/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/Problem12_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:22:21,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:22:21,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:22:21,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:22:21,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:22:21,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:22:21,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:22:21,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:22:21,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:22:21,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:22:21,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:22:21,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:22:21,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:22:21,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:22:21,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:22:21,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:22:21,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:22:21,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:22:21,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:22:21,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:22:21,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:22:21,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:22:21,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:22:21,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:22:21,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:22:21,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:22:21,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:22:21,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:22:21,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:22:21,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:22:21,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:22:21,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:22:21,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:22:21,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:22:21,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:22:21,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:22:21,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:22:21,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:22:21,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:22:21,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:22:21,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:22:21,226 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 12:22:21,288 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:22:21,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:22:21,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:22:21,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:22:21,294 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:22:21,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:22:21,294 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:22:21,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:22:21,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:22:21,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:22:21,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:22:21,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:22:21,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:22:21,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:22:21,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:22:21,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:22:21,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:22:21,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:22:21,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:22:21,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:22:21,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:22:21,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:22:21,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:22:21,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:22:21,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:22:21,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:22:21,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:22:21,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:22:21,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:22:21,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:22:21,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:22:21,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:22:21,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:22:21,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:22:21,780 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:22:21,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label39.c [2020-10-28 12:22:21,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3674958bf/89a0e5f41b7e493f98227a63ea9718ce/FLAGcb633e8f6 [2020-10-28 12:22:22,917 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:22:22,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label39.c [2020-10-28 12:22:22,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3674958bf/89a0e5f41b7e493f98227a63ea9718ce/FLAGcb633e8f6 [2020-10-28 12:22:23,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3674958bf/89a0e5f41b7e493f98227a63ea9718ce [2020-10-28 12:22:23,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:22:23,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:22:23,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:22:23,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:22:23,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:22:23,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:22:23" (1/1) ... [2020-10-28 12:22:23,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6bf0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:23, skipping insertion in model container [2020-10-28 12:22:23,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:22:23" (1/1) ... [2020-10-28 12:22:23,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:22:23,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:22:24,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:22:24,940 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:22:25,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:22:25,667 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:22:25,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:25 WrapperNode [2020-10-28 12:22:25,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:22:25,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:22:25,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:22:25,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:22:25,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:25" (1/1) ... [2020-10-28 12:22:25,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:25" (1/1) ... [2020-10-28 12:22:25,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:25" (1/1) ... [2020-10-28 12:22:25,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:25" (1/1) ... [2020-10-28 12:22:25,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:25" (1/1) ... [2020-10-28 12:22:25,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:25" (1/1) ... [2020-10-28 12:22:25,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:25" (1/1) ... [2020-10-28 12:22:25,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:22:26,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:22:26,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:22:26,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:22:26,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:25" (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 12:22:26,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:22:26,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:22:26,094 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:22:26,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:22:26,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 12:22:26,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 12:22:26,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 12:22:26,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:22:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:22:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 12:22:26,097 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 12:22:26,097 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 12:22:26,097 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:22:26,097 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:22:26,098 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:22:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:22:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:22:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:22:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:22:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:22:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:22:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:22:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:22:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:22:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:22:32,080 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:22:32,080 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:22:32,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:22:32 BoogieIcfgContainer [2020-10-28 12:22:32,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:22:32,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:22:32,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:22:32,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:22:32,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:22:23" (1/3) ... [2020-10-28 12:22:32,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382e460a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:22:32, skipping insertion in model container [2020-10-28 12:22:32,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:25" (2/3) ... [2020-10-28 12:22:32,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382e460a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:22:32, skipping insertion