/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/Problem06_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:59:07,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:59:07,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:59:07,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:59:07,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:59:07,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:59:07,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:59:07,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:59:07,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:59:07,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:59:07,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:59:07,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:59:07,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:59:07,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:59:07,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:59:07,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:59:07,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:59:07,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:59:07,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:59:07,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:59:07,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:59:07,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:59:07,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:59:07,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:59:07,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:59:07,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:59:07,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:59:07,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:59:07,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:59:07,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:59:07,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:59:07,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:59:07,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:59:07,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:59:07,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:59:07,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:59:07,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:59:07,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:59:07,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:59:07,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:59:07,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:59:07,148 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 10:59:07,198 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:59:07,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:59:07,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:59:07,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:59:07,203 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:59:07,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:59:07,204 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:59:07,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:59:07,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:59:07,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:59:07,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:59:07,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:59:07,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:59:07,206 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:59:07,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:59:07,206 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:59:07,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:59:07,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:59:07,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:59:07,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:59:07,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:59:07,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:59:07,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:59:07,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:59:07,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:59:07,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:59:07,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:59:07,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:59:07,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:59:07,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:59:07,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:59:07,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:59:07,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:59:07,635 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:59:07,636 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:59:07,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label20.c [2020-10-28 10:59:07,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3dc1d58a/2dde519f1d88475aa2506ab9f843f33c/FLAGca919b3c3 [2020-10-28 10:59:08,951 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:59:08,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label20.c [2020-10-28 10:59:09,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3dc1d58a/2dde519f1d88475aa2506ab9f843f33c/FLAGca919b3c3 [2020-10-28 10:59:09,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3dc1d58a/2dde519f1d88475aa2506ab9f843f33c [2020-10-28 10:59:09,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:59:09,198 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:59:09,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:59:09,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:59:09,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:59:09,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:59:09" (1/1) ... [2020-10-28 10:59:09,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179c13ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:59:09, skipping insertion in model container [2020-10-28 10:59:09,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:59:09" (1/1) ... [2020-10-28 10:59:09,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:59:09,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:59:11,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:59:11,540 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:59:12,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:59:12,756 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:59:12,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:59:12 WrapperNode [2020-10-28 10:59:12,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:59:12,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:59:12,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:59:12,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:59:12,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:59:12" (1/1) ... [2020-10-28 10:59:12,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:59:12" (1/1) ... [2020-10-28 10:59:12,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:59:12" (1/1) ... [2020-10-28 10:59:12,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:59:12" (1/1) ... [2020-10-28 10:59:13,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:59:12" (1/1) ... [2020-10-28 10:59:13,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:59:12" (1/1) ... [2020-10-28 10:59:13,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:59:12" (1/1) ... [2020-10-28 10:59:13,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:59:13,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:59:13,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:59:13,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:59:13,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:59:12" (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 10:59:13,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:59:13,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:59:13,341 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:59:13,341 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:59:13,341 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 10:59:13,341 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 10:59:13,341 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 10:59:13,342 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 10:59:13,342 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:59:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:59:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 10:59:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 10:59:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 10:59:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 10:59:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:59:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:59:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:59:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:59:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:59:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:59:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:59:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:59:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:59:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:59:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:59:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:59:13,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:59:20,933 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:59:20,933 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:59:20,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:59:20 BoogieIcfgContainer [2020-10-28 10:59:20,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:59:20,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:59:20,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:59:20,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:59:20,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:59:09" (1/3) ... [2020-10-28 10:59:20,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb25a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:59:20, skipping insertion in model container [2020-10-28 10:59:20,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:59:12" (2/3) ... [2020-10-28 10:59:20,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb25a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:59:20, skipping insertion in model container [2020-10-28 