/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=SHALLOWEST --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/Problem13_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:11:48,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:11:48,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:11:48,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:11:48,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:11:48,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:11:48,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:11:48,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:11:48,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:11:48,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:11:48,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:11:48,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:11:48,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:11:48,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:11:48,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:11:48,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:11:48,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:11:48,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:11:48,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:11:48,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:11:48,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:11:48,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:11:48,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:11:48,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:11:48,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:11:48,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:11:48,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:11:48,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:11:48,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:11:48,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:11:48,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:11:48,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:11:48,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:11:48,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:11:48,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:11:48,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:11:48,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:11:48,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:11:48,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:11:48,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:11:48,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:11:48,196 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 [2020-10-26 23:11:48,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:11:48,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:11:48,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:11:48,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:11:48,231 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:11:48,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:11:48,232 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:11:48,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:11:48,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:11:48,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:11:48,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:11:48,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:11:48,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:11:48,234 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:11:48,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:11:48,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:11:48,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:11:48,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:11:48,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:11:48,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:11:48,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:11:48,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:11:48,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:11:48,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:11:48,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:11:48,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:11:48,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:11:48,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:11:48,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:11:48,238 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:11:48,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:11:48,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:11:48,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:11:48,805 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:11:48,806 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:11:48,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label34.c [2020-10-26 23:11:48,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36a2e6708/58c19c35dcca4e03b2ff71f56427abcf/FLAG9d8d3eef2 [2020-10-26 23:11:50,330 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:11:50,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label34.c [2020-10-26 23:11:50,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36a2e6708/58c19c35dcca4e03b2ff71f56427abcf/FLAG9d8d3eef2 [2020-10-26 23:11:50,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36a2e6708/58c19c35dcca4e03b2ff71f56427abcf [2020-10-26 23:11:50,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:11:50,590 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:11:50,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:11:50,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:11:50,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:11:50,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:11:50" (1/1) ... [2020-10-26 23:11:50,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@847d14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:50, skipping insertion in model container [2020-10-26 23:11:50,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:11:50" (1/1) ... [2020-10-26 23:11:50,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:11:50,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:11:52,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:11:52,858 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:11:53,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:11:53,985 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:11:53,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:53 WrapperNode [2020-10-26 23:11:53,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:11:53,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:11:53,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:11:53,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:11:54,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:53" (1/1) ... [2020-10-26 23:11:54,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:53" (1/1) ... [2020-10-26 23:11:54,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:53" (1/1) ... [2020-10-26 23:11:54,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:53" (1/1) ... [2020-10-26 23:11:54,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:53" (1/1) ... [2020-10-26 23:11:54,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:53" (1/1) ... [2020-10-26 23:11:54,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:53" (1/1) ... [2020-10-26 23:11:54,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:11:54,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:11:54,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:11:54,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:11:54,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:53" (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 [2020-10-26 23:11:54,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:11:54,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:11:54,716 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:11:54,716 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:11:54,716 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:11:54,716 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:11:54,716 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:11:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:11:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:11:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:11:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:11:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:11:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:11:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:11:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:11:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:11:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:11:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:11:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:11:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:11:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:11:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:11:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:11:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:11:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:12:05,672 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:12:05,672 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:12:05,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:12:05 BoogieIcfgContainer [2020-10-26 23:12:05,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:12:05,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:12:05,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:12:05,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:12:05,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:11:50" (1/3) ... [2020-10-26 23:12:05,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbaaab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:12:05, skipping insertion in model container [2020-10-26 23:12:05,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:53" (2/3) ... [2020-10-26 23:12:05,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbaaab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:12:05, skipping insertion in model container [2020-10-26 23:12:05,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:12:05" (3/3) ... [2020-10-26 23:12:05,694 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label34.c [2020-10-26 23:12:05,709 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:12:05,717 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:12:05,734 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:12:05,788 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:12:05,788 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:12:05,788 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:12:05,788 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:12:05,789 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:12:05,789 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:12:05,789 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:12:05,789 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:12:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:12:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 