/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/eca-rers2012/Problem18_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:26:33,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:26:33,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:26:33,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:26:33,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:26:33,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:26:33,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:26:33,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:26:33,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:26:33,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:26:33,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:26:33,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:26:33,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:26:33,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:26:33,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:26:33,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:26:33,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:26:33,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:26:33,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:26:33,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:26:33,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:26:33,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:26:33,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:26:33,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:26:33,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:26:33,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:26:33,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:26:33,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:26:33,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:26:33,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:26:33,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:26:33,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:26:33,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:26:33,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:26:33,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:26:33,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:26:33,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:26:33,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:26:33,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:26:33,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:26:33,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:26:33,204 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 08:26:33,235 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:26:33,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:26:33,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:26:33,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:26:33,238 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:26:33,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:26:33,238 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:26:33,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:26:33,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:26:33,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:26:33,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:26:33,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:26:33,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:26:33,240 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:26:33,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:26:33,241 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:26:33,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:26:33,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:26:33,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:26:33,242 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:26:33,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:26:33,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:26:33,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:26:33,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:26:33,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:26:33,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:26:33,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:26:33,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:26:33,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:26:33,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:26:33,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:26:33,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:26:33,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:26:33,833 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:26:33,834 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:26:33,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label02.c [2020-10-29 08:26:33,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c92f70631/2cfd0f091dde4f97a820b58c1cecab55/FLAGd23fcc153 [2020-10-29 08:26:35,124 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:26:35,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem18_label02.c [2020-10-29 08:26:35,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c92f70631/2cfd0f091dde4f97a820b58c1cecab55/FLAGd23fcc153 [2020-10-29 08:26:35,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c92f70631/2cfd0f091dde4f97a820b58c1cecab55 [2020-10-29 08:26:35,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:26:35,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:26:35,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:26:35,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:26:35,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:26:35,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:26:35" (1/1) ... [2020-10-29 08:26:35,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e8cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:35, skipping insertion in model container [2020-10-29 08:26:35,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:26:35" (1/1) ... [2020-10-29 08:26:35,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:26:35,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:26:37,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:26:37,035 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:26:37,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:26:37,581 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:26:37,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:37 WrapperNode [2020-10-29 08:26:37,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:26:37,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:26:37,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:26:37,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:26:37,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:37" (1/1) ... [2020-10-29 08:26:37,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:37" (1/1) ... [2020-10-29 08:26:37,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:37" (1/1) ... [2020-10-29 08:26:37,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:37" (1/1) ... [2020-10-29 08:26:37,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:37" (1/1) ... [2020-10-29 08:26:37,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:37" (1/1) ... [2020-10-29 08:26:37,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:37" (1/1) ... [2020-10-29 08:26:37,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:26:37,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:26:37,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:26:37,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:26:37,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:37" (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 08:26:38,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:26:38,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:26:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:26:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:26:38,020 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:26:38,020 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:26:38,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:26:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:26:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:26:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:26:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:26:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:26:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:26:38,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:26:38,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:26:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:26:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:26:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:26:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:26:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:26:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:26:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:26:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:26:42,740 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:26:42,741 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:26:42,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:26:42 BoogieIcfgContainer [2020-10-29 08:26:42,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:26:42,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:26:42,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:26:42,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:26:42,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:26:35" (1/3) ... [2020-10-29 08:26:42,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76270de5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:26:42, skipping insertion in model container [2020-10-29 08:26:42,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:26:37" (2/3) ... [2020-10-29 08:26:42,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76270de5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:26:42, skipping insertion in model container [2020-10-29 08:26:42,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:26:42" (3/3) ... [2020-10-29 08:26:42,766 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label02.c [2020-10-29 08:26:42,783 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:26:42,792 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:26:42,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:26:42,857 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:26:42,858 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:26:42,858 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:26:42,858 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:26:42,858 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:26:42,858 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:26:42,859 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:26:42,859 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:26:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states. [2020-10-29 08:26:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 08:26:42,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:42,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:42,925 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:42,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1645980824, now