/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_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:15:51,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:15:51,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:15:51,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:15:51,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:15:51,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:15:51,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:15:51,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:15:51,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:15:51,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:15:51,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:15:51,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:15:51,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:15:51,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:15:51,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:15:51,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:15:51,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:15:51,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:15:51,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:15:51,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:15:51,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:15:51,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:15:51,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:15:51,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:15:52,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:15:52,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:15:52,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:15:52,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:15:52,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:15:52,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:15:52,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:15:52,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:15:52,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:15:52,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:15:52,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:15:52,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:15:52,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:15:52,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:15:52,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:15:52,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:15:52,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:15:52,047 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 14:15:52,093 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:15:52,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:15:52,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:15:52,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:15:52,098 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:15:52,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:15:52,099 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:15:52,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:15:52,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:15:52,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:15:52,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:15:52,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:15:52,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:15:52,101 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:15:52,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:15:52,102 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:15:52,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:15:52,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:15:52,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:15:52,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:15:52,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:15:52,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:15:52,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:15:52,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:15:52,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:15:52,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:15:52,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:15:52,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:15:52,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:15:52,105 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:15:52,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:15:52,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:15:52,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:15:52,568 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:15:52,569 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:15:52,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label50.c [2020-10-28 14:15:52,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf3bcec0e/7f9d415835a4486f91d2a5a784ea795a/FLAGd4140de5f [2020-10-28 14:15:53,969 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:15:53,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label50.c [2020-10-28 14:15:54,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf3bcec0e/7f9d415835a4486f91d2a5a784ea795a/FLAGd4140de5f [2020-10-28 14:15:54,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf3bcec0e/7f9d415835a4486f91d2a5a784ea795a [2020-10-28 14:15:54,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:15:54,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:15:54,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:15:54,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:15:54,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:15:54,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:15:54" (1/1) ... [2020-10-28 14:15:54,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@643921e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:15:54, skipping insertion in model container [2020-10-28 14:15:54,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:15:54" (1/1) ... [2020-10-28 14:15:54,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:15:54,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:15:56,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:15:56,498 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:15:57,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:15:57,649 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:15:57,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:15:57 WrapperNode [2020-10-28 14:15:57,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:15:57,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:15:57,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:15:57,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:15:57,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:15:57" (1/1) ... [2020-10-28 14:15:57,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:15:57" (1/1) ... [2020-10-28 14:15:57,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:15:57" (1/1) ... [2020-10-28 14:15:57,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:15:57" (1/1) ... [2020-10-28 14:15:58,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:15:57" (1/1) ... [2020-10-28 14:15:58,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:15:57" (1/1) ... [2020-10-28 14:15:58,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:15:57" (1/1) ... [2020-10-28 14:15:58,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:15:58,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:15:58,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:15:58,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:15:58,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:15:57" (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 14:15:58,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:15:58,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:15:58,397 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:15:58,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:15:58,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:15:58,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:15:58,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:15:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:15:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:15:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:15:58,399 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:15:58,399 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:15:58,399 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:15:58,399 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:15:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:15:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:15:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:15:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:15:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:15:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:15:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:15:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:15:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:15:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:15:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:15:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:15:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:15:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:15:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:16:14,133 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:16:14,136 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:16:14,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:16:14 BoogieIcfgContainer [2020-10-28 14:16:14,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:16:14,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:16:14,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:16:14,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:16:14,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:15:54" (1/3) ... [2020-10-28 14:16:14,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1248394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:16:14, skipping insertion in model container [2020-10-28 14:16:14,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:15:57" (2/3) ... [2020-10-28 14:16:14,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1248394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:16:14, skipping insertion in model container [2020-10-28 14:16:14,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:16:14" (3/3) ... [2020-10-28 14:16:14,151 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label50.c [2020-10-28 14:16:14,163 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:16:14,169 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:16:14,183 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:16:14,233 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:16:14,233 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:16:14,233 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:16:14,233 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:16:14,233 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:16:14,234 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:16:14,234 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:16:14,234 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:16:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:16:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:16:14,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:16:14,297 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] [2020-10-28 14:16:14,298 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:16:14,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:16:14,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1388150586, now seen corresponding path program 1 times [2020-10-28 14:16:14,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:16:14,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361553959] [2020-10-28 