10:59:20,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:59:20" (3/3) ... [2020-10-28 10:59:20,947 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label20.c [2020-10-28 10:59:20,959 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:59:20,965 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:59:20,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:59:21,013 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:59:21,013 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:59:21,014 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:59:21,014 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:59:21,014 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:59:21,014 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:59:21,014 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:59:21,014 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:59:21,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-28 10:59:21,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 960 [2020-10-28 10:59:21,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:59:21,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:59:21,142 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:59:21,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:59:21,150 INFO L82 PathProgramCache]: Analyzing trace with hash -521709084, now seen corresponding path program 1 times [2020-10-28 10:59:21,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:59:21,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536162714] [2020-10-28 10:59:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:59:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:22,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:24,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:27,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:27,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 977 [2020-10-28 10:59:27,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:59:27,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-28 10:59:27,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:27,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:27,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 10:59:27,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:59:27,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 968 [2020-10-28 10:59:27,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:59:28,579 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:59:28,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:59:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:28,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:28,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:28,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:59:28,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:59:28,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 10:59:28,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:28,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:28,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:59:28,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:59:28,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:59:28,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:59:30,326 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 10:59:30,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536162714] [2020-10-28 10:59:30,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:59:30,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:59:30,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135617988] [2020-10-28 10:59:30,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:59:30,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:59:30,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:59:30,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:59:30,358 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-28 10:59:30,584 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:59:46,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:59:46,261 INFO L93 Difference]: Finished difference Result 3750 states and 6993 transitions. [2020-10-28 10:59:46,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:59:46,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 959 [2020-10-28 10:59:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:59:46,312 INFO L225 Difference]: With dead ends: 3750 [2020-10-28 10:59:46,312 INFO L226 Difference]: Without dead ends: 2367 [2020-10-28 10:59:46,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:59:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2020-10-28 10:59:46,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 2346. [2020-10-28 10:59:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2346 states. [2020-10-28 10:59:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3865 transitions. [2020-10-28 10:59:46,505 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3865 transitions. Word has length 959 [2020-10-28 10:59:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:59:46,509 INFO L481 AbstractCegarLoop]: Abstraction has 2346 states and 3865 transitions. [2020-10-28 10:59:46,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:59:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3865 transitions. [2020-10-28 10:59:46,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 972 [2020-10-28 10:59:46,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:59:46,552 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:59:46,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:59:46,553 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:59:46,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:59:46,554 INFO L82 PathProgramCache]: Analyzing trace with hash -921890549, now seen corresponding path program 1 times [2020-10-28 10:59:46,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:59:46,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446509196] [2020-10-28 10:59:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:59:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:46,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:48,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:51,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:51,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 991 [2020-10-28 10:59:51,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:59:51,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-28 10:59:51,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:51,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:59:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:59:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:59:51,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:59:52,161 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:59:52,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:59:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:52,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:52,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:52,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:59:52,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:59:52,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 10:59:52,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:52,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:59:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:59:52,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:59:52,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:59:52,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:59:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:52,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:52,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:52,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:59:52,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:59:52,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 10:59:52,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:52,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:52,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:59:52,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:59:52,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 10:59:52,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:59:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:59:52,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446509196] [2020-10-28 10:59:52,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:59:52,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:59:52,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030381100] [2020-10-28 10:59:52,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:59:52,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:59:52,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:59:52,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:59:52,925 INFO L87 Difference]: Start difference. First operand 2346 states and 3865 transitions. Second operand 7 states. [2020-10-28 10:59:53,190 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:59:54,211 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 11:00:14,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:00:14,182 INFO L93 Difference]: Finished difference Result 6961 states and 11552 transitions. [2020-10-28 11:00:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:00:14,183 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 971 [2020-10-28 11:00:14,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:00:14,209 INFO L225 Difference]: With dead ends: 6961 [2020-10-28 11:00:14,209 INFO L226 Difference]: Without dead ends: 4621 [2020-10-28 11:00:14,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:00:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4621 states. [2020-10-28 11:00:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4621 to 4505. [2020-10-28 11:00:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4505 states. [2020-10-28 11:00:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 6635 transitions. [2020-10-28 11:00:14,406 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 6635 transitions. Word has length 971 [2020-10-28 11:00:14,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:00:14,407 INFO L481 AbstractCegarLoop]: Abstraction has 4505 states and 6635 transitions. [2020-10-28 11:00:14,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:00:14,407 