23:12:05,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:05,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:12:05,860 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:05,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1061433682, now seen corresponding path program 1 times [2020-10-26 23:12:05,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:05,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095828100] [2020-10-26 23:12:05,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:06,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:06,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:06,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:12:06,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:06,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-26 23:12:06,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:06,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:06,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:06,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 23:12:06,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:12:07,060 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:12:07,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:07,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:07,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:07,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:07,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:07,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 23:12:07,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:07,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:07,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:07,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:07,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:12:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:12:07,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095828100] [2020-10-26 23:12:07,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:12:07,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:12:07,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781474910] [2020-10-26 23:12:07,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:12:07,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:07,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:12:07,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:12:07,202 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:12:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:12:24,405 INFO L93 Difference]: Finished difference Result 3209 states and 5919 transitions. [2020-10-26 23:12:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:12:24,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-26 23:12:24,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:12:24,462 INFO L225 Difference]: With dead ends: 3209 [2020-10-26 23:12:24,462 INFO L226 Difference]: Without dead ends: 2007 [2020-10-26 23:12:24,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:12:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2020-10-26 23:12:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1921. [2020-10-26 23:12:24,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1921 states. [2020-10-26 23:12:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 3312 transitions. [2020-10-26 23:12:24,698 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 3312 transitions. Word has length 63 [2020-10-26 23:12:24,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:12:24,699 INFO L481 AbstractCegarLoop]: Abstraction has 1921 states and 3312 transitions. [2020-10-26 23:12:24,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:12:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 3312 transitions. [2020-10-26 23:12:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-26 23:12:24,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:24,715 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:12:24,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:12:24,716 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:24,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:24,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1429707475, now seen corresponding path program 1 times [2020-10-26 23:12:24,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:24,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959337609] [2020-10-26 23:12:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:24,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:25,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:26,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:27,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:27,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 23:12:27,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:12:27,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2543 [2020-10-26 23:12:27,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:27,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:27,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:27,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:12:27,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:12:27,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:27,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:27,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:27,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:27,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:27,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:12:27,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:27,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:27,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:27,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:27,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:12:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:27,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:27,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:27,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:12:27,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:27,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-26 23:12:27,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:27,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:27,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:27,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:12:27,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:12:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:12:28,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959337609] [2020-10-26 23:12:28,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:12:28,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 23:12:28,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121826741] [2020-10-26 23:12:28,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:12:28,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:28,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:12:28,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:12:28,067 INFO L87 Difference]: Start difference. First operand 1921 states and 3312 transitions. Second operand 8 states. [2020-10-26 23:12:55,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:12:55,565 INFO L93 Difference]: Finished difference Result 7342 states and 12869 transitions. [2020-10-26 23:12:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:12:55,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 132 [2020-10-26 23:12:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:12:55,607 INFO L225 Difference]: With dead ends: 7342 [2020-10-26 23:12:55,607 INFO L226 Difference]: Without dead ends: 5427 [2020-10-26 23:12:55,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:12:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5427 states. [2020-10-26 23:12:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5427 to 5378. [2020-10-26 23:12:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5378 states. [2020-10-26 23:12:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5378 states to 5378 states and 8227 transitions. [2020-10-26 23:12:55,874 INFO L78 Accepts]: Start accepts. Automaton has 5378 states and 8227 transitions. Word has length 132 [2020-10-26 23:12:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:12:55,878 INFO L481 AbstractCegarLoop]: Abstraction has 5378 states and 8227 transitions. [2020-10-26 23:12:55,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:12:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 5378 states and 8227 transitions. [2020-10-26 23:12:55,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-26 23:12:55,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:55,890 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:12:55,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:12:55,891 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:55,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1306176975, now seen corresponding path program 1 times [2020-10-26 23:12:55,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:55,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799597568] [2020-10-26 23:12:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:55,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:56,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:57,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:57,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 23:12:57,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:12:57,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1088 [2020-10-26 23:12:57,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:57,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:57,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:57,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:12:57,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:57,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:57,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:57,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:57,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:57,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:57,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:12:57,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:57,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:57,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:57,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:57,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:12:57,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:12:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:57,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:57,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:57,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 23:12:57,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:57,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-26 23:12:57,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:57,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:57,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:57,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 23:12:57,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:12:57,618 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 6 [2020-10-26 23:12:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:12:57,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799597568] [2020-10-26 23:12:57,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:12:57,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:12:57,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036268583] [2020-10-26 23:12:57,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:12:57,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:57,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:12:57,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:12:57,704 INFO L87 Difference]: Start difference. First operand 5378 states and 8227 transitions. Second operand 7 states. [2020-10-26 23:13:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:26,376 INFO L93 Difference]: Finished difference Result 16027 states and 24920 transitions. [2020-10-26 23:13:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:13:26,378 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 134 [2020-10-26 23:13:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:26,444 INFO L225 Difference]: With dead ends: 16027 [2020-10-26 23:13:26,444 INFO L226 Difference]: Without dead ends: 10655 [2020-10-26 23:13:26,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:13:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10655 states. [2020-10-26 23:13:26,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10655 to 10440. [2020-10-26 23:13:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10440 states. [2020-10-26 23:13:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 14155 transitions. [2020-10-26 23:13:26,810 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 14155 transitions. Word has length 134 [2020-10-26 23:13:26,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:26,810 INFO L481 AbstractCegarLoop]: Abstraction has 10440 states and 14155 transitions. [2020-10-26 23:13:26,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:13:26,811 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 14155 transitions. [2020-10-26 23:13:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-26 23:13:26,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:26,813 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:13:26,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:13:26,814 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash -368827651, now seen corresponding path program 1 times [2020-10-26 23:13:26,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:26,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605409591] [2020-10-26 23:13:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:26,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:27,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:27,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:28,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:28,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 23:13:28,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:13:28,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1402 [2020-10-26 23:13:28,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:13:28,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:28,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-26 23:13:28,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:28,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:28,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:28,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:28,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:28,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:28,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:13:28,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:28,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:28,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:28,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:28,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:28,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:28,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:13:28,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:13:28,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-26 23:13:28,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:13:28,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:13:28,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605409591] [2020-10-26 23:13:28,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:13:28,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:13:28,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848782638] [2020-10-26 23:13:28,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:13:28,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:28,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:13:28,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:13:28,921 INFO L87 Difference]: Start difference. First operand 10440 states and 14155 transitions. Second operand 6 states. [2020-10-26 23:13:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:53,722 INFO L93 Difference]: Finished difference Result 28706 states and 40583 transitions. [2020-10-26 23:13:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:13:53,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2020-10-26 23:13:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:53,813 INFO L225 Difference]: With dead ends: 28706 [2020-10-26 23:13:53,814 INFO L226 Difference]: Without dead ends: 18272 [2020-10-26 23:13:53,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:13:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18272 states. [2020-10-26 23:13:54,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18272 to 18175. [2020-10-26 23:13:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18175 states. [2020-10-26 23:13:54,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18175 states to 18175 states and 23562 transitions. [2020-10-26 23:13:54,385 INFO L78 Accepts]: Start accepts. Automaton has 18175 states and 23562 transitions. Word has length 140 [2020-10-26 23:13:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:54,386 INFO L481 AbstractCegarLoop]: Abstraction has 18175 states and 23562 transitions. [2020-10-26 23:13:54,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:13:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 18175 states and 23562 transitions. [2020-10-26 23:13:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-26 23:13:54,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:54,391 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 23:13:54,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:13:54,392 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:54,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1562438482, now seen corresponding path program 1 times [2020-10-26 23:13:54,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:54,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669973748] [2020-10-26 23:13:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:54,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:54,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:54,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:59,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:59,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-26 23:13:59,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:13:59,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4928 [2020-10-26 23:13:59,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:59,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:13:59,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:59,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:13:59,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:59,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:59,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:59,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:59,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:59,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:59,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 23:13:59,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:59,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:59,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:59,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:59,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:59,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:59,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:59,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:13:59,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:59,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-26 23:13:59,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:59,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:59,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:59,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:13:59,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:59,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:13:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:59,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:00,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:00,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:14:00,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:00,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 23:14:00,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:00,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:14:00,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-26 23:14:00,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:14:00,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:14:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 110 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:14:00,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669973748] [2020-10-26 23:14:00,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:14:00,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:14:00,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145203245] [2020-10-26 23:14:00,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:14:00,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:14:00,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:14:00,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:14:00,176 INFO L87 Difference]: Start difference. First operand 18175 states and 23562 transitions. Second operand 7 states. [2020-10-26 23:14:00,353 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 23:14:02,463 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 23:14:24,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:24,573 INFO L93 Difference]: Finished difference Result 35855 states and 46995 transitions. [2020-10-26 23:14:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:14:24,577 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 233 [2020-10-26 23:14:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:24,652 INFO L225 Difference]: With dead ends: 35855 [2020-10-26 23:14:24,652 INFO L226 Difference]: Without dead ends: 18489 [2020-10-26 23:14:24,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:14:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18489 states. [2020-10-26 23:14:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18489 to 18295. [2020-10-26 23:14:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18295 states. [2020-10-26 23:14:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18295 states to 18295 states and 23785 transitions. [2020-10-26 23:14:25,153 INFO L78 Accepts]: Start accepts. Automaton has 18295 states and 23785 transitions. Word has length 233 [2020-10-26 23:14:25,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:25,154 INFO L481 AbstractCegarLoop]: Abstraction has 18295 states and 23785 transitions. [2020-10-26 23:14:25,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:14:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 18295 states and 23785 transitions. [2020-10-26 23:14:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-26 23:14:25,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:25,159 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 23:14:25,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:14:25,160 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:25,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1043617703, now seen corresponding path program 1 times [2020-10-26 23:14:25,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:25,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49184491] [2020-10-26 23:14:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:25,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:25,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:26,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:26,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:26,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-26 23:14:26,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:14:26,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1509 [2020-10-26 23:14:26,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:26,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:26,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:14:26,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:14:26,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:26,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:14:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:26,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:26,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:26,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:14:26,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:26,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:14:26,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:26,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:14:26,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:26,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:14:26,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:26,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:14:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:26,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:27,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:27,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:14:27,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:27,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 23:14:27,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:27,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:14:27,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:27,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:14:27,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:27,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:14:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:27,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:27,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:14:27,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:27,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-26 23:14:27,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:27,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:27,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:14:27,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:14:27,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 184 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:14:27,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49184491] [2020-10-26 23:14:27,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:14:27,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:14:27,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013279714] [2020-10-26 23:14:27,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:14:27,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:14:27,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:14:27,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:14:27,535 INFO L87 Difference]: Start difference. First operand 18295 states and 23785 transitions. Second operand 7 states. [2020-10-26 23:14:27,707 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:14:32,633 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:15:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:15:05,584 INFO L93 Difference]: Finished difference Result 44768 states and 61864 transitions. [2020-10-26 23:15:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:15:05,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 240 [2020-10-26 23:15:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:15:05,747 INFO L225 Difference]: With dead ends: 44768 [2020-10-26 23:15:05,747 INFO L226 Difference]: Without dead ends: 27282 [2020-10-26 23:15:05,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:15:05,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27282 states. [2020-10-26 23:15:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27282 to 26998. [2020-10-26 23:15:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26998 states. [2020-10-26 23:15:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26998 states to 26998 states and 35828 transitions. [2020-10-26 23:15:06,791 INFO L78 Accepts]: Start accepts. Automaton has 26998 states and 35828 transitions. Word has length 240 [2020-10-26 23:15:06,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:15:06,793 INFO L481 AbstractCegarLoop]: Abstraction has 26998 states and 35828 transitions. [2020-10-26 23:15:06,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:15:06,793 INFO L276 IsEmpty]: Start isEmpty. Operand 26998 states and 35828 transitions. [2020-10-26 23:15:06,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-10-26 23:15:06,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:15:06,801 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:15:06,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:15:06,802 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:15:06,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:15:06,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1984052260, now seen corresponding path program 1 times [2020-10-26 23:15:06,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:15:06,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814489986] [2020-10-26 23:15:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:15:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:06,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:07,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:07,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:08,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:10,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:10,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-26 23:15:10,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:15:10,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4074 [2020-10-26 23:15:10,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:15:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:15:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 227 [2020-10-26 23:15:10,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:11,134 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:15:11,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:15:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:11,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:11,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:11,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:15:11,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:11,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:15:11,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:11,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:15:11,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:15:11,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:15:11,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:11,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:15:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:11,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:11,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:11,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:11,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:15:11,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:15:11,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-26 23:15:11,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:11,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:11,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:11,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:15:11,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:11,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:15:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:11,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:11,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:11,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 23:15:11,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:11,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 23:15:11,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:11,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:11,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:11,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 23:15:11,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-26 23:15:12,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814489986] [2020-10-26 23:15:12,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:15:12,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:15:12,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328881965] [2020-10-26 23:15:12,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:15:12,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:15:12,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:15:12,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:15:12,209 INFO L87 Difference]: Start difference. First operand 26998 states and 35828 transitions. Second operand 7 states. [2020-10-26 23:15:15,233 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 67