seen corresponding path program 1 times [2020-10-29 08:26:42,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:42,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380121927] [2020-10-29 08:26:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:43,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:44,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:44,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 08:26:44,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:44,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-29 08:26:44,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:44,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:44,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:26:44,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:26:44,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 08:26:44,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-29 08:26:44,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:44,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:44,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:44,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:44,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:44,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-29 08:26:44,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:44,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:44,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:44,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:44,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:26:44,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:26:44,623 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 08:26:44,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380121927] [2020-10-29 08:26:44,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:26:44,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 08:26:44,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179335166] [2020-10-29 08:26:44,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:26:44,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:26:44,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:26:44,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:26:44,670 INFO L87 Difference]: Start difference. First operand 778 states. Second operand 5 states. [2020-10-29 08:27:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:01,028 INFO L93 Difference]: Finished difference Result 2989 states and 5773 transitions. [2020-10-29 08:27:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 08:27:01,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-29 08:27:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:01,068 INFO L225 Difference]: With dead ends: 2989 [2020-10-29 08:27:01,068 INFO L226 Difference]: Without dead ends: 2143 [2020-10-29 08:27:01,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:27:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2020-10-29 08:27:01,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 2136. [2020-10-29 08:27:01,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2136 states. [2020-10-29 08:27:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 3564 transitions. [2020-10-29 08:27:01,299 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 3564 transitions. Word has length 68 [2020-10-29 08:27:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:01,303 INFO L481 AbstractCegarLoop]: Abstraction has 2136 states and 3564 transitions. [2020-10-29 08:27:01,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:27:01,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 3564 transitions. [2020-10-29 08:27:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-29 08:27:01,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:01,321 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:27:01,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:27:01,321 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:01,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:01,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1062767680, now seen corresponding path program 1 times [2020-10-29 08:27:01,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:01,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143101209] [2020-10-29 08:27:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:01,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:01,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:02,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:04,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:04,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-29 08:27:04,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:27:04,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2640 [2020-10-29 08:27:04,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:04,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:04,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:04,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-29 08:27:04,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 08:27:04,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:27:04,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:04,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:04,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:04,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:04,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:04,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 08:27:04,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:04,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:04,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:04,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:04,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:04,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:27:04,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:04,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:04,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:04,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 08:27:04,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:04,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-29 08:27:04,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:04,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:04,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:04,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:04,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 08:27:04,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:27:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:27:04,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143101209] [2020-10-29 08:27:04,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:04,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 08:27:04,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925427401] [2020-10-29 08:27:04,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 08:27:04,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 08:27:04,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:27:04,488 INFO L87 Difference]: Start difference. First operand 2136 states and 3564 transitions. Second operand 6 states. [2020-10-29 08:27:04,659 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:27:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:26,309 INFO L93 Difference]: Finished difference Result 8538 states and 14485 transitions. [2020-10-29 08:27:26,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 08:27:26,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2020-10-29 08:27:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:26,361 INFO L225 Difference]: With dead ends: 8538 [2020-10-29 08:27:26,362 INFO L226 Difference]: Without dead ends: 6408 [2020-10-29 08:27:26,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:27:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2020-10-29 08:27:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 6404. [2020-10-29 08:27:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6404 states. [2020-10-29 08:27:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6404 states to 6404 states and 9969 transitions. [2020-10-29 08:27:26,632 INFO L78 Accepts]: Start accepts. Automaton has 6404 states and 9969 transitions. Word has length 138 [2020-10-29 08:27:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:26,635 INFO L481 AbstractCegarLoop]: Abstraction has 6404 states and 9969 transitions. [2020-10-29 08:27:26,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 08:27:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 6404 states and 9969 transitions. [2020-10-29 08:27:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-29 08:27:26,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:26,647 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:27:26,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:27:26,648 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:26,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:26,651 INFO L82 PathProgramCache]: Analyzing trace with hash -220376776, now seen corresponding path program 1 times [2020-10-29 08:27:26,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:26,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159681588] [2020-10-29 08:27:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:26,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:27,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:27,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:27,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-29 08:27:27,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:27:27,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-10-29 08:27:27,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:27,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:27,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:27,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-29 08:27:27,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 08:27:27,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:27,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:27,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:27,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:27,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:27,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:27,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 08:27:27,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:27,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:27,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:27,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:27,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:27,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:27,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:27,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:27,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:27,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 08:27:27,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:27,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-29 08:27:27,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:27,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:27,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:27,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:27,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 