14:16:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:16:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:14,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:15,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:15,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:16:15,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:15,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-28 14:16:15,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:15,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:15,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:16:15,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:16:15,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:16:15,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:16:15,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:16:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:15,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:15,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:15,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:16:15,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:15,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 14:16:15,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:15,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:15,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:16:15,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:16:15,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:16:15,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:16:15,291 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 14:16:15,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361553959] [2020-10-28 14:16:15,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:16:15,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:16:15,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474571930] [2020-10-28 14:16:15,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:16:15,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:16:15,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:16:15,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:16:15,323 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:16:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:16:41,239 INFO L93 Difference]: Finished difference Result 5036 states and 9459 transitions. [2020-10-28 14:16:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:16:41,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-28 14:16:41,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:16:41,292 INFO L225 Difference]: With dead ends: 5036 [2020-10-28 14:16:41,292 INFO L226 Difference]: Without dead ends: 3191 [2020-10-28 14:16:41,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 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 14:16:41,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2020-10-28 14:16:41,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3185. [2020-10-28 14:16:41,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2020-10-28 14:16:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4966 transitions. [2020-10-28 14:16:41,545 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4966 transitions. Word has length 27 [2020-10-28 14:16:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:16:41,546 INFO L481 AbstractCegarLoop]: Abstraction has 3185 states and 4966 transitions. [2020-10-28 14:16:41,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:16:41,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4966 transitions. [2020-10-28 14:16:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 14:16:41,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:16:41,551 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:16:41,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:16:41,552 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:16:41,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:16:41,553 INFO L82 PathProgramCache]: Analyzing trace with hash 504499939, now seen corresponding path program 1 times [2020-10-28 14:16:41,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:16:41,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107110402] [2020-10-28 14:16:41,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:16:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:41,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:41,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:42,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:42,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:43,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:43,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:43,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:43,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 14:16:43,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:16:43,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2357 [2020-10-28 14:16:43,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:43,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:43,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:16:43,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-28 14:16:43,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:16:43,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:16:44,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:16:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:44,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:44,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:44,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:16:44,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:44,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:16:44,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:44,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:44,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:16:44,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:16:44,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:16:44,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:16:44,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:16:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:44,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:44,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:44,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:16:44,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:44,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-28 14:16:44,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:44,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:44,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:16:44,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 14:16:44,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:16:44,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:16:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:16:44,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107110402] [2020-10-28 14:16:44,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:16:44,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:16:44,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437424074] [2020-10-28 14:16:44,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:16:44,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:16:44,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:16:44,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:16:44,346 INFO L87 Difference]: Start difference. First operand 3185 states and 4966 transitions. Second operand 5 states. [2020-10-28 14:17:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:17:19,537 INFO L93 Difference]: Finished difference Result 9220 states and 14514 transitions. [2020-10-28 14:17:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:17:19,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2020-10-28 14:17:19,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:17:19,574 INFO L225 Difference]: With dead ends: 9220 [2020-10-28 14:17:19,575 INFO L226 Difference]: Without dead ends: 6041 [2020-10-28 14:17:19,584 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 14:17:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6041 states. [2020-10-28 14:17:19,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6041 to 6025. [2020-10-28 14:17:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6025 states. [2020-10-28 14:17:19,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 8358 transitions. [2020-10-28 14:17:19,763 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 8358 transitions. Word has length 100 [2020-10-28 14:17:19,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:17:19,764 INFO L481 AbstractCegarLoop]: Abstraction has 6025 states and 8358 transitions. [2020-10-28 14:17:19,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:17:19,765 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 8358 transitions. [2020-10-28 14:17:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 14:17:19,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:17:19,774 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:17:19,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:17:19,774 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:17:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:17:19,776 INFO L82 PathProgramCache]: Analyzing trace with hash 566539553, now seen corresponding path program 1 times [2020-10-28 14:17:19,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:17:19,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593269097] [2020-10-28 14:17:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:17:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:17:19,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:20,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:20,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:20,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:17:20,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 14:17:20,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:17:20,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1068 [2020-10-28 14:17:20,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:17:20,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:17:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:17:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:17:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 14:17:20,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:17:21,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:17:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:17:21,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:21,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:17:21,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:17:21,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:17:21,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 14:17:21,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:17:21,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:17:21,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:17:21,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:17:21,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:17:21,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:17:21,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:17:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:17:21,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:21,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:17:21,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:17:21,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:17:21,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 14:17:21,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:17:21,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:17:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:17:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:17:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 14:17:21,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:17:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:17:21,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593269097] [2020-10-28 