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 6635 transitions. [2020-10-28 11:00:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2020-10-28 11:00:14,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:00:14,436 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:00:14,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 11:00:14,437 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:00:14,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:00:14,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1887881602, now seen corresponding path program 1 times [2020-10-28 11:00:14,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:00:14,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919693309] [2020-10-28 11:00:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:00:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:14,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:16,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:19,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:19,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 999 [2020-10-28 11:00:19,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:00:19,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 11:00:19,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:19,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:00:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:00:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 11:00:19,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:00:19,953 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:00:19,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:00:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:19,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:20,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:20,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:00:20,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:00:20,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 11:00:20,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:20,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:00:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:00:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:00:20,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:00:20,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:00:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:20,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:20,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:20,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 11:00:20,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:00:20,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-28 11:00:20,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:20,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:20,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:00:20,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:00:20,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 11:00:20,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:00:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:00:20,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919693309] [2020-10-28 11:00:20,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:00:20,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:00:20,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208290069] [2020-10-28 11:00:20,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:00:20,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:00:20,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:00:20,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:00:20,909 INFO L87 Difference]: Start difference. First operand 4505 states and 6635 transitions. Second operand 7 states. [2020-10-28 11:00:21,161 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:00:22,577 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:00:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:00:41,321 INFO L93 Difference]: Finished difference Result 13803 states and 20759 transitions. [2020-10-28 11:00:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:00:41,323 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 979 [2020-10-28 11:00:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:00:41,371 INFO L225 Difference]: With dead ends: 13803 [2020-10-28 11:00:41,371 INFO L226 Difference]: Without dead ends: 9304 [2020-10-28 11:00:41,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:00:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9304 states. [2020-10-28 11:00:41,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9304 to 9057. [2020-10-28 11:00:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9057 states. [2020-10-28 11:00:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9057 states to 9057 states and 12615 transitions. [2020-10-28 11:00:41,636 INFO L78 Accepts]: Start accepts. Automaton has 9057 states and 12615 transitions. Word has length 979 [2020-10-28 11:00:41,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:00:41,637 INFO L481 AbstractCegarLoop]: Abstraction has 9057 states and 12615 transitions. [2020-10-28 11:00:41,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:00:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 9057 states and 12615 transitions. [2020-10-28 11:00:41,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1022 [2020-10-28 11:00:41,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:00:41,671 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:00:41,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 11:00:41,671 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:00:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:00:41,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1737903788, now seen corresponding path program 1 times [2020-10-28 11:00:41,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:00:41,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054417342] [2020-10-28 11:00:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:00:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:41,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:41,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:42,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:46,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:47,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:47,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1043 [2020-10-28 11:00:47,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 11:00:47,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5293 [2020-10-28 11:00:47,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:47,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:47,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:00:47,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:00:47,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 11:00:47,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:00:47,543 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:00:47,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:00:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:47,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:47,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:47,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:00:47,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:00:47,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 11:00:47,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:47,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:47,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:00:47,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:00:47,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:00:47,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:00:47,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:00:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:47,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:47,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:47,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 11:00:47,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:00:47,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-28 11:00:47,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:47,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:47,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:00:47,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:00:47,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 11:00:47,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:00:47,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 11:00:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:47,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:47,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:47,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 11:00:47,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:00:47,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 11:00:47,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:47,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:47,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:00:47,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 11:00:47,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:00:47,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:00:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 11:00:48,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054417342] [2020-10-28 11:00:48,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:00:48,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:00:48,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515239787] [2020-10-28 11:00:48,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:00:48,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:00:48,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:00:48,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:00:48,524 INFO L87 Difference]: Start difference. First operand 9057 states and 12615 transitions. Second operand 7 states. [2020-10-28 11:00:48,785 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:01:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:01:10,565 INFO L93 Difference]: Finished difference Result 27786 states and 39414 transitions. [2020-10-28 11:01:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 