08:27:27,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:27:28,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159681588] [2020-10-29 08:27:28,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:28,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:27:28,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013105931] [2020-10-29 08:27:28,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:27:28,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:27:28,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:27:28,018 INFO L87 Difference]: Start difference. First operand 6404 states and 9969 transitions. Second operand 5 states. [2020-10-29 08:27:40,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:40,569 INFO L93 Difference]: Finished difference Result 19193 states and 30435 transitions. [2020-10-29 08:27:40,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:27:40,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-10-29 08:27:40,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:40,731 INFO L225 Difference]: With dead ends: 19193 [2020-10-29 08:27:40,731 INFO L226 Difference]: Without dead ends: 12795 [2020-10-29 08:27:40,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:27:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12795 states. [2020-10-29 08:27:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12795 to 12089. [2020-10-29 08:27:41,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12089 states. [2020-10-29 08:27:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12089 states to 12089 states and 17134 transitions. [2020-10-29 08:27:41,130 INFO L78 Accepts]: Start accepts. Automaton has 12089 states and 17134 transitions. Word has length 142 [2020-10-29 08:27:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:41,131 INFO L481 AbstractCegarLoop]: Abstraction has 12089 states and 17134 transitions. [2020-10-29 08:27:41,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:27:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 12089 states and 17134 transitions. [2020-10-29 08:27:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-29 08:27:41,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:41,136 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:27:41,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:27:41,137 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1244987778, now seen corresponding path program 1 times [2020-10-29 08:27:41,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:41,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707240629] [2020-10-29 08:27:41,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:41,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:41,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:41,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:43,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:43,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-29 08:27:43,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:27:43,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2207 [2020-10-29 08:27:43,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:43,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:27:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:27:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-29 08:27:43,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:27:43,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:43,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:43,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:43,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:43,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:43,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 08:27:43,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:43,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:43,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:43,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:43,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:27:43,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:27:43,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:43,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:43,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:43,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 08:27:43,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:43,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-29 08:27:43,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:43,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:43,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:43,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:43,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 08:27:43,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 08:27:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:27:43,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707240629] [2020-10-29 08:27:43,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:27:43,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:27:43,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919857284] [2020-10-29 08:27:43,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:27:43,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:43,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:27:43,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:27:43,966 INFO L87 Difference]: Start difference. First operand 12089 states and 17134 transitions. Second operand 7 states. [2020-10-29 08:27:57,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:57,121 INFO L93 Difference]: Finished difference Result 30719 states and 45481 transitions. [2020-10-29 08:27:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:27:57,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2020-10-29 08:27:57,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:57,222 INFO L225 Difference]: With dead ends: 30719 [2020-10-29 08:27:57,222 INFO L226 Difference]: Without dead ends: 18636 [2020-10-29 08:27:57,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:27:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18636 states. [2020-10-29 08:27:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18636 to 14354. [2020-10-29 08:27:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14354 states. [2020-10-29 08:27:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14354 states to 14354 states and 20003 transitions. [2020-10-29 08:27:57,776 INFO L78 Accepts]: Start accepts. Automaton has 14354 states and 20003 transitions. Word has length 163 [2020-10-29 08:27:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:57,777 INFO L481 AbstractCegarLoop]: Abstraction has 14354 states and 20003 transitions. [2020-10-29 08:27:57,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:27:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 14354 states and 20003 transitions. [2020-10-29 08:27:57,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-29 08:27:57,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:57,784 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:27:57,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:27:57,784 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:57,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash 40463912, now seen corresponding path program 1 times [2020-10-29 08:27:57,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:57,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806702308] [2020-10-29 08:27:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:57,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:57,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:58,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:00,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:02,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:02,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-29 08:28:02,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:28:02,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4406 [2020-10-29 08:28:02,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:02,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:02,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:02,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-29 08:28:02,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-29 08:28:02,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:28:02,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:28:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:02,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:02,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:02,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:28:02,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:02,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 08:28:02,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:02,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:02,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:28:02,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:02,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:28:02,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:02,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:28:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:02,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:02,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:02,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:28:02,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:02,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-29 08:28:02,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:02,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:02,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:28:02,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:02,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 08:28:02,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:28:02,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-29 08:28:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:02,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:02,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:02,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 08:28:02,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:02,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-29 08:28:02,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:02,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:02,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:02,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:28:02,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 08:28:02,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:28:02,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806702308] [2020-10-29 08:28:02,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:28:02,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:28:02,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608885336] [2020-10-29 08:28:02,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:28:02,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:28:02,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:28:02,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:28:02,840 