/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/Problem19_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:37:19,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:37:19,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:37:20,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:37:20,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:37:20,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:37:20,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:37:20,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:37:20,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:37:20,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:37:20,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:37:20,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:37:20,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:37:20,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:37:20,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:37:20,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:37:20,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:37:20,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:37:20,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:37:20,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:37:20,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:37:20,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:37:20,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:37:20,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:37:20,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:37:20,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:37:20,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:37:20,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:37:20,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:37:20,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:37:20,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:37:20,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:37:20,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:37:20,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:37:20,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:37:20,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:37:20,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:37:20,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:37:20,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:37:20,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:37:20,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:37:20,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 00:37:20,206 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:37:20,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:37:20,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:37:20,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:37:20,211 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:37:20,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:37:20,212 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:37:20,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:37:20,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:37:20,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:37:20,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:37:20,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:37:20,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:37:20,214 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:37:20,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:37:20,215 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:37:20,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:37:20,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:37:20,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:37:20,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:37:20,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:37:20,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:37:20,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:37:20,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:37:20,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:37:20,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:37:20,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:37:20,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:37:20,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:37:20,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:37:20,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:37:20,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:37:20,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:37:20,697 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:37:20,698 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:37:20,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label02.c [2020-10-27 00:37:20,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71ca0c261/2f975849242a4a3c82d113dc6d140fa5/FLAG06ba16e97 [2020-10-27 00:37:22,067 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:37:22,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label02.c [2020-10-27 00:37:22,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71ca0c261/2f975849242a4a3c82d113dc6d140fa5/FLAG06ba16e97 [2020-10-27 00:37:22,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71ca0c261/2f975849242a4a3c82d113dc6d140fa5 [2020-10-27 00:37:22,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:37:22,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:37:22,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:37:22,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:37:22,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:37:22,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:37:22" (1/1) ... [2020-10-27 00:37:22,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c28b606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:22, skipping insertion in model container [2020-10-27 00:37:22,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:37:22" (1/1) ... [2020-10-27 00:37:22,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:37:22,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:37:24,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:37:24,926 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:37:26,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:37:26,293 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:37:26,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:26 WrapperNode [2020-10-27 00:37:26,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:37:26,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:37:26,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:37:26,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:37:26,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:26" (1/1) ... [2020-10-27 00:37:26,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:26" (1/1) ... [2020-10-27 00:37:26,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:26" (1/1) ... [2020-10-27 00:37:26,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:26" (1/1) ... [2020-10-27 00:37:26,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:26" (1/1) ... [2020-10-27 00:37:26,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:26" (1/1) ... [2020-10-27 00:37:26,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:26" (1/1) ... [2020-10-27 00:37:26,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:37:26,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:37:26,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:37:26,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:37:26,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:37:26,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:37:26,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:37:26,983 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:37:26,984 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:37:26,984 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:37:26,985 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:37:26,985 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:37:27,112 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:37:27,112 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:37:27,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:37:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:37:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:37:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:37:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:37:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:37:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:37:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:37:27,114 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:37:27,114 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:37:27,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:37:27,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:37:27,117 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:37:27,117 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:37:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:37:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:37:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:37:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:37:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:37:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:37:45,373 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:37:45,374 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:37:45,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:37:45 BoogieIcfgContainer [2020-10-27 00:37:45,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:37:45,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:37:45,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:37:45,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:37:45,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:37:22" (1/3) ... [2020-10-27 00:37:45,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28770217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:37:45, skipping insertion in model container [2020-10-27 00:37:45,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:26" (2/3) ... [2020-10-27 00:37:45,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28770217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:37:45, skipping insertion in model container [2020-10-27 00:37:45,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:37:45" (3/3) ... [2020-10-27 00:37:45,393 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label02.c [2020-10-27 00:37:45,406 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:37:45,413 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:37:45,427 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:37:45,468 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:37:45,468 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:37:45,468 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:37:45,468 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:37:45,468 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:37:45,469 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:37:45,469 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:37:45,469 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:37:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:37:45,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 00:37:45,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:37:45,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:37:45,529 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:37:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:37:45,536 INFO L82 PathProgramCache]: Analyzing trace with hash 