11:01:10,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1021 [2020-10-28 11:01:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:01:10,638 INFO L225 Difference]: With dead ends: 27786 [2020-10-28 11:01:10,638 INFO L226 Difference]: Without dead ends: 18735 [2020-10-28 11:01:10,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-28 11:01:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18735 states. [2020-10-28 11:01:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18735 to 18664. [2020-10-28 11:01:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18664 states. [2020-10-28 11:01:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18664 states to 18664 states and 26330 transitions. [2020-10-28 11:01:11,192 INFO L78 Accepts]: Start accepts. Automaton has 18664 states and 26330 transitions. Word has length 1021 [2020-10-28 11:01:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:01:11,193 INFO L481 AbstractCegarLoop]: Abstraction has 18664 states and 26330 transitions. [2020-10-28 11:01:11,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:01:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 18664 states and 26330 transitions. [2020-10-28 11:01:11,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1026 [2020-10-28 11:01:11,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:01:11,255 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:01:11,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 11:01:11,255 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:01:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:01:11,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1074122734, now seen corresponding path program 1 times [2020-10-28 11:01:11,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:01:11,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735552090] [2020-10-28 11:01:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:01:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:11,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:11,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:11,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:16,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:16,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1049 [2020-10-28 11:01:16,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 11:01:16,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-28 11:01:16,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:16,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:16,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:01:16,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 11:01:16,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 11:01:16,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:16,889 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:01:16,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:01:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:16,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:16,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:16,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:01:16,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:16,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 11:01:16,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:16,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:16,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:01:16,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:01:16,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:01:16,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:17,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:01:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:17,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:17,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:17,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 11:01:17,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:17,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 11:01:17,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:17,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:17,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:01:17,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:01:17,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:01:17,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:17,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 11:01:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:17,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:17,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:17,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 11:01:17,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:17,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 11:01:17,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:17,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:17,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:01:17,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:01:17,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 11:01:17,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:17,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 11:01:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:17,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:17,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:17,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 11:01:17,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:17,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 11:01:17,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:17,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:17,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:01:17,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:01:17,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 11:01:17,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 11:01:17,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735552090] [2020-10-28 11:01:17,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:01:17,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:01:17,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229269534] [2020-10-28 11:01:17,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:01:17,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:01:17,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:01:17,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:01:17,912 INFO L87 Difference]: Start difference. First operand 18664 states and 26330 transitions. Second operand 7 states. [2020-10-28 11:01:18,186 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:01:19,613 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:01:39,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:01:39,561 INFO L93 Difference]: Finished difference Result 47805 states and 71611 transitions. [2020-10-28 11:01:39,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 11:01:39,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1025 [2020-10-28 11:01:39,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:01:39,679 INFO L225 Difference]: With dead ends: 47805 [2020-10-28 11:01:39,679 INFO L226 Difference]: Without dead ends: 29147 [2020-10-28 11:01:39,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:01:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29147 states. [2020-10-28 11:01:40,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29147 to 28459. [2020-10-28 11:01:40,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28459 states. [2020-10-28 11:01:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28459 states to 28459 states and 41076 transitions. [2020-10-28 11:01:40,484 INFO L78 Accepts]: Start accepts. Automaton has 28459 states and 41076 transitions. Word has length 1025 [2020-10-28 11:01:40,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:01:40,485 INFO L481 AbstractCegarLoop]: Abstraction has 28459 states and 41076 transitions. [2020-10-28 11:01:40,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:01:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 28459 states and 41076 transitions. [2020-10-28 11:01:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1030 [2020-10-28 11:01:40,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:01:40,581 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:01:40,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 11:01:40,581 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:01:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:01:40,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1132413075, now seen corresponding path program 1 times [2020-10-28 11:01:40,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:01:40,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596963627] [2020-10-28 11:01:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:01:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:40,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:40,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:41,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:45,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:46,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:46,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1053 [2020-10-28 11:01:46,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 11:01:46,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5585 [2020-10-28 11:01:46,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:46,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:46,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:01:46,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 11:01:46,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 11:01:46,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:46,716 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:01:46,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:01:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:46,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:46,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:46,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:01:46,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:46,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 