INFO L87 Difference]: Start difference. First operand 14354 states and 20003 transitions. Second operand 7 states. [2020-10-29 08:28:16,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:28:16,437 INFO L93 Difference]: Finished difference Result 28727 states and 40129 transitions. [2020-10-29 08:28:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:28:16,439 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 234 [2020-10-29 08:28:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:28:16,504 INFO L225 Difference]: With dead ends: 28727 [2020-10-29 08:28:16,505 INFO L226 Difference]: Without dead ends: 14379 [2020-10-29 08:28:16,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:28:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14379 states. [2020-10-29 08:28:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14379 to 14367. [2020-10-29 08:28:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14367 states. [2020-10-29 08:28:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14367 states to 14367 states and 17891 transitions. [2020-10-29 08:28:16,894 INFO L78 Accepts]: Start accepts. Automaton has 14367 states and 17891 transitions. Word has length 234 [2020-10-29 08:28:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:28:16,895 INFO L481 AbstractCegarLoop]: Abstraction has 14367 states and 17891 transitions. [2020-10-29 08:28:16,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:28:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 14367 states and 17891 transitions. [2020-10-29 08:28:16,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-29 08:28:16,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:28:16,905 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:28:16,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 08:28:16,905 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:28:16,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:28:16,906 INFO L82 PathProgramCache]: Analyzing trace with hash -35071226, now seen corresponding path program 1 times [2020-10-29 08:28:16,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:28:16,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476029715] [2020-10-29 08:28:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:28:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:16,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:17,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:17,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:21,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:21,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:21,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-29 08:28:21,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:28:21,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 08:28:21,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:21,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:21,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:21,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 156 [2020-10-29 08:28:21,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-29 08:28:21,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:28:22,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:28:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:22,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:22,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:22,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:28:22,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:22,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 08:28:22,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:22,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:28:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:28:22,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:22,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:28:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:22,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:22,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:22,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:28:22,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:22,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:28:22,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:22,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:22,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:28:22,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:22,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:28:22,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:22,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-29 08:28:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:22,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:22,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:22,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 08:28:22,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:22,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-29 08:28:22,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:22,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:22,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:28:22,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:22,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 08:28:22,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:22,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-10-29 08:28:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:22,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:22,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:22,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 08:28:22,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:22,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-29 08:28:22,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:22,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:22,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:22,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:28:22,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 08:28:22,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 323 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-29 08:28:22,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476029715] [2020-10-29 08:28:22,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:28:22,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:28:22,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403295653] [2020-10-29 08:28:22,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:28:22,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:28:22,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:28:22,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:28:22,656 INFO L87 Difference]: Start difference. First operand 14367 states and 17891 transitions. Second operand 7 states. [2020-10-29 08:28:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:28:41,896 INFO L93 Difference]: Finished difference Result 34702 states and 43384 transitions. [2020-10-29 08:28:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:28:41,898 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 307 [2020-10-29 08:28:41,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:28:41,951 INFO L225 Difference]: With dead ends: 34702 [2020-10-29 08:28:41,951 INFO L226 Difference]: Without dead ends: 18847 [2020-10-29 08:28:41,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:28:42,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18847 states. [2020-10-29 08:28:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18847 to 18107. [2020-10-29 08:28:42,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18107 states. [2020-10-29 08:28:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18107 states to 18107 states and 20027 transitions. [2020-10-29 08:28:42,367 INFO L78 Accepts]: Start accepts. Automaton has 18107 states and 20027 transitions. Word has length 307 [2020-10-29 08:28:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:28:42,368 INFO L481 AbstractCegarLoop]: Abstraction has 18107 states and 20027 transitions. [2020-10-29 08:28:42,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:28:42,368 INFO L276 IsEmpty]: Start isEmpty. Operand 18107 states and 20027 transitions. [2020-10-29 08:28:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-10-29 08:28:42,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:28:42,385 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:28:42,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 08:28:42,385 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:28:42,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:28:42,386 INFO L82 PathProgramCache]: Analyzing trace with hash 236352072, now seen corresponding path program 1 times [2020-10-29 08:28:42,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:28:42,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027285227] [2020-10-29 08:28:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:28:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:42,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:42,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:42,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:43,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:47,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:47,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-29 08:28:47,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:28:47,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 08:28:47,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:47,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:47,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:47,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 189 [2020-10-29 08:28:47,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-29 08:28:47,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:47,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:28:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:47,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:47,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:47,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:28:47,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:47,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 08:28:47,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:47,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:47,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:28:47,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:47,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:28:47,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:47,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:28:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:47,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:47,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:47,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:28:47,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:47,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 08:28:47,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:47,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:28:47,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:47,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:28:47,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:47,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-29 