/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=DEEPEST --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/Problem17_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:56:10,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:56:10,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:56:11,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:56:11,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:56:11,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:56:11,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:56:11,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:56:11,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:56:11,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:56:11,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:56:11,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:56:11,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:56:11,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:56:11,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:56:11,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:56:11,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:56:11,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:56:11,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:56:11,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:56:11,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:56:11,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:56:11,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:56:11,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:56:11,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:56:11,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:56:11,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:56:11,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:56:11,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:56:11,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:56:11,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:56:11,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:56:11,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:56:11,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:56:11,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:56:11,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:56:11,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:56:11,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:56:11,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:56:11,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:56:11,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:56:11,161 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 [2020-10-27 18:56:11,214 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:56:11,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:56:11,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:56:11,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:56:11,220 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:56:11,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:56:11,221 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:56:11,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:56:11,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:56:11,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:56:11,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:56:11,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:56:11,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:56:11,224 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:56:11,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:56:11,225 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:56:11,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:56:11,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:56:11,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:56:11,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:56:11,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:56:11,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:56:11,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:56:11,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:56:11,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:56:11,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:56:11,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:56:11,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:56:11,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:56:11,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:56:11,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:56:11,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:56:11,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:56:11,730 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:56:11,730 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:56:11,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label35.c [2020-10-27 18:56:11,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e034f045/98e633e2189240c198c90eab177c13d3/FLAG3ee4cacdd [2020-10-27 18:56:12,815 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:56:12,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label35.c [2020-10-27 18:56:12,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e034f045/98e633e2189240c198c90eab177c13d3/FLAG3ee4cacdd [2020-10-27 18:56:12,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e034f045/98e633e2189240c198c90eab177c13d3 [2020-10-27 18:56:12,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:56:12,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:56:12,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:56:12,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:56:12,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:56:12,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:56:12" (1/1) ... [2020-10-27 18:56:12,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2228acf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:12, skipping insertion in model container [2020-10-27 18:56:12,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:56:12" (1/1) ... [2020-10-27 18:56:12,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:56:13,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:56:14,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:56:14,213 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:56:14,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:56:14,826 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:56:14,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14 WrapperNode [2020-10-27 18:56:14,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:56:14,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:56:14,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:56:14,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:56:14,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:14,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:14,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:14,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:15,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:15,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:15,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:15,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:56:15,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:56:15,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:56:15,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:56:15,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (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 [2020-10-27 18:56:15,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:56:15,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:56:15,217 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:56:15,217 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:56:15,218 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:56:15,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:56:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:56:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:56:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:56:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:56:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:56:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:56:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:56:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:56:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:56:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:56:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:56:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:56:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:56:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:56:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:56:25,672 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:56:25,673 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:56:25,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:56:25 BoogieIcfgContainer [2020-10-27 18:56:25,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:56:25,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:56:25,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:56:25,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:56:25,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:56:12" (1/3) ... [2020-10-27 18:56:25,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc097f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:56:25, skipping insertion in model container [2020-10-27 18:56:25,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (2/3) ... [2020-10-27 18:56:25,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc097f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:56:25, skipping insertion in model container [2020-10-27 18:56:25,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:56:25" (3/3) ... [2020-10-27 18:56:25,688 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label35.c [2020-10-27 18:56:25,704 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:56:25,712 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:56:25,730 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:56:25,771 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:56:25,771 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:56:25,771 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:56:25,771 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:56:25,772 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:56:25,772 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:56:25,772 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:56:25,772 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:56:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 18:56:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 18:56:25,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:56:25,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:56:25,819 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:56:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:56:25,827 INFO L82 PathProgramCache]: Analyzing trace with hash 872651642, now seen corresponding path program 1 times [2020-10-27 