in model container [2020-10-28 12:22:32,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:22:32" (3/3) ... [2020-10-28 12:22:32,094 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label39.c [2020-10-28 12:22:32,107 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:22:32,113 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:22:32,127 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:22:32,164 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:22:32,164 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:22:32,164 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:22:32,164 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:22:32,165 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:22:32,165 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:22:32,165 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:22:32,165 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:22:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-28 12:22:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 12:22:32,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:22:32,211 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] [2020-10-28 12:22:32,211 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:22:32,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:22:32,218 INFO L82 PathProgramCache]: Analyzing trace with hash 780687052, now seen corresponding path program 1 times [2020-10-28 12:22:32,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:22:32,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854341952] [2020-10-28 12:22:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:22:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:32,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:32,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:32,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 12:22:32,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:22:32,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-28 12:22:32,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:32,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:32,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:22:32,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:22:32,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 12:22:32,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:22:33,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:22:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:33,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:33,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:33,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:22:33,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:22:33,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 12:22:33,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:33,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:22:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:22:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:22:33,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:22:33,234 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 12:22:33,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854341952] [2020-10-28 12:22:33,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:22:33,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 12:22:33,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310924547] [2020-10-28 12:22:33,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:22:33,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:22:33,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:22:33,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:22:33,265 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 5 states. [2020-10-28 12:22:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:22:49,520 INFO L93 Difference]: Finished difference Result 3258 states and 6300 transitions. [2020-10-28 12:22:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 12:22:49,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-28 12:22:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:22:49,563 INFO L225 Difference]: With dead ends: 3258 [2020-10-28 12:22:49,564 INFO L226 Difference]: Without dead ends: 2347 [2020-10-28 12:22:49,576 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 [2020-10-28 12:22:49,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2020-10-28 12:22:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2332. [2020-10-28 12:22:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2332 states. [2020-10-28 12:22:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3788 transitions. [2020-10-28 12:22:49,847 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3788 transitions. Word has length 28 [2020-10-28 12:22:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:22:49,848 INFO L481 AbstractCegarLoop]: Abstraction has 2332 states and 3788 transitions. [2020-10-28 12:22:49,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:22:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3788 transitions. [2020-10-28 12:22:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 12:22:49,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:22:49,854 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 12:22:49,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:22:49,855 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:22:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:22:49,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1476434550, now seen corresponding path program 1 times [2020-10-28 12:22:49,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:22:49,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160239310] [2020-10-28 12:22:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:22:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:49,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:50,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:50,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:50,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 12:22:50,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:22:50,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-28 12:22:50,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:50,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:50,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:22:50,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 12:22:50,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 12:22:50,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:22:50,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:22:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:50,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:50,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:50,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:22:50,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:22:50,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 12:22:50,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:50,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:50,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:22:50,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:22:50,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:22:50,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:22:51,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:22:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:51,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:51,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:51,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:22:51,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:22:51,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-28 12:22:51,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:51,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:51,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:22:51,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:22:51,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:22:51,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:22:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:22:51,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160239310] [2020-10-28 12:22:51,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:22:51,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:22:51,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182737118] [2020-10-28 12:22:51,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:22:51,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:22:51,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:22:51,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:22:51,180 INFO L87 Difference]: Start difference. First operand 2332 states and 3788 transitions. Second operand 5 states. [2020-10-28 12:23:04,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:23:04,046 INFO L93 Difference]: Finished difference Result 7005 states and 11519 transitions. [2020-10-28 12:23:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:23:04,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2020-10-28 12:23:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:23:04,087 INFO L225 Difference]: With dead ends: 7005 [2020-10-28 12:23:04,088 INFO L226 Difference]: Without dead ends: 4679 [2020-10-28 12:23:04,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:23:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2020-10-28 12:23:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4663. [2020-10-28 12:23:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4663 states. [2020-10-28 12:23:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 6410 transitions. [2020-10-28 12:23:04,279 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 6410 transitions. Word has length 103 [2020-10-28 12:23:04,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:23:04,282 INFO L481 AbstractCegarLoop]: Abstraction has 4663 states and 6410 transitions. [2020-10-28 12:23:04,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:23:04,282 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 6410 transitions. [2020-10-28 