244016286, now seen corresponding path program 1 times [2020-10-27 00:37:45,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:37:45,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318513182] [2020-10-27 00:37:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:37:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:37:45,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:37:46,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:37:46,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 00:37:46,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:37:46,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-27 00:37:46,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:37:46,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:37:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:37:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:37:46,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:37:46,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:37:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:37:46,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:37:46,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:37:46,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:37:46,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:37:46,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 00:37:46,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:37:46,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:37:46,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:37:46,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:37:46,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:37:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:37:46,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318513182] [2020-10-27 00:37:46,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:37:46,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:37:46,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037093182] [2020-10-27 00:37:46,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:37:46,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:37:46,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:37:46,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:37:46,953 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-27 00:38:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:38:21,818 INFO L93 Difference]: Finished difference Result 6485 states and 12305 transitions. [2020-10-27 00:38:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:38:21,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-27 00:38:21,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:38:21,881 INFO L225 Difference]: With dead ends: 6485 [2020-10-27 00:38:21,882 INFO L226 Difference]: Without dead ends: 4636 [2020-10-27 00:38:21,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:38:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2020-10-27 00:38:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 4630. [2020-10-27 00:38:22,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4630 states. [2020-10-27 00:38:22,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4630 states to 4630 states and 7750 transitions. [2020-10-27 00:38:22,220 INFO L78 Accepts]: Start accepts. Automaton has 4630 states and 7750 transitions. Word has length 73 [2020-10-27 00:38:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:38:22,222 INFO L481 AbstractCegarLoop]: Abstraction has 4630 states and 7750 transitions. [2020-10-27 00:38:22,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:38:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4630 states and 7750 transitions. [2020-10-27 00:38:22,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 00:38:22,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:38:22,241 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:38:22,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:38:22,242 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:38:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:38:22,244 INFO L82 PathProgramCache]: Analyzing trace with hash 658232229, now seen corresponding path program 1 times [2020-10-27 00:38:22,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:38:22,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274006046] [2020-10-27 00:38:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:38:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:22,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:22,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:23,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:24,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:24,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 00:38:24,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:38:24,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2131 [2020-10-27 00:38:24,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:24,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:38:24,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:38:24,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 00:38:24,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:38:24,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:38:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:24,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:24,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:24,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:38:24,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:38:24,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:38:24,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:24,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:38:24,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:38:24,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:38:24,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:38:24,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:38:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:24,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:24,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:24,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:38:24,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:38:24,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 00:38:24,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:24,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:38:24,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:38:24,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 00:38:24,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:38:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:38:24,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274006046] [2020-10-27 00:38:24,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:38:24,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:38:24,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765281040] [2020-10-27 00:38:24,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:38:24,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:38:24,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:38:24,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:38:24,976 INFO L87 Difference]: Start difference. First operand 4630 states and 7750 transitions. Second operand 7 states. [2020-10-27 00:39:09,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:39:09,385 INFO L93 Difference]: Finished difference Result 13731 states and 23286 transitions. [2020-10-27 00:39:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:39:09,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 151 [2020-10-27 00:39:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:39:09,441 INFO L225 Difference]: With dead ends: 13731 [2020-10-27 00:39:09,441 INFO L226 Difference]: Without dead ends: 9107 [2020-10-27 00:39:09,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:39:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9107 states. [2020-10-27 00:39:09,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9107 to 9001. [2020-10-27 00:39:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9001 states. [2020-10-27 00:39:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 13450 transitions. [2020-10-27 00:39:09,787 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 13450 transitions. Word has length 151 [2020-10-27 00:39:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:39:09,790 INFO L481 AbstractCegarLoop]: Abstraction has 9001 states and 13450 transitions. [2020-10-27 00:39:09,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:39:09,791 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 13450 transitions. [2020-10-27 00:39:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-27 00:39:09,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:39:09,803 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:39:09,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:39:09,804 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:39:09,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:39:09,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1726791976, now seen corresponding path program 1 times [2020-10-27 00:39:09,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:39:09,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861107777] [2020-10-27 00:39:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:39:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:09,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:10,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:11,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:12,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:12,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 00:39:12,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:39:12,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2596 [2020-10-27 00:39:12,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:12,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:39:12,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:39:12,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:39:12,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:39:12,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:39:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:12,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:12,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:12,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:39:12,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:39:12,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 00:39:12,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:12,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:39:12,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:39:12,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:39:12,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:39:12,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:39:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:12,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:13,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:13,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:39:13,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:39:13,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-27 00:39:13,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:13,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:39:13,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:39:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:39:13,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:39:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:39:13,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861107777] [2020-10-27 00:39:13,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:39:13,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:39:13,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228232426] [2020-10-27 00:39:13,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:39:13,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:39:13,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:39:13,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:39:13,176 INFO L87 Difference]: Start difference. First operand 9001 states and 13450 transitions. Second operand 7 states. [2020-10-27 00:40:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:40:01,148 INFO L93 Difference]: Finished difference Result 27562 states and 42509 transitions. [2020-10-27 00:40:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:40:01,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 174 [2020-10-27 00:40:01,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:40:01,261 INFO L225 Difference]: With dead ends: 27562 [2020-10-27 00:40:01,261 INFO L226 Difference]: Without dead ends: 18567 [2020-10-27 00:40:01,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:40:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18567 states. [2020-10-27 00:40:01,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18567 to 18188. [2020-10-27 00:40:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18188 states. [2020-10-27 00:40:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18188 states to 18188 states and 24876 transitions. [2020-10-27 00:40:01,857 INFO L78 Accepts]: Start accepts. Automaton has 18188 states and 24876 transitions. Word has length 174 [2020-10-27 00:40:01,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:40:01,858 INFO L481 AbstractCegarLoop]: Abstraction has 18188 states and 24876 transitions. [2020-10-27 00:40:01,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:40:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 18188 states and 24876 transitions. [2020-10-27 00:40:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-27 00:40:01,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:40:01,868 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:40:01,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:40:01,868 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:40:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:40:01,869 INFO L82 PathProgramCache]: Analyzing trace with hash 597030145, now seen corresponding path program 1 times [2020-10-27 00:40:01,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:40:01,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028202997] [2020-10-27 00:40:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:40:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:01,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:02,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:03,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:04,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:04,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-27 00:40:04,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:40:04,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2186 [2020-10-27 00:40:04,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:04,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:40:04,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:40:04,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-27 00:40:04,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:04,364 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:40:04,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:40:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:04,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:04,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:04,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:40:04,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:04,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:40:04,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:04,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:40:04,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:40:04,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:40:04,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:04,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:40:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:04,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:04,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:04,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 00:40:04,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:04,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-27 00:40:04,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:04,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:40:04,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:40:04,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 00:40:04,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:40:04,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028202997] [2020-10-27 00:40:04,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:40:04,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:40:04,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456336893] [2020-10-27 00:40:04,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:40:04,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:40:04,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:40:04,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:40:04,929 INFO L87 Difference]: Start difference. First operand 18188 states and 24876 transitions. Second operand 7 states. [2020-10-27 00:40:05,076 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:41:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:41:07,503 INFO L93 Difference]: Finished difference Result 53866 states and 79793 transitions. [2020-10-27 00:41:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:41:07,508 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 215 [2020-10-27 00:41:07,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:41:07,683 INFO L225 Difference]: With dead ends: 53866 [2020-10-27 00:41:07,684 INFO L226 Difference]: Without dead ends: 35684 [2020-10-27 00:41:07,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:41:07,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35684 states. [2020-10-27 00:41:09,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35684 to 34913. [2020-10-27 00:41:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34913 states. [2020-10-27 00:41:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34913 states to 34913 states and 45778 transitions. [2020-10-27 00:41:09,178 INFO L78 Accepts]: Start accepts. Automaton has 34913 states and 45778 transitions. Word has length 215 [2020-10-27 00:41:09,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:41:09,180 INFO L481 AbstractCegarLoop]: Abstraction has 34913 states and 45778 transitions. [2020-10-27 00:41:09,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:41:09,180 INFO L276 IsEmpty]: Start isEmpty. Operand 34913 states and 45778 transitions. [2020-10-27 00:41:09,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-10-27 00:41:09,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:41:09,186 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:41:09,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:41:09,187 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:41:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:41:09,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1352143311, now seen corresponding path program 1 times [2020-10-27 00:41:09,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:41:09,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583348248] [2020-10-27 00:41:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:41:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:09,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:09,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:09,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:09,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:13,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:14,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:14,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-27 00:41:14,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:41:14,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 00:41:14,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:14,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:41:14,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:41:14,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 203 [2020-10-27 00:41:14,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:14,440 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:41:14,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:41:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:14,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:14,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:14,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:41:14,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:14,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:41:14,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:41:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:41:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:41:14,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:14,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:41:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:14,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:14,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:14,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:14,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 00:41:14,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:41:14,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-27 00:41:14,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:14,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:41:14,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:41:14,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 00:41:14,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:14,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-27 00:41:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:14,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:15,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:15,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:41:15,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:15,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 00:41:15,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:15,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:41:15,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:41:15,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 00:41:15,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:41:15,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583348248] [2020-10-27 00:41:15,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:41:15,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:41:15,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382216303] [2020-10-27 00:41:15,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:41:15,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:41:15,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:41:15,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:41:15,346 INFO L87 Difference]: Start difference. First operand 34913 states and 45778 transitions. Second operand 8 states. [2020-10-27 00:41:15,523 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 66