18:56:25,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:56:25,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46014856] [2020-10-27 18:56:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:56:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:26,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:26,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:26,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 18:56:26,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:26,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-27 18:56:26,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:26,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:56:26,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:56:26,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 18:56:26,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:56:26,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:56:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:26,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:26,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:26,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:56:26,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:26,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 18:56:26,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:56:26,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:56:26,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:56:26,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:56:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:56:27,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46014856] [2020-10-27 18:56:27,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:56:27,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:56:27,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728763358] [2020-10-27 18:56:27,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:56:27,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:56:27,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:56:27,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:56:27,052 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 18:56:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:56:44,154 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 18:56:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:56:44,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 18:56:44,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:56:44,193 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 18:56:44,194 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 18:56:44,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:56:44,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 18:56:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 18:56:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 18:56:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 18:56:44,417 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 14 [2020-10-27 18:56:44,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:56:44,417 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 18:56:44,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:56:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 18:56:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 18:56:44,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:56:44,429 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:56:44,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:56:44,429 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:56:44,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:56:44,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1323374970, now seen corresponding path program 1 times [2020-10-27 18:56:44,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:56:44,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488617026] [2020-10-27 18:56:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:56:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:44,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:45,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:45,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:46,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:46,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 18:56:46,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:56:46,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1535 [2020-10-27 18:56:46,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:46,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:56:46,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 18:56:46,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 18:56:46,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:56:46,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:56:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:46,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:46,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:46,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:56:46,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:46,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 18:56:46,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:46,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:56:46,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:56:46,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:56:46,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:56:46,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:56:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:46,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:46,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:46,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:56:46,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:46,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 18:56:46,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:56:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:56:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 18:56:46,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:56:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:56:46,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488617026] [2020-10-27 18:56:46,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:56:46,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:56:46,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652908359] [2020-10-27 18:56:46,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:56:46,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:56:46,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:56:46,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:56:46,431 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 5 states. [2020-10-27 18:57:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:57:00,067 INFO L93 Difference]: Finished difference Result 2866 states and 4442 transitions. [2020-10-27 18:57:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:57:00,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-27 18:57:00,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:57:00,081 INFO L225 Difference]: With dead ends: 2866 [2020-10-27 18:57:00,081 INFO L226 Difference]: Without dead ends: 1880 [2020-10-27 18:57:00,085 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 [2020-10-27 18:57:00,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2020-10-27 18:57:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1876. [2020-10-27 18:57:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1876 states. [2020-10-27 18:57:00,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2567 transitions. [2020-10-27 18:57:00,152 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2567 transitions. Word has length 85 [2020-10-27 18:57:00,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:57:00,153 INFO L481 AbstractCegarLoop]: Abstraction has 1876 states and 2567 transitions. [2020-10-27 18:57:00,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:57:00,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2567 transitions. [2020-10-27 18:57:00,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 18:57:00,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:57:00,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:57:00,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:57:00,157 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:57:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:57:00,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1890169273, now seen corresponding path program 1 times [2020-10-27 18:57:00,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:57:00,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940887884] [2020-10-27 18:57:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:57:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:00,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:00,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:00,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:57:00,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:00,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-27 18:57:00,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:00,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:57:00,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 18:57:00,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 18:57:00,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:00,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:57:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:00,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:00,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:00,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:57:00,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:00,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 18:57:00,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:00,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:57:00,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:00,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:57:00,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:57:00,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:57:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:00,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:00,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:00,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:57:00,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:00,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 18:57:00,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:57:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:57:00,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:57:00,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940887884] [2020-10-27 18:57:00,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:57:00,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:57:00,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887696091] [2020-10-27 18:57:00,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:57:00,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:57:00,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:57:00,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:57:00,910 