12:23:04,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 12:23:04,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:23:04,293 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 12:23:04,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:23:04,294 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:23:04,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:23:04,295 INFO L82 PathProgramCache]: Analyzing trace with hash -127071998, now seen corresponding path program 1 times [2020-10-28 12:23:04,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:23:04,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276287393] [2020-10-28 12:23:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:23:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:04,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:04,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:05,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:05,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 12:23:05,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:23:05,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 952 [2020-10-28 12:23:05,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:05,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:23:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:23:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 12:23:05,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:23:05,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:23:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:05,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:05,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:05,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:23:05,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:23:05,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 12:23:05,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:05,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:05,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:23:05,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:23:05,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:23:05,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:23:05,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:23:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:05,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:05,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:05,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 12:23:05,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:23:05,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-28 12:23:05,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:05,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:05,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:23:05,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:23:05,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 12:23:05,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:23:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:23:05,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276287393] [2020-10-28 12:23:05,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:23:05,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:23:05,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297222189] [2020-10-28 12:23:05,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:23:05,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:23:05,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:23:05,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:23:05,885 INFO L87 Difference]: Start difference. First operand 4663 states and 6410 transitions. Second operand 7 states. [2020-10-28 12:23:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:23:20,671 INFO L93 Difference]: Finished difference Result 14203 states and 19824 transitions. [2020-10-28 12:23:20,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:23:20,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-28 12:23:20,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:23:20,715 INFO L225 Difference]: With dead ends: 14203 [2020-10-28 12:23:20,716 INFO L226 Difference]: Without dead ends: 7191 [2020-10-28 12:23:20,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:23:20,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7191 states. [2020-10-28 12:23:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7191 to 7095. [2020-10-28 12:23:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7095 states. [2020-10-28 12:23:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7095 states to 7095 states and 9315 transitions. [2020-10-28 12:23:21,045 INFO L78 Accepts]: Start accepts. Automaton has 7095 states and 9315 transitions. Word has length 107 [2020-10-28 12:23:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:23:21,053 INFO L481 AbstractCegarLoop]: Abstraction has 7095 states and 9315 transitions. [2020-10-28 12:23:21,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:23:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7095 states and 9315 transitions. [2020-10-28 12:23:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 12:23:21,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:23:21,060 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 12:23:21,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:23:21,062 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:23:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:23:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1185386926, now seen corresponding path program 1 times [2020-10-28 12:23:21,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:23:21,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098343085] [2020-10-28 12:23:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:23:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:21,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:21,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:22,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:22,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:22,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 12:23:22,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:23:22,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-28 12:23:22,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:22,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:23:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:23:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:23:22,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:23:22,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:23:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:22,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:22,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:22,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:23:22,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:23:22,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 12:23:22,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:22,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:23:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:23:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:23:22,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:23:22,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:23:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:22,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:22,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:22,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 12:23:22,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:23:22,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-28 12:23:22,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:22,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:22,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:23:22,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:23:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 12:23:22,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:23:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:23:22,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098343085] [2020-10-28 12:23:22,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:23:22,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:23:22,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232317002] [2020-10-28 12:23:22,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:23:22,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:23:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:23:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:23:22,668 INFO L87 Difference]: Start difference. First operand 7095 states and 9315 transitions. Second operand 7 states. [2020-10-28 12:23:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:23:40,685 INFO L93 Difference]: Finished difference Result 21869 states and 29865 transitions. [2020-10-28 12:23:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:23:40,687 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 117 [2020-10-28 12:23:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:23:40,782 INFO L225 Difference]: With dead ends: 21869 [2020-10-28 12:23:40,783 INFO L226 Difference]: Without dead ends: 14780 [2020-10-28 12:23:40,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:23:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14780 states. [2020-10-28 12:23:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14780 to 14557. [2020-10-28 12:23:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14557 states. [2020-10-28 12:23:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14557 states to 14557 states and 18242 transitions. [2020-10-28 12:23:41,413 INFO L78 Accepts]: Start accepts. Automaton has 14557 states and 18242 transitions. Word has length 117 [2020-10-28 12:23:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:23:41,415 INFO L481 AbstractCegarLoop]: Abstraction has 14557 states and 18242 transitions. [2020-10-28 12:23:41,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:23:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 14557 states and 18242 transitions. [2020-10-28 