08:28:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:47,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:47,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:47,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 08:28:47,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:47,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-29 08:28:47,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:47,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:47,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:28:47,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:47,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-29 08:28:47,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:47,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-29 08:28:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:47,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:47,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:47,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 08:28:47,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:47,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-29 08:28:47,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:47,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:47,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:47,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:28:47,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 08:28:47,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 345 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-29 08:28:48,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027285227] [2020-10-29 08:28:48,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:28:48,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:28:48,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92406265] [2020-10-29 08:28:48,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:28:48,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:28:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:28:48,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:28:48,294 INFO L87 Difference]: Start difference. First operand 18107 states and 20027 transitions. Second operand 7 states. [2020-10-29 08:29:00,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:29:00,968 INFO L93 Difference]: Finished difference Result 43240 states and 50377 transitions. [2020-10-29 08:29:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:29:00,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 340 [2020-10-29 08:29:00,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:29:01,055 INFO L225 Difference]: With dead ends: 43240 [2020-10-29 08:29:01,055 INFO L226 Difference]: Without dead ends: 25143 [2020-10-29 08:29:01,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:29:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25143 states. [2020-10-29 08:29:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25143 to 24840. [2020-10-29 08:29:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24840 states. [2020-10-29 08:29:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24840 states to 24840 states and 27652 transitions. [2020-10-29 08:29:01,687 INFO L78 Accepts]: Start accepts. Automaton has 24840 states and 27652 transitions. Word has length 340 [2020-10-29 08:29:01,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:29:01,688 INFO L481 AbstractCegarLoop]: Abstraction has 24840 states and 27652 transitions. [2020-10-29 08:29:01,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:29:01,688 INFO L276 IsEmpty]: Start isEmpty. Operand 24840 states and 27652 transitions. [2020-10-29 08:29:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-10-29 08:29:01,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:29:01,715 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:29:01,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 08:29:01,715 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:29:01,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:29:01,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1761272710, now seen corresponding path program 1 times [2020-10-29 08:29:01,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:29:01,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304708845] [2020-10-29 08:29:01,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:29:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:01,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:01,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:01,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:03,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:06,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:06,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 387 [2020-10-29 08:29:06,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:29:06,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 08:29:06,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:06,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:06,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:29:06,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-29 08:29:06,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-29 08:29:06,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:06,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:29:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:06,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:06,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:06,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:29:06,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:06,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 08:29:06,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:06,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:29:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:29:06,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:06,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:29:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:06,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:06,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:06,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:29:06,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:06,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-29 08:29:06,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:06,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:06,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:29:06,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:06,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 08:29:06,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:07,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-29 08:29:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:07,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:07,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:07,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-29 08:29:07,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:07,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-29 08:29:07,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:07,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:07,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:29:07,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:29:07,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-29 08:29:07,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:07,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-10-29 08:29:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:07,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:07,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:07,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 08:29:07,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:07,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-29 08:29:07,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:07,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:29:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-29 08:29:07,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:29:07,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 252 proven. 94 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-29 08:29:07,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304708845] [2020-10-29 08:29:07,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:29:07,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:29:07,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305978909] [2020-10-29 08:29:07,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:29:07,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:29:07,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:29:07,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:29:07,808 INFO L87 Difference]: Start difference. First operand 24840 states and 27652 transitions. Second operand 7 states. [2020-10-29 08:29:09,549 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:29:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:29:24,884 INFO L93 Difference]: Finished difference Result 55724 states and 64381 transitions. [2020-10-29 08:29:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:29:24,885 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 371 [2020-10-29 08:29:24,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:29:24,999 INFO L225 Difference]: With dead ends: 55724 [2020-10-29 08:29:25,000 INFO L226 Difference]: Without dead ends: 30176 [2020-10-29 08:29:25,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:29:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30176 states. [2020-10-29 08:29:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30176 to 29212. [2020-10-29 08:29:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29212 states. [2020-10-29 08:29:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29212 states to 29212 states and 32429 transitions. [2020-10-29 08:29:25,900 INFO L78 Accepts]: Start accepts. Automaton has 29212 states and 32429 transitions. Word has length 371 [2020-10-29 08:29:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:29:25,901 INFO L481 AbstractCegarLoop]: Abstraction has 29212 states and 32429 transitions. [2020-10-29 08:29:25,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:29:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 29212 states and 32429 transitions. [2020-10-29 08:29:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-29 08:29:25,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:29:25,938 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:29:25,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 08:29:25,938 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:29:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:29:25,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1078878430, now seen corresponding path program 1 times [2020-10-29 08:29:25,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:29:25,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895762958] [2020-10-29 08:29:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:29:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:26,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:26,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:26,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:27,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:31,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:31,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-29 08:29:31,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:29:31,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-29 08:29:31,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:31,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:31,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:29:31,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-29 08:29:31,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-29 08:29:31,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:31,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:29:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:31,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:31,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:31,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:29:31,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:31,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 08:29:31,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:31,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:31,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:29:31,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:31,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:29:31,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:31,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:29:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:31,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:31,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:31,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 08:29:31,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:31,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-29 08:29:31,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:31,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:31,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:29:31,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:31,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-29 08:29:31,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:31,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-29 08:29:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:31,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:31,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:31,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-29 08:29:31,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:31,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-29 08:29:31,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:31,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:31,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:29:31,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:29:31,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-29 08:29:31,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:29:31,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-10-29 08:29:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:31,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:31,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:31,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 08:29:31,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:31,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-29 08:29:31,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:31,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:31,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:29:31,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-29 08:29:31,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:29:31,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:29:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 270 proven. 94 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-29 08:29:31,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895762958] [2020-10-29 08:29:31,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:29:31,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:29:31,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240118225] [2020-10-29 08:29:31,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:29:31,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:29:31,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:29:31,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:29:31,981 INFO L87 Difference]: Start difference. First operand 29212 states and 32429 transitions. Second operand 7 states. [2020-10-29 08:29:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:29:49,752 INFO L93 Difference]: Finished difference Result 75990 states and 88374 transitions. [2020-10-29 08:29:49,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:29:49,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 389 [2020-10-29 08:29:49,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:29:49,881 INFO L225 Difference]: With dead ends: 75990 [2020-10-29 08:29:49,881 INFO L226 Difference]: Without dead ends: 46788 [2020-10-29 08:29:49,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:29:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46788 states. [2020-10-29 08:29:50,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46788 to 44976. [2020-10-29 08:29:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44976 states. [2020-10-29 08:29:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44976 states to 44976 states and 49650 transitions. [2020-10-29 08:29:51,326 INFO L78 Accepts]: Start accepts. Automaton has 44976 states and 49650 transitions. Word has length 389 [2020-10-29 08:29:51,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:29:51,326 INFO L481 AbstractCegarLoop]: Abstraction has 44976 states and 49650 transitions. [2020-10-29 08:29:51,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:29:51,327 INFO L276 IsEmpty]: Start isEmpty. Operand 44976 states and 49650 transitions. [2020-10-29 08:29:51,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-10-29 08:29:51,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:29:51,396 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:29:51,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 08:29:51,397 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:29:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:29:51,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1086080888, now seen corresponding path program 1 times [2020-10-29 08:29:51,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:29:51,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425678880] [2020-10-29 08:29:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:29:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:51,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:51,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:51,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:52,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:56,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:56,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 424 [2020-10-29 08:29:56,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:29:56,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 08:29:56,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:56,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:56,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:29:56,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 257 [2020-10-29 08:29:56,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-29 08:29:56,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:56,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:29:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:56,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:56,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:56,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:29:56,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:56,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 08:29:56,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:56,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:56,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:29:56,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:56,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:29:56,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:56,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:29:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:56,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:56,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:56,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 08:29:56,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:56,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 08:29:56,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:56,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:29:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:29:56,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:56,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-10-29 08:29:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:56,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:56,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:56,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-29 08:29:56,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:56,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-29 08:29:56,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:56,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:29:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-29 08:29:56,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:56,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2020-10-29 08:29:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:56,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:56,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:56,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 08:29:56,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:56,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-29 08:29:56,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:56,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:56,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:29:56,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:29:56,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 08:29:56,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:29:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 369 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-10-29 08:29:57,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425678880] [2020-10-29 08:29:57,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:29:57,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:29:57,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247287347] [2020-10-29 08:29:57,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:29:57,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:29:57,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:29:57,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:29:57,191 INFO L87 Difference]: Start difference. First operand 44976 states and 49650 transitions. Second operand 7 states.