:29,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:29,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:29,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:29,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:29,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:10:29,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:29,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:29,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:29,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:29,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:29,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:29,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:29,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:29,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:29,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:29,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:29,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:29,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41894165] [2020-10-29 09:10:29,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:29,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:29,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893903130] [2020-10-29 09:10:29,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:29,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:29,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:29,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:29,471 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand 9 states. [2020-10-29 09:10:30,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:30,073 INFO L93 Difference]: Finished difference Result 178 states and 194 transitions. [2020-10-29 09:10:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:30,074 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-29 09:10:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:30,075 INFO L225 Difference]: With dead ends: 178 [2020-10-29 09:10:30,076 INFO L226 Difference]: Without dead ends: 174 [2020-10-29 09:10:30,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-29 09:10:30,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2020-10-29 09:10:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-29 09:10:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 138 transitions. [2020-10-29 09:10:30,087 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 138 transitions. Word has length 50 [2020-10-29 09:10:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:30,087 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 138 transitions. [2020-10-29 09:10:30,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 138 transitions. [2020-10-29 09:10:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:10:30,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:30,088 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-29 09:10:30,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:10:30,089 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:30,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:30,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2035219383, now seen corresponding path program 1 times [2020-10-29 09:10:30,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:30,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410583298] [2020-10-29 09:10:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:10:30,143 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:10:30,144 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:10:30,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:10:30,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:10:30 BoogieIcfgContainer [2020-10-29 09:10:30,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:10:30,174 INFO L168 Benchmark]: Toolchain (without parser) took 24789.94 ms. Allocated memory was 157.3 MB in the beginning and 415.2 MB in the end (delta: 257.9 MB). Free memory was 130.2 MB in the beginning and 188.3 MB in the end (delta: -58.1 MB). Peak memory consumption was 200.3 MB. Max. memory is 8.0 GB. [2020-10-29 09:10:30,174 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 157.3 MB. Free memory is still 130.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:10:30,175 INFO L168 Benchmark]: CACSL2BoogieTranslator took 659.31 ms. Allocated memory is still 157.3 MB. Free memory was 129.6 MB in the beginning and 107.1 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:10:30,175 INFO L168 Benchmark]: Boogie Preprocessor took 79.02 ms. Allocated memory is still 157.3 MB. Free memory was 107.1 MB in the beginning and 104.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:10:30,176 INFO L168 Benchmark]: RCFGBuilder took 885.96 ms. Allocated memory is still 157.3 MB. Free memory was 103.7 MB in the beginning and 96.4 MB in the end (delta: 7.3 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. [2020-10-29 09:10:30,177 INFO L168 Benchmark]: TraceAbstraction took 23151.91 ms. Allocated memory was 157.3 MB in the beginning and 415.2 MB in the end (delta: 257.9 MB). Free memory was 95.9 MB in the beginning and 188.3 MB in the end (delta: -92.4 MB). Peak memory consumption was 166.6 MB. Max. memory is 8.0 GB. [2020-10-29 09:10:30,179 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 157.3 MB. Free memory is still 130.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 659.31 ms. Allocated memory is still 157.3 MB. Free memory was 129.6 MB in the beginning and 107.1 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 79.02 ms. Allocated memory is still 157.3 MB. Free memory was 107.1 MB in the beginning and 104.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 885.96 ms. Allocated memory is still 157.3 MB. Free memory was 103.7 MB in the beginning and 96.4 MB in the end (delta: 7.3 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23151.91 ms. Allocated memory was 157.3 MB in the beginning and 415.2 MB in the end (delta: 257.9 MB). Free memory was 95.9 MB in the beginning and 188.3 MB in the end (delta: -92.4 MB). Peak memory consumption was 166.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) [L999] head->prev = ((void*)0) [L1000] head->data = 0 [L1001] SLL* item = head; [L1002] int status = 0; [L1004] COND TRUE __VERIFIER_nondet_int() [L1006] item->next = malloc(sizeof(SLL)) [L1007] EXPR item->next [L1007] item->next->prev = item [L1008] EXPR item->next [L1008] item = item->next [L1009] item->next = ((void*)0) [L1011] COND TRUE !status [L1013] item->data = 1 [L1014] status = 1 [L1027] COND FALSE !(!(head != ((void*)0))) [L1028] COND FALSE !(!(item != ((void*)0))) [L1004] COND TRUE __VERIFIER_nondet_int() [L1006] item->next = malloc(sizeof(SLL)) [L1007] EXPR item->next [L1007] item->next->prev = item [L1008] EXPR item->next [L1008] item = item->next [L1009] item->next = ((void*)0) [L1011] COND FALSE !(!status) [L1016] COND TRUE status == 1 [L1018] item->data = 2 [L1019] status = 2 [L1027] COND FALSE !(!(head != ((void*)0))) [L1028] COND FALSE !(!(item != ((void*)0))) [L1004] COND TRUE __VERIFIER_nondet_int() [L1006] item->next = malloc(sizeof(SLL)) [L1007] EXPR item->next [L1007] item->next->prev = item [L1008] EXPR item->next [L1008] item = item->next [L1009] item->next = ((void*)0) [L1011] COND FALSE !(!status) [L1016] COND FALSE !(status == 1) [L1021] COND TRUE status >= 2 [L1023] item->data = 3 [L1024] status = 3 [L1027] COND FALSE !(!(head != ((void*)0))) [L1028] COND FALSE !(!(item != ((void*)0))) [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1031] COND FALSE !(!(head != ((void*)0))) [L1032] COND FALSE !(status == 1) [L1037] COND FALSE !(status == 2) [L1043] COND TRUE status == 3 [L1045] COND FALSE !(!(head != ((void*)0))) [L1046] EXPR head->next [L1046] COND FALSE !(!(head->next != ((void*)0))) [L1047] EXPR head->next [L1047] EXPR head->next->next [L1047] COND FALSE !(!(head->next->next != ((void*)0))) [L1048] EXPR head->next [L1048] EXPR head->next->next [L1048] EXPR head->next->next->next [L1048] COND FALSE !(!(head->next->next->next != ((void*)0))) [L1049] EXPR head->next [L1049] EXPR head->next->next [L1049] EXPR head->next->next->next [L1049] EXPR head->next->next->next->data [L1049] COND TRUE !(head->next->next->next->data != 3) [L1049] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "dll-queue-2.c", 16, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.0s, OverallIterations: 23, TraceHistogramMax: 4, AutomataDifference: 8.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1480 SDtfs, 1338 SDslu, 3880 SDs, 0 SdLazy, 4211 SolverSat, 332 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 216 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 22 MinimizatonAttempts, 359 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 13.0s InterpolantComputationTime, 794 NumberOfCodeBlocks, 794 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 719 ConstructedInterpolants, 0 QuantifiedInterpolants, 430430 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 7 PerfectInterpolantSequences, 25/215 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...