/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/Problem19_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:17:21,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:17:22,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:17:22,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:17:22,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:17:22,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:17:22,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:17:22,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:17:22,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:17:22,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:17:22,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:17:22,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:17:22,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:17:22,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:17:22,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:17:22,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:17:22,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:17:22,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:17:22,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:17:22,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:17:22,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:17:22,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:17:22,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:17:22,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:17:22,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:17:22,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:17:22,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:17:22,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:17:22,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:17:22,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:17:22,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:17:22,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:17:22,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:17:22,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:17:22,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:17:22,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:17:22,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:17:22,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:17:22,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:17:22,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:17:22,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:17:22,198 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 [2020-10-28 14:17:22,254 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:17:22,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:17:22,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:17:22,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:17:22,262 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:17:22,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:17:22,263 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:17:22,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:17:22,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:17:22,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:17:22,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:17:22,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:17:22,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:17:22,267 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:17:22,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:17:22,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:17:22,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:17:22,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:17:22,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:17:22,269 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:17:22,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:17:22,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:17:22,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:17:22,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:17:22,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:17:22,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:17:22,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:17:22,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:17:22,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:17:22,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:17:22,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:17:22,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:17:22,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:17:22,728 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:17:22,729 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:17:22,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label55.c [2020-10-28 14:17:22,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa85b3c15/d39651d22a924cc38b38281f34abb0b0/FLAGf7a6bc413 [2020-10-28 14:17:24,134 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:17:24,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label55.c [2020-10-28 14:17:24,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa85b3c15/d39651d22a924cc38b38281f34abb0b0/FLAGf7a6bc413 [2020-10-28 14:17:24,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa85b3c15/d39651d22a924cc38b38281f34abb0b0 [2020-10-28 14:17:24,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:17:24,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:17:24,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:17:24,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:17:24,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:17:24,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:17:24" (1/1) ... [2020-10-28 14:17:24,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e3de5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:17:24, skipping insertion in model container [2020-10-28 14:17:24,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:17:24" (1/1) ... [2020-10-28 14:17:24,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:17:24,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:17:27,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:17:27,019 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:17:28,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:17:28,184 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:17:28,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:17:28 WrapperNode [2020-10-28 14:17:28,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:17:28,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:17:28,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:17:28,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:17:28,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:17:28" (1/1) ... [2020-10-28 14:17:28,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:17:28" (1/1) ... [2020-10-28 14:17:28,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:17:28" (1/1) ... [2020-10-28 14:17:28,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:17:28" (1/1) ... [2020-10-28 14:17:28,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:17:28" (1/1) ... [2020-10-28 14:17:28,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:17:28" (1/1) ... [2020-10-28 14:17:28,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:17:28" (1/1) ... [2020-10-28 14:17:28,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:17:28,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:17:28,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:17:28,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:17:28,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:17:28" (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 [2020-10-28 14:17:29,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:17:29,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:17:29,006 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:17:29,006 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:17:29,006 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:17:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:17:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:17:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:17:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:17:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:17:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:17:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:17:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:17:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:17:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:17:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:17:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:17:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:17:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:17:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:17:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:17:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:17:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:17:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:17:29,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:17:29,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:17:29,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:17:29,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:17:29,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:17:44,534 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:17:44,534 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:17:44,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:17:44 BoogieIcfgContainer [2020-10-28 14:17:44,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:17:44,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:17:44,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:17:44,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:17:44,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:17:24" (1/3) ... [2020-10-28 14:17:44,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eafe442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:17:44, skipping insertion in model container [2020-10-28 14:17:44,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:17:28" (2/3) ... [2020-10-28 14:17:44,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eafe442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:17:44, skipping insertion in model container [2020-10-28 14:17:44,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:17:44" (3/3) ... [2020-10-28 14:17:44,554 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label55.c [2020-10-28 14:17:44,568 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:17:44,576 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:17:44,592 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:17:44,648 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:17:44,649 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:17:44,649 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:17:44,649 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:17:44,649 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:17:44,649 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:17:44,649 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:17:44,649 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:17:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:17:44,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:17:44,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:17:44,722 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] [2020-10-28 14:17:44,722 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:17:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:17:44,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2117600498, now seen corresponding path program 1 times [2020-10-28 14:17:44,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:17:44,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29525384] [2020-10-28 14:17:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:17:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:17:45,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:45,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:17:45,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:17:45,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:17:45,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-28 14:17:45,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:17:45,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:17:45,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:17:45,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:17:45,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:17:45,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:17:45,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:17:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:17:45,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:45,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:17:45,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:17:45,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:17:45,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 14:17:45,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:17:45,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:17:45,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:17:45,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:17:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:17:45,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:17:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:17:45,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29525384] [2020-10-28 14:17:45,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:17:45,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:17:45,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768900863] [2020-10-28 14:17:45,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:17:45,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:17:45,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:17:45,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:17:45,888 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:18:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:18:18,242 INFO L93 Difference]: Finished difference Result 5062 states and 9524 transitions. [2020-10-28 14:18:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:18:18,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 14:18:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:18:18,289 INFO L225 Difference]: With dead ends: 5062 [2020-10-28 14:18:18,289 INFO L226 Difference]: Without dead ends: 3201 [2020-10-28 14:18:18,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:18:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2020-10-28 14:18:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 3153. [2020-10-28 14:18:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3153 states. [2020-10-28 14:18:18,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 5020 transitions. [2020-10-28 14:18:18,540 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 5020 transitions. Word has length 21 [2020-10-28 14:18:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:18:18,541 INFO L481 AbstractCegarLoop]: Abstraction has 3153 states and 5020 transitions. [2020-10-28 14:18:18,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:18:18,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 5020 transitions. [2020-10-28 14:18:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 14:18:18,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:18:18,553 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:18:18,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:18:18,554 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:18:18,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:18:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash -903930720, now seen corresponding path program 1 times [2020-10-28 14:18:18,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:18:18,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480112466] [2020-10-28 14:18:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:18:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:18,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:18,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:18,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:19,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:20,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:20,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 14:18:20,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:18:20,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1881 [2020-10-28 14:18:20,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:20,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:20,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:18:20,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 14:18:20,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:18:20,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:18:20,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:18:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:20,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:20,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:20,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:18:20,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:18:20,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:18:20,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:20,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:20,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:18:20,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:18:20,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:18:20,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:20,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:18:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:20,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:20,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:20,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:18:20,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:18:20,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-28 14:18:20,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:20,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:20,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:18:20,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-28 14:18:20,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:18:20,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:18:20,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480112466] [2020-10-28 14:18:20,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:18:20,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:18:20,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472561144] [2020-10-28 14:18:20,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:18:20,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:18:20,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:18:20,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:18:20,885 INFO L87 Difference]: Start difference. First operand 3153 states and 5020 transitions. Second operand 5 states. [2020-10-28 14:18:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:18:54,505 INFO L93 Difference]: Finished difference Result 9267 states and 14844 transitions. [2020-10-28 14:18:54,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:18:54,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2020-10-28 14:18:54,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:18:54,545 INFO L225 Difference]: With dead ends: 9267 [2020-10-28 14:18:54,545 INFO L226 Difference]: Without dead ends: 6120 [2020-10-28 14:18:54,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:18:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6120 states. [2020-10-28 14:18:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6120 to 6054. [2020-10-28 14:18:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6054 states. [2020-10-28 14:18:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6054 states to 6054 states and 9061 transitions. [2020-10-28 14:18:54,743 INFO L78 Accepts]: Start accepts. Automaton has 6054 states and 9061 transitions. Word has length 92 [2020-10-28 14:18:54,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:18:54,744 INFO L481 AbstractCegarLoop]: Abstraction has 6054 states and 9061 transitions. [2020-10-28 14:18:54,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:18:54,745 INFO L276 IsEmpty]: Start isEmpty. Operand 6054 states and 9061 transitions. [2020-10-28 14:18:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 14:18:54,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:18:54,747 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:18:54,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:18:54,748 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:18:54,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:18:54,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1721579170, now seen corresponding path program 1 times [2020-10-28 14:18:54,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:18:54,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503609452] [2020-10-28 14:18:54,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:18:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:54,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:54,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:55,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:55,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 14:18:55,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:18:55,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-10-28 14:18:55,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:55,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:55,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:18:55,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:18:55,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 14:18:55,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:55,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:18:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:55,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:55,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:55,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:18:55,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:18:55,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 14:18:55,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:55,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:55,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:18:55,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:18:55,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:18:55,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:55,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:18:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:55,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:55,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:55,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:18:55,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:18:55,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 14:18:55,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:55,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:55,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:18:55,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:18:55,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 14:18:55,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:18:56,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503609452] [2020-10-28 14:18:56,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:18:56,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:18:56,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611073225] [2020-10-28 14:18:56,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:18:56,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:18:56,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:18:56,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:18:56,066 INFO L87 Difference]: Start difference. First operand 6054 states and 9061 transitions. Second operand 7 states. [2020-10-28 14:20:00,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:20:00,977 INFO L93 Difference]: Finished difference Result 18266 states and 27738 transitions. [2020-10-28 14:20:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:20:00,980 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-28 14:20:00,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:20:01,074 INFO L225 Difference]: With dead ends: 18266 [2020-10-28 14:20:01,077 INFO L226 Difference]: Without dead ends: 12218 [2020-10-28 14:20:01,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:20:01,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12218 states. [2020-10-28 14:20:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12218 to 12031. [2020-10-28 14:20:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12031 states. [2020-10-28 14:20:01,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12031 states to 12031 states and 16143 transitions. [2020-10-28 14:20:01,604 INFO L78 Accepts]: Start accepts. Automaton has 12031 states and 16143 transitions. Word has length 92 [2020-10-28 14:20:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:20:01,607 INFO L481 AbstractCegarLoop]: Abstraction has 12031 states and 16143 transitions. [2020-10-28 14:20:01,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:20:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 12031 states and 16143 transitions. [2020-10-28 14:20:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 14:20:01,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:20:01,624 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:20:01,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:20:01,626 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:20:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:20:01,627 INFO L82 PathProgramCache]: Analyzing trace with hash 2087448585, now seen corresponding path program 1 times [2020-10-28 14:20:01,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:20:01,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905091739] [2020-10-28 14:20:01,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:20:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:20:01,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:20:01,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:20:02,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:20:03,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:20:03,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 14:20:03,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:20:03,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1413 [2020-10-28 14:20:03,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:20:03,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:20:03,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:20:03,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:20:03,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 14:20:03,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:20:03,296 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:20:03,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:20:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:20:03,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:20:03,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:20:03,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:20:03,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:20:03,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 14:20:03,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:20:03,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:20:03,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:20:03,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:20:03,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:20:03,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:20:03,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:20:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:20:03,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:20:03,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:20:03,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:20:03,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:20:03,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 14:20:03,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:20:03,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:20:03,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:20:03,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:20:03,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 14:20:03,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:20:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:20:03,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905091739] [2020-10-28 14:20:03,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:20:03,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:20:03,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191970097] [2020-10-28 14:20:03,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:20:03,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:20:03,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:20:03,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:20:03,749 INFO L87 Difference]: Start difference. First operand 12031 states and 16143 transitions. Second operand 7 states. [2020-10-28 14:20:03,899 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:21:08,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:21:08,133 INFO L93 Difference]: Finished difference Result 30376 states and 40973 transitions. [2020-10-28 14:21:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:21:08,135 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-28 14:21:08,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:21:08,220 INFO L225 Difference]: With dead ends: 30376 [2020-10-28 14:21:08,220 INFO L226 Difference]: Without dead ends: 18351 [2020-10-28 14:21:08,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:21:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18351 states. [2020-10-28 14:21:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18351 to 18154. [2020-10-28 14:21:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18154 states. [2020-10-28 14:21:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18154 states to 18154 states and 23785 transitions. [2020-10-28 14:21:08,799 INFO L78 Accepts]: Start accepts. Automaton has 18154 states and 23785 transitions. Word has length 94 [2020-10-28 14:21:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:21:08,800 INFO L481 AbstractCegarLoop]: Abstraction has 18154 states and 23785 transitions. [2020-10-28 14:21:08,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:21:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 18154 states and 23785 transitions. [2020-10-28 14:21:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 14:21:08,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:21:08,805 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:21:08,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:21:08,805 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:21:08,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:21:08,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1206394955, now seen corresponding path program 1 times [2020-10-28 14:21:08,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:21:08,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197524764] [2020-10-28 14:21:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:21:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:21:08,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:21:08,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:21:09,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:21:09,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:21:09,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 14:21:09,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:21:09,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-28 14:21:09,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:21:09,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:21:09,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:21:09,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-28 14:21:09,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:21:09,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:21:09,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:21:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:21:09,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:21:09,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:21:09,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:21:09,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:21:09,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:21:09,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:21:09,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:21:09,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:21:09,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:21:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:21:09,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:21:09,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:21:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:21:09,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:21:09,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:21:09,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 14:21:09,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:21:09,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 14:21:09,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:21:09,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:21:09,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:21:09,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-28 14:21:09,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:21:09,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:21:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:21:09,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197524764] [2020-10-28 14:21:09,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:21:09,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:21:09,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008200998] [2020-10-28 14:21:09,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:21:09,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:21:09,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:21:09,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:21:09,900 INFO L87 Difference]: Start difference. First operand 18154 states and 23785 transitions. Second operand 5 states. [2020-10-28 14:21:10,607 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68