12:23:41,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-28 12:23:41,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:23:41,423 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:23:41,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:23:41,423 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:23:41,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:23:41,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1175462492, now seen corresponding path program 1 times [2020-10-28 12:23:41,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:23:41,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52217064] [2020-10-28 12:23:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:23:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:41,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:41,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:43,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:43,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-28 12:23:43,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:23:43,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2129 [2020-10-28 12:23:43,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:43,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:23:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:23:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-28 12:23:43,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:23:43,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:23:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:43,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:43,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:43,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:23:43,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:23:43,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 12:23:43,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:43,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:43,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:23:43,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:23:43,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:23:43,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:23:43,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:23:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:43,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:44,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:44,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 12:23:44,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:23:44,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-28 12:23:44,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:44,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:44,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:23:44,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:23:44,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-28 12:23:44,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:23:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:23:44,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52217064] [2020-10-28 12:23:44,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:23:44,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:23:44,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745831779] [2020-10-28 12:23:44,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:23:44,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:23:44,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:23:44,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:23:44,607 INFO L87 Difference]: Start difference. First operand 14557 states and 18242 transitions. Second operand 7 states. [2020-10-28 12:23:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:23:58,023 INFO L93 Difference]: Finished difference Result 31862 states and 39855 transitions. [2020-10-28 12:23:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 12:23:58,026 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 176 [2020-10-28 12:23:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:23:58,088 INFO L225 Difference]: With dead ends: 31862 [2020-10-28 12:23:58,089 INFO L226 Difference]: Without dead ends: 17311 [2020-10-28 12:23:58,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 12:23:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17311 states. [2020-10-28 12:23:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17311 to 16342. [2020-10-28 12:23:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16342 states. [2020-10-28 12:23:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16342 states to 16342 states and 20395 transitions. [2020-10-28 12:23:58,602 INFO L78 Accepts]: Start accepts. Automaton has 16342 states and 20395 transitions. Word has length 176 [2020-10-28 12:23:58,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:23:58,603 INFO L481 AbstractCegarLoop]: Abstraction has 16342 states and 20395 transitions. [2020-10-28 12:23:58,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:23:58,603 INFO L276 IsEmpty]: Start isEmpty. Operand 16342 states and 20395 transitions. [2020-10-28 12:23:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-28 12:23:58,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:23:58,608 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:23:58,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:23:58,609 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:23:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:23:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2143941120, now seen corresponding path program 1 times [2020-10-28 12:23:58,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:23:58,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741122381] [2020-10-28 12:23:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:23:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:58,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:59,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:00,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:00,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-28 12:24:00,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:24:00,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1446 [2020-10-28 12:24:00,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:00,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:24:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:24:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-28 12:24:00,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:24:00,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:24:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:00,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:00,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:00,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:24:00,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:00,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 12:24:00,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:00,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:24:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:24:00,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:00,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:24:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:00,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:00,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:00,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-28 12:24:00,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:00,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-28 12:24:00,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:00,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:24:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:24:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-28 12:24:00,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:24:01,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741122381] [2020-10-28 12:24:01,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:24:01,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:24:01,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833775607] [2020-10-28 12:24:01,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:24:01,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:24:01,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:24:01,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:24:01,126 INFO L87 Difference]: Start difference. First operand 16342 states and 20395 transitions. Second operand 7 states. [2020-10-28 12:24:18,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:24:18,897 INFO L93 Difference]: Finished difference Result 43368 states and 56389 transitions. [2020-10-28 12:24:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:24:18,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 226 [2020-10-28 12:24:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:24:19,086 INFO L225 Difference]: With dead ends: 43368 [2020-10-28 12:24:19,086 INFO L226 Difference]: Without dead ends: 27032 [2020-10-28 12:24:19,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:24:19,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27032 states. [2020-10-28 12:24:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27032 to 25254. [2020-10-28 12:24:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25254 states. [2020-10-28 12:24:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25254 states to 25254 states and 30668 transitions. [2020-10-28 12:24:19,844 INFO L78 Accepts]: Start accepts. Automaton has 25254 states and 30668 transitions. Word has length 226 [2020-10-28 12:24:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:24:19,845 INFO L481 AbstractCegarLoop]: Abstraction has 25254 states and 30668 transitions. [2020-10-28 12:24:19,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:24:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 25254 states and 30668 transitions. [2020-10-28 12:24:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-28 12:24:19,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:24:19,850 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 