11:01:46,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:46,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:46,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:01:46,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:01:46,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:01:46,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:46,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:01:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:46,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:46,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:46,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 11:01:46,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:46,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 11:01:46,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:46,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:46,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:01:46,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:01:46,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:01:46,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:46,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 11:01:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:46,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:46,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:46,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:01:46,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:46,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 11:01:46,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:46,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:46,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:01:46,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:01:46,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 11:01:46,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:46,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 11:01:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:46,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:47,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:47,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 11:01:47,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:47,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-28 11:01:47,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:47,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:47,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:01:47,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:01:47,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 11:01:47,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 11:01:47,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596963627] [2020-10-28 11:01:47,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:01:47,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:01:47,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580487054] [2020-10-28 11:01:47,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:01:47,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:01:47,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:01:47,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:01:47,745 INFO L87 Difference]: Start difference. First operand 28459 states and 41076 transitions. Second operand 7 states. [2020-10-28 11:01:48,002 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:01:49,172 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 11:02:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:02:07,619 INFO L93 Difference]: Finished difference Result 86032 states and 131296 transitions. [2020-10-28 11:02:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 11:02:07,620 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1029 [2020-10-28 11:02:07,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:02:07,816 INFO L225 Difference]: With dead ends: 86032 [2020-10-28 11:02:07,816 INFO L226 Difference]: Without dead ends: 57579 [2020-10-28 11:02:07,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 11:02:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57579 states. [2020-10-28 11:02:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57579 to 57158. [2020-10-28 11:02:09,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57158 states. [2020-10-28 11:02:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57158 states to 57158 states and 82081 transitions. [2020-10-28 11:02:09,275 INFO L78 Accepts]: Start accepts. Automaton has 57158 states and 82081 transitions. Word has length 1029 [2020-10-28 11:02:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:02:09,276 INFO L481 AbstractCegarLoop]: Abstraction has 57158 states and 82081 transitions. [2020-10-28 11:02:09,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:02:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 57158 states and 82081 transitions. [2020-10-28 11:02:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1037 [2020-10-28 11:02:09,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:02:09,425 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:02:09,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 11:02:09,426 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:02:09,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:02:09,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1826125797, now seen corresponding path program 1 times [2020-10-28 11:02:09,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:02:09,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419770374] [2020-10-28 11:02:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:02:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:09,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:10,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:11,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:14,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:14,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1060 [2020-10-28 11:02:14,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 11:02:14,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5167 [2020-10-28 11:02:14,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:14,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:14,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:02:14,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 11:02:14,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 11:02:14,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:15,130 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:02:15,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:02:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:15,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:15,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:15,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:02:15,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:02:15,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 11:02:15,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:15,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:15,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:02:15,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:02:15,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:02:15,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:15,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:02:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:15,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:15,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:15,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 11:02:15,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:02:15,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 11:02:15,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:15,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:15,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:02:15,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:02:15,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:02:15,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:15,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 11:02:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:15,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:15,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:15,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 11:02:15,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:02:15,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 11:02:15,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:15,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:15,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:02:15,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:02:15,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 11:02:15,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:15,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 11:02:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:15,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:15,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:15,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 11:02:15,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:02:15,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 11:02:15,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:15,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:15,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:02:15,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:02:15,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 11:02:15,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 11:02:16,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419770374] [2020-10-28 11:02:16,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:02:16,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 11:02:16,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008950900] [2020-10-28 11:02:16,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 11:02:16,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:02:16,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 11:02:16,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 11:02:16,310 INFO L87 Difference]: Start difference. First operand 57158 states and 82081 transitions. Second operand 8 states. [2020-10-28 11:02:16,611 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:02:17,245 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:02:20,026 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 159