14:17:21,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:17:21,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:17:21,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43504494] [2020-10-28 14:17:21,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:17:21,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:17:21,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:17:21,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:17:21,300 INFO L87 Difference]: Start difference. First operand 6025 states and 8358 transitions. Second operand 7 states. [2020-10-28 14:18:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:18:09,856 INFO L93 Difference]: Finished difference Result 18008 states and 25148 transitions. [2020-10-28 14:18:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:18:09,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2020-10-28 14:18:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:18:09,937 INFO L225 Difference]: With dead ends: 18008 [2020-10-28 14:18:09,938 INFO L226 Difference]: Without dead ends: 11989 [2020-10-28 14:18:09,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:18:09,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11989 states. [2020-10-28 14:18:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11989 to 11915. [2020-10-28 14:18:10,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11915 states. [2020-10-28 14:18:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11915 states to 11915 states and 16127 transitions. [2020-10-28 14:18:10,493 INFO L78 Accepts]: Start accepts. Automaton has 11915 states and 16127 transitions. Word has length 100 [2020-10-28 14:18:10,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:18:10,497 INFO L481 AbstractCegarLoop]: Abstraction has 11915 states and 16127 transitions. [2020-10-28 14:18:10,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:18:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 11915 states and 16127 transitions. [2020-10-28 14:18:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 14:18:10,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:18:10,508 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-10-28 14:18:10,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:18:10,508 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:18:10,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:18:10,512 INFO L82 PathProgramCache]: Analyzing trace with hash 203301296, now seen corresponding path program 1 times [2020-10-28 14:18:10,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:18:10,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309350270] [2020-10-28 14:18:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:18:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:10,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:10,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:11,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:11,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:11,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-28 14:18:11,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:18:11,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1391 [2020-10-28 14:18:11,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:11,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:11,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:18:11,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:18:11,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 14:18:11,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:12,151 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:18:12,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:18:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:12,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:12,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:12,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:18:12,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:18:12,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:18:12,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:12,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:12,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:18:12,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:18:12,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:18:12,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:12,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:18:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:12,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:12,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:12,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:18:12,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:18:12,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-28 14:18:12,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:12,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:18:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:18:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 14:18:12,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:18:12,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309350270] [2020-10-28 14:18:12,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:18:12,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:18:12,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611301782] [2020-10-28 14:18:12,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:18:12,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:18:12,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:18:12,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:18:12,634 INFO L87 Difference]: Start difference. First operand 11915 states and 16127 transitions. Second operand 7 states. [2020-10-28 14:18:12,797 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:19:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:19:07,437 INFO L93 Difference]: Finished difference Result 29992 states and 40701 transitions. [2020-10-28 14:19:07,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:19:07,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 128 [2020-10-28 14:19:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:19:07,513 INFO L225 Difference]: With dead ends: 29992 [2020-10-28 14:19:07,514 INFO L226 Difference]: Without dead ends: 18083 [2020-10-28 14:19:07,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:19:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18083 states. [2020-10-28 14:19:07,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18083 to 17804. [2020-10-28 14:19:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17804 states. [2020-10-28 14:19:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17804 states to 17804 states and 22479 transitions. [2020-10-28 14:19:07,971 INFO L78 Accepts]: Start accepts. Automaton has 17804 states and 22479 transitions. Word has length 128 [2020-10-28 14:19:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:19:07,973 INFO L481 AbstractCegarLoop]: Abstraction has 17804 states and 22479 transitions. [2020-10-28 14:19:07,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:19:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 17804 states and 22479 transitions. [2020-10-28 14:19:07,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-10-28 14:19:07,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:19:07,988 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 14:19:07,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:19:07,988 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:19:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:19:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash -644107924, now seen corresponding path program 1 times [2020-10-28 14:19:07,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:19:07,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768709279] [2020-10-28 14:19:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:19:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:08,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:08,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:08,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:10,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:13,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:13,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-10-28 14:19:13,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:19:13,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 14:19:13,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:13,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:13,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:19:13,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:19:13,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-28 14:19:13,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:19:13,384 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:19:13,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:19:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:13,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:13,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:13,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:19:13,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:19:13,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:19:13,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:13,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:19:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:19:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:19:13,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:19:13,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:19:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:13,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:13,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:13,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-28 14:19:13,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:19:13,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-28 14:19:13,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:13,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:13,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:19:13,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:19:13,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-28 14:19:13,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:19:14,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2020-10-28 14:19:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:14,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:14,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:14,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-28 14:19:14,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:19:14,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 14:19:14,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:14,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:14,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:19:14,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 162 [2020-10-28 14:19:14,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:19:14,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:19:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 38 proven. 159 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 14:19:15,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768709279] [2020-10-28 14:19:15,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:19:15,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:19:15,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995075956] [2020-10-28 14:19:15,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:19:15,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:19:15,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:19:15,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:19:15,594 INFO L87 Difference]: Start difference. First operand 17804 states and 22479 transitions. Second operand 7 states. [2020-10-28 14:19:15,753 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:19:19,051 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 71