12:24:19,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:24:19,851 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:24:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:24:19,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1984210308, now seen corresponding path program 1 times [2020-10-28 12:24:19,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:24:19,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999995980] [2020-10-28 12:24:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:24:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:19,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:20,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:21,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:21,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:21,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 276 [2020-10-28 12:24:21,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:24:21,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1539 [2020-10-28 12:24:21,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:21,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:24:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-28 12:24:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-28 12:24:21,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:21,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:24:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:21,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:21,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:21,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:24:21,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:21,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 12:24:21,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:21,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:21,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:24:21,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:21,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:24:21,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:21,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:24:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:21,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:21,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:21,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 12:24:21,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:21,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-28 12:24:21,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:21,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:24:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-28 12:24:21,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:21,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-28 12:24:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:21,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:22,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:22,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:22,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 12:24:22,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:24:22,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-28 12:24:22,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:22,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:22,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:24:22,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:22,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 12:24:22,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-28 12:24:22,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999995980] [2020-10-28 12:24:22,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:24:22,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:24:22,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688931061] [2020-10-28 12:24:22,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:24:22,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:24:22,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:24:22,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:24:22,247 INFO L87 Difference]: Start difference. First operand 25254 states and 30668 transitions. Second operand 7 states. [2020-10-28 12:24:53,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:24:53,280 INFO L93 Difference]: Finished difference Result 92074 states and 118333 transitions. [2020-10-28 12:24:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 12:24:53,283 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 262 [2020-10-28 12:24:53,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:24:53,595 INFO L225 Difference]: With dead ends: 92074 [2020-10-28 12:24:53,595 INFO L226 Difference]: Without dead ends: 67593 [2020-10-28 12:24:53,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-28 12:24:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67593 states. [2020-10-28 12:24:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67593 to 62219. [2020-10-28 12:24:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62219 states. [2020-10-28 12:24:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62219 states to 62219 states and 78856 transitions. [2020-10-28 12:24:56,049 INFO L78 Accepts]: Start accepts. Automaton has 62219 states and 78856 transitions. Word has length 262 [2020-10-28 12:24:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:24:56,050 INFO L481 AbstractCegarLoop]: Abstraction has 62219 states and 78856 transitions. [2020-10-28 12:24:56,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:24:56,050 INFO L276 IsEmpty]: Start isEmpty. Operand 62219 states and 78856 transitions. [2020-10-28 12:24:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-28 12:24:56,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:24:56,057 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 12:24:56,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 12:24:56,057 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:24:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:24:56,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1861341990, now seen corresponding path program 1 times [2020-10-28 12:24:56,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:24:56,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935274637] [2020-10-28 12:24:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:24:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:56,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:56,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:56,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 12:24:56,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:56,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 767 [2020-10-28 12:24:56,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:56,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:57,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:24:57,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 297 [2020-10-28 12:24:57,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 12:24:57,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:57,249 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:24:57,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:24:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:57,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:57,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:57,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:24:57,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:57,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:24:57,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:57,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:57,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:24:57,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:57,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:24:57,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:57,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:24:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:57,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:57,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:57,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 12:24:57,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-28 12:24:57,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:57,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:24:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:24:57,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:24:57,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-28 12:24:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:57,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:57,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:57,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-28 12:24:57,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:57,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-28 12:24:57,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:57,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:57,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:24:57,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:57,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-28 12:24:57,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:24:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-28 12:24:57,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935274637] [2020-10-28 12:24:57,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:24:57,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 12:24:57,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087085830] [2020-10-28 12:24:57,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 12:24:57,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:24:57,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 12:24:57,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:24:57,946 INFO L87 Difference]: Start difference. First operand 62219 states and 78856 transitions. Second operand 6 states. [2020-10-28 12:25:00,100 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:25:01,404 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-28 