INFO L87 Difference]: Start difference. First operand 1876 states and 2567 transitions. Second operand 5 states. [2020-10-27 18:57:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:57:16,816 INFO L93 Difference]: Finished difference Result 3757 states and 5475 transitions. [2020-10-27 18:57:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:57:16,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-10-27 18:57:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:57:16,833 INFO L225 Difference]: With dead ends: 3757 [2020-10-27 18:57:16,833 INFO L226 Difference]: Without dead ends: 2773 [2020-10-27 18:57:16,836 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 [2020-10-27 18:57:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2020-10-27 18:57:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2767. [2020-10-27 18:57:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2767 states. [2020-10-27 18:57:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 3639 transitions. [2020-10-27 18:57:16,917 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 3639 transitions. Word has length 88 [2020-10-27 18:57:16,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:57:16,917 INFO L481 AbstractCegarLoop]: Abstraction has 2767 states and 3639 transitions. [2020-10-27 18:57:16,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:57:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 3639 transitions. [2020-10-27 18:57:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 18:57:16,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:57:16,920 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:57:16,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:57:16,920 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:57:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:57:16,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1597909014, now seen corresponding path program 1 times [2020-10-27 18:57:16,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:57:16,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315049110] [2020-10-27 18:57:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:57:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:16,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:17,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:17,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:17,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 18:57:17,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:57:17,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 946 [2020-10-27 18:57:17,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:17,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:57:17,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 18:57:17,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 18:57:17,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:57:18,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:57:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:18,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:18,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:18,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:57:18,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:18,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:57:18,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:18,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:57:18,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:18,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:57:18,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:18,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:57:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:18,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:18,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:18,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:57:18,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:18,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 18:57:18,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:18,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:57:18,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:18,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:57:18,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:57:18,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315049110] [2020-10-27 18:57:18,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:57:18,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:57:18,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143435973] [2020-10-27 18:57:18,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:57:18,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:57:18,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:57:18,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:57:18,281 INFO L87 Difference]: Start difference. First operand 2767 states and 3639 transitions. Second operand 5 states. [2020-10-27 18:57:34,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:57:34,081 INFO L93 Difference]: Finished difference Result 5552 states and 7662 transitions. [2020-10-27 18:57:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:57:34,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-10-27 18:57:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:57:34,107 INFO L225 Difference]: With dead ends: 5552 [2020-10-27 18:57:34,108 INFO L226 Difference]: Without dead ends: 3677 [2020-10-27 18:57:34,112 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 [2020-10-27 18:57:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2020-10-27 18:57:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 3664. [2020-10-27 18:57:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3664 states. [2020-10-27 18:57:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 4831 transitions. [2020-10-27 18:57:34,243 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 4831 transitions. Word has length 93 [2020-10-27 18:57:34,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:57:34,243 INFO L481 AbstractCegarLoop]: Abstraction has 3664 states and 4831 transitions. [2020-10-27 18:57:34,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:57:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 4831 transitions. [2020-10-27 18:57:34,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 18:57:34,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:57:34,252 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:57:34,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:57:34,252 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:57:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:57:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash 842067169, now seen corresponding path program 1 times [2020-10-27 18:57:34,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:57:34,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731491723] [2020-10-27 18:57:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:57:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:34,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:34,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:35,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:35,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 18:57:35,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:57:35,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-27 18:57:35,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:35,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:57:35,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-27 18:57:35,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 18:57:35,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:35,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:57:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:35,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:35,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:35,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:57:35,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:35,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:57:35,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:35,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:57:35,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:35,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:57:35,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:35,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:57:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:35,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:35,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:35,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 18:57:35,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:35,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 18:57:35,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:35,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:57:35,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:35,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 18:57:35,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:57:35,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731491723] [2020-10-27 18:57:35,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:57:35,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:57:35,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691006509] [2020-10-27 18:57:35,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:57:35,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:57:35,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:57:35,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:57:35,687 INFO L87 Difference]: Start difference. First operand 3664 states and 4831 transitions. Second operand 5 states. [2020-10-27 18:57:56,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:57:56,394 INFO L93 Difference]: Finished difference Result 9950 states and 13409 transitions. [2020-10-27 18:57:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:57:56,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-10-27 18:57:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:57:56,444 INFO L225 Difference]: With dead ends: 9950 [2020-10-27 18:57:56,445 INFO L226 Difference]: Without dead ends: 7175 [2020-10-27 18:57:56,454 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 [2020-10-27 18:57:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7175 states. [2020-10-27 18:57:56,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7175 to 5432. [2020-10-27 18:57:56,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5432 states. [2020-10-27 18:57:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 7498 transitions. [2020-10-27 18:57:56,670 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 7498 transitions. Word has length 116 [2020-10-27 18:57:56,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:57:56,672 INFO L481 AbstractCegarLoop]: Abstraction has 5432 states and 7498 transitions. [2020-10-27 18:57:56,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:57:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 7498 transitions. [2020-10-27 18:57:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 18:57:56,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:57:56,685 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 18:57:56,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:57:56,685 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:57:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:57:56,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2142172219, now seen corresponding path program 1 times [2020-10-27 18:57:56,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:57:56,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015986116] [2020-10-27 18:57:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:57:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:56,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:57,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:58,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:01,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:01,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 18:58:01,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:58:01,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 18:58:01,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:58:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 18:58:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 18:58:01,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:01,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:58:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:01,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:01,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:01,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:58:01,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:01,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:58:01,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:01,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:01,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:01,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:01,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:58:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:02,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:02,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:02,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:58:02,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:02,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 18:58:02,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:02,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:58:02,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:02,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:58:02,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:02,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 18:58:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:02,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:02,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:02,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:58:02,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:02,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-27 18:58:02,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:02,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:58:02,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:58:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 18:58:02,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:58:02,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015986116] [2020-10-27 18:58:02,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:58:02,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:58:02,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696972717] [2020-10-27 18:58:02,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:58:02,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:58:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:58:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:58:02,452 INFO L87 Difference]: Start difference. First operand 5432 states and 7498 transitions. Second operand 7 states. [2020-10-27 18:58:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:58:20,891 INFO L93 Difference]: Finished difference Result 12224 states and 17145 transitions. [2020-10-27 18:58:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:58:20,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2020-10-27 18:58:20,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:58:20,916 INFO L225 Difference]: With dead ends: 12224 [2020-10-27 18:58:20,916 INFO L226 Difference]: Without dead ends: 5019 [2020-10-27 18:58:20,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:58:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5019 states. [2020-10-27 18:58:21,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5019 to 4578. [2020-10-27 18:58:21,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4578 states. [2020-10-27 18:58:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 5749 transitions. [2020-10-27 18:58:21,056 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 5749 transitions. Word has length 163 [2020-10-27 18:58:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:58:21,056 INFO L481 AbstractCegarLoop]: Abstraction has 4578 states and 5749 transitions. [2020-10-27 18:58:21,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:58:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 5749 transitions. [2020-10-27 18:58:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-27 18:58:21,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:58:21,059 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 18:58:21,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:58:21,059 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:58:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:58:21,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1996862802, now seen corresponding path program 1 times [2020-10-27 18:58:21,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:58:21,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244590894] [2020-10-27 18:58:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:58:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:21,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:21,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:21,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:25,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:25,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-27 18:58:25,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:58:25,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4307 [2020-10-27 18:58:25,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:25,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:58:25,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-27 18:58:25,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 18:58:25,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:25,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:58:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:25,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:25,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:25,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:58:25,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:25,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:58:25,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:25,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:25,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:25,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:25,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:25,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:58:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:25,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:25,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:25,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:58:25,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:25,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 18:58:25,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:25,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:25,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:25,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:25,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:25,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:58:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:25,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:25,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:25,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:58:25,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:25,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-27 18:58:25,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:25,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:58:25,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:25,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:58:25,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 18:58:25,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244590894] [2020-10-27 18:58:25,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:58:25,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:58:25,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381394985] [2020-10-27 18:58:25,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:58:25,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:58:25,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:58:25,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:58:25,850 INFO L87 Difference]: Start difference. First operand 4578 states and 5749 transitions. Second operand 5 states. [2020-10-27 18:58:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:58:44,028 INFO L93 Difference]: Finished difference Result 12719 states and 16011 transitions. [2020-10-27 18:58:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:58:44,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2020-10-27 18:58:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:58:44,072 INFO L225 Difference]: With dead ends: 12719 [2020-10-27 18:58:44,073 INFO L226 Difference]: Without dead ends: 8147 [2020-10-27 18:58:44,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:58:44,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8147 states. [2020-10-27 18:58:44,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8147 to 7256. [2020-10-27 18:58:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7256 states. [2020-10-27 18:58:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 9211 transitions. [2020-10-27 18:58:44,286 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 9211 transitions. Word has length 176 [2020-10-27 18:58:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:58:44,287 INFO L481 AbstractCegarLoop]: Abstraction has 7256 states and 9211 transitions. [2020-10-27 18:58:44,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:58:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 9211 transitions. [2020-10-27 18:58:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-27 18:58:44,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:58:44,291 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 18:58:44,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:58:44,291 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:58:44,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:58:44,292 INFO L82 PathProgramCache]: Analyzing trace with hash 540886792, now seen corresponding path program 1 times [2020-10-27 18:58:44,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:58:44,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474637784] [2020-10-27 18:58:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:58:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:44,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:44,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:44,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:49,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:49,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:58:49,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:58:49,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4895 [2020-10-27 18:58:49,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:58:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-27 18:58:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 18:58:49,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:49,434 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:58:49,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:58:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:49,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:49,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:49,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:58:49,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:49,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:58:49,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:49,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:49,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:49,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:49,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:49,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:58:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:49,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:49,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:49,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:58:49,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:49,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 18:58:49,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:49,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:49,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:49,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:49,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:58:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:49,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:49,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:49,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:58:49,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:49,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 18:58:49,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:58:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 18:58:49,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-27 18:58:49,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474637784] [2020-10-27 18:58:49,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:58:49,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:58:49,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228625135] [2020-10-27 18:58:49,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:58:49,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:58:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:58:49,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:58:49,788 INFO L87 Difference]: Start difference. First operand 7256 states and 9211 transitions. Second operand 5 states. [2020-10-27 18:58:49,952 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 18:59:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:59:08,922 INFO L93 Difference]: Finished difference Result 17605 states and 22752 transitions. [2020-10-27 18:59:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:59:08,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2020-10-27 18:59:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:59:08,963 INFO L225 Difference]: With dead ends: 17605 [2020-10-27 18:59:08,963 INFO L226 Difference]: Without dead ends: 10355 [2020-10-27 18:59:08,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:59:08,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10355 states. [2020-10-27 18:59:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10355 to 9475. [2020-10-27 18:59:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9475 states. [2020-10-27 18:59:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9475 states to 9475 states and 12107 transitions. [2020-10-27 18:59:09,270 INFO L78 Accepts]: Start accepts. Automaton has 9475 states and 12107 transitions. Word has length 187 [2020-10-27 18:59:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:59:09,271 INFO L481 AbstractCegarLoop]: Abstraction has 9475 states and 12107 transitions. [2020-10-27 18:59:09,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:59:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 9475 states and 12107 transitions. [2020-10-27 18:59:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-27 18:59:09,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:59:09,276 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 18:59:09,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:59:09,276 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:59:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:59:09,277 INFO L82 PathProgramCache]: Analyzing trace with hash -507305169, now seen corresponding path program 1 times [2020-10-27 18:59:09,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:59:09,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550828521] [2020-10-27 18:59:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:59:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:09,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:09,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:10,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:11,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:11,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-27 18:59:11,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:59:11,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2050 [2020-10-27 18:59:11,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:11,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:59:11,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 220 [2020-10-27 18:59:11,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 18:59:11,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:11,596 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:59:11,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:59:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:11,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:11,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:11,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:59:11,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:11,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:59:11,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:11,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:11,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:11,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:11,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:11,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:59:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:11,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:11,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:11,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:59:11,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:11,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 18:59:11,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:11,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:11,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:59:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:11,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:11,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:11,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 18:59:11,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:11,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 18:59:11,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:11,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:59:11,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:11,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 18:59:11,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 18:59:12,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550828521] [2020-10-27 18:59:12,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:59:12,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:59:12,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98498302] [2020-10-27 18:59:12,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:59:12,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:59:12,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:59:12,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:59:12,034 INFO L87 Difference]: Start difference. First operand 9475 states and 12107 transitions. Second operand 5 states. [2020-10-27 18:59:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:59:27,788 INFO L93 Difference]: Finished difference Result 23350 states and 30558 transitions. [2020-10-27 18:59:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:59:27,795 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2020-10-27 18:59:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:59:27,843 INFO L225 Difference]: With dead ends: 23350 [2020-10-27 18:59:27,843 INFO L226 Difference]: Without dead ends: 12988 [2020-10-27 18:59:27,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:59:27,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12988 states. [2020-10-27 18:59:28,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12988 to 12981. [2020-10-27 18:59:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12981 states. [2020-10-27 18:59:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12981 states to 12981 states and 16490 transitions. [2020-10-27 18:59:28,188 INFO L78 Accepts]: Start accepts. Automaton has 12981 states and 16490 transitions. Word has length 222 [2020-10-27 18:59:28,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:59:28,189 INFO L481 AbstractCegarLoop]: Abstraction has 12981 states and 16490 transitions. [2020-10-27 18:59:28,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:59:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 12981 states and 16490 transitions. [2020-10-27 18:59:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-27 18:59:28,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:59:28,195 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:59:28,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:59:28,196 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:59:28,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:59:28,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1276402272, now seen corresponding path program 1 times [2020-10-27 18:59:28,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:59:28,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140468538] [2020-10-27 18:59:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:59:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:28,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:28,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:28,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:31,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:31,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-27 18:59:31,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:59:31,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3417 [2020-10-27 18:59:31,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:31,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:59:31,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 262 [2020-10-27 18:59:31,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 18:59:31,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:31,862 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:59:31,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:59:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:31,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:31,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:31,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:59:31,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:31,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:59:31,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:31,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:31,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:59:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:31,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:31,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:31,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:59:31,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:31,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 18:59:31,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:31,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:31,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:31,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:31,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:31,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:59:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:32,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:32,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:32,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 18:59:32,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:32,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 18:59:32,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:32,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:32,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:32,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:32,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:32,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-10-27 18:59:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:32,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:32,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:32,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 18:59:32,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:32,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 18:59:32,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:32,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:59:32,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:32,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 18:59:32,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2020-10-27 18:59:32,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140468538] [2020-10-27 18:59:32,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:59:32,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:59:32,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071366246] [2020-10-27 18:59:32,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:59:32,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:59:32,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:59:32,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:59:32,306 INFO L87 Difference]: Start difference. First operand 12981 states and 16490 transitions. Second operand 5 states. [2020-10-27 18:59:32,492 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 18:59:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:59:48,214 INFO L93 Difference]: Finished difference Result 29905 states and 38433 transitions. [2020-10-27 18:59:48,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:59:48,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 262 [2020-10-27 18:59:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:59:48,287 INFO L225 Difference]: With dead ends: 29905 [2020-10-27 18:59:48,287 INFO L226 Difference]: Without dead ends: 16930 [2020-10-27 18:59:48,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:59:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16930 states. [2020-10-27 18:59:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16930 to 16051. [2020-10-27 18:59:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16051 states. [2020-10-27 18:59:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16051 states to 16051 states and 20425 transitions. [2020-10-27 18:59:48,763 INFO L78 Accepts]: Start accepts. Automaton has 16051 states and 20425 transitions. Word has length 262 [2020-10-27 18:59:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:59:48,764 INFO L481 AbstractCegarLoop]: Abstraction has 16051 states and 20425 transitions. [2020-10-27 18:59:48,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:59:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 16051 states and 20425 transitions. [2020-10-27 18:59:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-27 18:59:48,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:59:48,772 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:59:48,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:59:48,772 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:59:48,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:59:48,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1457514974, now seen corresponding path program 1 times [2020-10-27 18:59:48,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:59:48,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49267311] [2020-10-27 18:59:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:59:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:48,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:49,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:49,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:51,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:51,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:53,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:53,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-27 18:59:53,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:59:53,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 18:59:53,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:53,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:59:53,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 278 [2020-10-27 18:59:53,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 18:59:53,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:54,127 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:59:54,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:59:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:54,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:54,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:54,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:59:54,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:54,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:59:54,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:54,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:54,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:54,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:54,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:54,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:59:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:54,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:54,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:54,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:59:54,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:54,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 18:59:54,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:54,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:54,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:54,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:54,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:54,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:59:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:54,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:54,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:54,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:59:54,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:54,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 18:59:54,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:54,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:54,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-10-27 18:59:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:54,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:54,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:54,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 18:59:54,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:54,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 18:59:54,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:54,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:59:54,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:54,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 18:59:54,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-27 18:59:54,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49267311] [2020-10-27 18:59:54,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:59:54,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:59:54,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013144104] [2020-10-27 18:59:54,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:59:54,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:59:54,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:59:54,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:59:54,583 INFO L87 Difference]: Start difference. First operand 16051 states and 20425 transitions. Second operand 5 states. [2020-10-27 18:59:54,725 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66