12:25:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:25:21,581 INFO L93 Difference]: Finished difference Result 123677 states and 156993 transitions. [2020-10-28 12:25:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 12:25:21,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 313 [2020-10-28 12:25:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:25:22,073 INFO L225 Difference]: With dead ends: 123677 [2020-10-28 12:25:22,074 INFO L226 Difference]: Without dead ends: 62231 [2020-10-28 12:25:22,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:25:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62231 states. [2020-10-28 12:25:23,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62231 to 61451. [2020-10-28 12:25:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61451 states. [2020-10-28 12:25:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61451 states to 61451 states and 74593 transitions. [2020-10-28 12:25:24,184 INFO L78 Accepts]: Start accepts. Automaton has 61451 states and 74593 transitions. Word has length 313 [2020-10-28 12:25:24,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:25:24,185 INFO L481 AbstractCegarLoop]: Abstraction has 61451 states and 74593 transitions. [2020-10-28 12:25:24,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 12:25:24,186 INFO L276 IsEmpty]: Start isEmpty. Operand 61451 states and 74593 transitions. [2020-10-28 12:25:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2020-10-28 12:25:24,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:25:24,228 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:25:24,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 12:25:24,229 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:25:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:25:24,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1120841627, now seen corresponding path program 1 times [2020-10-28 12:25:24,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:25:24,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602732105] [2020-10-28 12:25:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:25:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:24,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:25,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:28,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:28,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 570 [2020-10-28 12:25:28,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:25:28,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3967 [2020-10-28 12:25:28,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:28,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:28,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:25:28,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-28 12:25:28,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 12:25:28,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:25:28,783 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:25:28,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:25:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:28,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:28,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:28,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:25:28,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:25:28,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 12:25:28,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:28,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:28,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:25:28,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:25:28,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:25:28,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:25:28,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:25:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:28,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:29,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:29,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 12:25:29,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:25:29,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-28 12:25:29,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:29,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:29,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:25:29,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:25:29,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-28 12:25:29,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:25:29,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-28 12:25:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:29,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:29,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:29,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 12:25:29,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:25:29,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-28 12:25:29,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:29,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:29,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:25:29,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:25:29,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 12:25:29,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:25:29,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-10-28 12:25:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:29,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:29,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:29,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-28 12:25:29,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:25:29,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-28 12:25:29,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:29,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:29,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:25:29,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-28 12:25:29,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:25:29,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:25:29,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 12:25:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:30,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:30,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:30,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 12:25:30,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:25:30,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 12:25:30,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:30,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:25:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:25:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:25:30,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:25:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 144 proven. 82 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-28 12:25:30,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602732105] [2020-10-28 12:25:30,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:25:30,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:25:30,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497057386] [2020-10-28 12:25:30,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:25:30,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:25:30,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:25:30,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:25:30,444 INFO L87 Difference]: Start difference. First operand 61451 states and 74593 transitions. Second operand 7 states. [2020-10-28 12:25:30,660 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:25:47,080 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:26:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:26:00,546 INFO L93 Difference]: Finished difference Result 153724 states and 192421 transitions. [2020-10-28 12:26:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:26:00,548 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 552 [2020-10-28 12:26:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:26:00,858 INFO L225 Difference]: With dead ends: 153724 [2020-10-28 12:26:00,859 INFO L226 Difference]: Without dead ends: 93046 [2020-10-28 12:26:00,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:26:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93046 states. [2020-10-28 12:26:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93046 to 91437. [2020-10-28 12:26:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91437 states. [2020-10-28 12:26:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91437 states to 91437 states and 113064 transitions. [2020-10-28 12:26:04,327 INFO L78 Accepts]: Start accepts. Automaton has 91437 states and 113064 transitions. Word has length 552 [2020-10-28 12:26:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:26:04,328 INFO L481 AbstractCegarLoop]: Abstraction has 91437 states and 113064 transitions. [2020-10-28 12:26:04,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:26:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 91437 states and 113064 transitions. [2020-10-28 12:26:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2020-10-28 12:26:04,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:26:04,375 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:04,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 12:26:04,375 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:26:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:26:04,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1356778145, now seen corresponding path program 1 times [2020-10-28 12:26:04,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:26:04,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064921543] [2020-10-28 12:26:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:26:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:26:04,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:26:04,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:26:05,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking...