/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=DEEPEST --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/systemc/mem_slave_tlm.4.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 01:01:05,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 01:01:05,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 01:01:05,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 01:01:05,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 01:01:05,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 01:01:05,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 01:01:05,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 01:01:05,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 01:01:05,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 01:01:05,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 01:01:05,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 01:01:05,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 01:01:05,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 01:01:05,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 01:01:05,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 01:01:05,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 01:01:05,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 01:01:05,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 01:01:05,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 01:01:05,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 01:01:05,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 01:01:05,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 01:01:05,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 01:01:05,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 01:01:05,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 01:01:05,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 01:01:05,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 01:01:05,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 01:01:05,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 01:01:05,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 01:01:05,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 01:01:05,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 01:01:05,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 01:01:05,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 01:01:05,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 01:01:05,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 01:01:05,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 01:01:05,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 01:01:05,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 01:01:05,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 01:01:06,000 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 01:01:06,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 01:01:06,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 01:01:06,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 01:01:06,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 01:01:06,029 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 01:01:06,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 01:01:06,030 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 01:01:06,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 01:01:06,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 01:01:06,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 01:01:06,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 01:01:06,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 01:01:06,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 01:01:06,032 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 01:01:06,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 01:01:06,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 01:01:06,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 01:01:06,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 01:01:06,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 01:01:06,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 01:01:06,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 01:01:06,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 01:01:06,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 01:01:06,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 01:01:06,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 01:01:06,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 01:01:06,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 01:01:06,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 01:01:06,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 01:01:06,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 01:01:06,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 01:01:06,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 01:01:06,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 01:01:06,514 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 01:01:06,515 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 01:01:06,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/mem_slave_tlm.4.cil.c [2020-10-28 01:01:06,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7826151d/98df2a70bd1244a29c68aca48e899819/FLAGa92686f93 [2020-10-28 01:01:07,270 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 01:01:07,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/mem_slave_tlm.4.cil.c [2020-10-28 01:01:07,288 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7826151d/98df2a70bd1244a29c68aca48e899819/FLAGa92686f93 [2020-10-28 01:01:07,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7826151d/98df2a70bd1244a29c68aca48e899819 [2020-10-28 01:01:07,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 01:01:07,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 01:01:07,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 01:01:07,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 01:01:07,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 01:01:07,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:01:07" (1/1) ... [2020-10-28 01:01:07,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10ac07ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:07, skipping insertion in model container [2020-10-28 01:01:07,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:01:07" (1/1) ... [2020-10-28 01:01:07,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 01:01:07,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 01:01:07,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 01:01:07,998 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 01:01:08,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 01:01:08,113 INFO L208 MainTranslator]: Completed translation [2020-10-28 01:01:08,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:08 WrapperNode [2020-10-28 01:01:08,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 01:01:08,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 01:01:08,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 01:01:08,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 01:01:08,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:08" (1/1) ... [2020-10-28 01:01:08,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:08" (1/1) ... [2020-10-28 01:01:08,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:08" (1/1) ... [2020-10-28 01:01:08,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:08" (1/1) ... [2020-10-28 01:01:08,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:08" (1/1) ... [2020-10-28 01:01:08,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:08" (1/1) ... [2020-10-28 01:01:08,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:08" (1/1) ... [2020-10-28 01:01:08,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 01:01:08,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 01:01:08,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 01:01:08,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 01:01:08,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:08" (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 01:01:08,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 01:01:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 01:01:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 01:01:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-10-28 01:01:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_read [2020-10-28 01:01:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_write [2020-10-28 01:01:08,357 INFO L138 BoogieDeclarations]: Found implementation of procedure m_run [2020-10-28 01:01:08,357 INFO L138 BoogieDeclarations]: Found implementation of procedure s_run [2020-10-28 01:01:08,357 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-10-28 01:01:08,357 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-10-28 01:01:08,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 01:01:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 01:01:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 01:01:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 01:01:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 01:01:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 01:01:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-10-28 01:01:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_read [2020-10-28 01:01:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_write [2020-10-28 01:01:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure m_run [2020-10-28 01:01:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure s_run [2020-10-28 01:01:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-10-28 01:01:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-10-28 01:01:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 01:01:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 01:01:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 01:01:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 01:01:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 01:01:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 01:01:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 01:01:09,679 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 01:01:09,679 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-28 01:01:09,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:01:09 BoogieIcfgContainer [2020-10-28 01:01:09,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 01:01:09,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 01:01:09,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 01:01:09,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 01:01:09,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:01:07" (1/3) ... [2020-10-28 01:01:09,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5e6dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:01:09, skipping insertion in model container [2020-10-28 01:01:09,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:08" (2/3) ... [2020-10-28 01:01:09,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5e6dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:01:09, skipping insertion in model container [2020-10-28 01:01:09,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:01:09" (3/3) ... [2020-10-28 01:01:09,692 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.4.cil.c [2020-10-28 01:01:09,706 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 01:01:09,712 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 01:01:09,727 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 01:01:09,782 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 01:01:09,782 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 01:01:09,782 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 01:01:09,782 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 01:01:09,782 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 01:01:09,783 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 01:01:09,783 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 01:01:09,783 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 01:01:09,810 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states. [2020-10-28 01:01:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 01:01:09,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:09,825 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] [2020-10-28 01:01:09,825 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:09,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1951364599, now seen corresponding path program 1 times [2020-10-28 01:01:09,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:09,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130162791] [2020-10-28 01:01:09,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:10,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:10,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:10,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:10,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:11,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:11,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:11,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:12,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:12,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:13,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:13,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:13,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:14,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:15,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:15,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 01:01:15,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 01:01:15,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 01:01:15,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 01:01:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:15,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 01:01:15,488 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:01:15,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:15,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:15,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:15,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:15,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:15,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 01:01:15,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:15,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:15,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:15,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:15,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:15,573 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 01:01:15,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130162791] [2020-10-28 01:01:15,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:15,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 01:01:15,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670868124] [2020-10-28 01:01:15,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 01:01:15,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:15,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 01:01:15,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 01:01:15,608 INFO L87 Difference]: Start difference. First operand 308 states. Second operand 3 states. [2020-10-28 01:01:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:17,376 INFO L93 Difference]: Finished difference Result 636 states and 1129 transitions. [2020-10-28 01:01:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 01:01:17,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-10-28 01:01:17,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:17,397 INFO L225 Difference]: With dead ends: 636 [2020-10-28 01:01:17,397 INFO L226 Difference]: Without dead ends: 347 [2020-10-28 01:01:17,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 01:01:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-28 01:01:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 296. [2020-10-28 01:01:17,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-28 01:01:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 497 transitions. [2020-10-28 01:01:17,500 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 497 transitions. Word has length 40 [2020-10-28 01:01:17,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:17,500 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 497 transitions. [2020-10-28 01:01:17,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 01:01:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 497 transitions. [2020-10-28 01:01:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 01:01:17,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:17,505 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] [2020-10-28 01:01:17,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 01:01:17,506 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1181885652, now seen corresponding path program 1 times [2020-10-28 01:01:17,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:17,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050373151] [2020-10-28 01:01:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:17,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:17,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:17,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:17,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:17,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:18,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:18,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:19,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:19,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:19,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:19,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:19,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:20,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:20,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:22,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:22,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 01:01:22,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 01:01:22,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 01:01:22,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:22,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:01:22,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 01:01:22,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:01:22,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:22,873 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:01:22,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:22,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:22,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:22,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:22,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:22,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 01:01:22,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:22,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:22,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:22,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:22,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:22,917 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 01:01:22,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050373151] [2020-10-28 01:01:22,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:22,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:01:22,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690346714] [2020-10-28 01:01:22,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:01:22,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:22,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:01:22,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:01:22,922 INFO L87 Difference]: Start difference. First operand 296 states and 497 transitions. Second operand 4 states. [2020-10-28 01:01:23,386 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:01:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:25,712 INFO L93 Difference]: Finished difference Result 869 states and 1428 transitions. [2020-10-28 01:01:25,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:01:25,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-28 01:01:25,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:25,722 INFO L225 Difference]: With dead ends: 869 [2020-10-28 01:01:25,722 INFO L226 Difference]: Without dead ends: 599 [2020-10-28 01:01:25,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:01:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-10-28 01:01:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 531. [2020-10-28 01:01:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-10-28 01:01:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 869 transitions. [2020-10-28 01:01:25,813 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 869 transitions. Word has length 41 [2020-10-28 01:01:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:25,814 INFO L481 AbstractCegarLoop]: Abstraction has 531 states and 869 transitions. [2020-10-28 01:01:25,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:01:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 869 transitions. [2020-10-28 01:01:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 01:01:25,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:25,819 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] [2020-10-28 01:01:25,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 01:01:25,820 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:25,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:25,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1987333408, now seen corresponding path program 1 times [2020-10-28 01:01:25,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:25,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421865450] [2020-10-28 01:01:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:25,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:25,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:25,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:26,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:26,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:26,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:26,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:26,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:26,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:27,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:27,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:27,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:28,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:28,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:30,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:30,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 01:01:30,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 01:01:30,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 01:01:30,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:30,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:01:30,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 01:01:30,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 01:01:30,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 01:01:31,134 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:01:31,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:31,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:31,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:31,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:31,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:31,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 01:01:31,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:31,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:31,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:31,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:31,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:31,166 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 01:01:31,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421865450] [2020-10-28 01:01:31,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:31,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:01:31,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499446489] [2020-10-28 01:01:31,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:01:31,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:31,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:01:31,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:01:31,169 INFO L87 Difference]: Start difference. First operand 531 states and 869 transitions. Second operand 4 states. [2020-10-28 01:01:31,513 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:01:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:34,034 INFO L93 Difference]: Finished difference Result 1585 states and 2579 transitions. [2020-10-28 01:01:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:01:34,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 01:01:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:34,046 INFO L225 Difference]: With dead ends: 1585 [2020-10-28 01:01:34,046 INFO L226 Difference]: Without dead ends: 1085 [2020-10-28 01:01:34,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 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 01:01:34,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2020-10-28 01:01:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 979. [2020-10-28 01:01:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 979 states. [2020-10-28 01:01:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1571 transitions. [2020-10-28 01:01:34,193 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1571 transitions. Word has length 43 [2020-10-28 01:01:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:34,194 INFO L481 AbstractCegarLoop]: Abstraction has 979 states and 1571 transitions. [2020-10-28 01:01:34,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:01:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1571 transitions. [2020-10-28 01:01:34,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 01:01:34,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:34,201 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] [2020-10-28 01:01:34,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 01:01:34,202 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:34,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1304424311, now seen corresponding path program 1 times [2020-10-28 01:01:34,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:34,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512324455] [2020-10-28 01:01:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:34,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:34,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:34,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:34,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:34,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:34,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:34,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:35,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:35,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:35,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:36,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:37,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:37,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:37,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:37,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:39,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:39,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 01:01:39,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 01:01:39,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 01:01:39,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:39,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 01:01:39,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 01:01:39,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 01:01:39,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:39,542 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:01:39,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:39,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:39,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:39,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:39,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:39,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 01:01:39,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:39,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:39,587 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 01:01:39,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512324455] [2020-10-28 01:01:39,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:39,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:01:39,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791140848] [2020-10-28 01:01:39,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:01:39,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:01:39,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:01:39,593 INFO L87 Difference]: Start difference. First operand 979 states and 1571 transitions. Second operand 4 states. [2020-10-28 01:01:39,939 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 01:01:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:42,203 INFO L93 Difference]: Finished difference Result 2463 states and 3991 transitions. [2020-10-28 01:01:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:01:42,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 01:01:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:42,222 INFO L225 Difference]: With dead ends: 2463 [2020-10-28 01:01:42,223 INFO L226 Difference]: Without dead ends: 1497 [2020-10-28 01:01:42,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:01:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2020-10-28 01:01:42,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1365. [2020-10-28 01:01:42,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1365 states. [2020-10-28 01:01:42,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2109 transitions. [2020-10-28 01:01:42,384 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2109 transitions. Word has length 43 [2020-10-28 01:01:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:42,386 INFO L481 AbstractCegarLoop]: Abstraction has 1365 states and 2109 transitions. [2020-10-28 01:01:42,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:01:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2109 transitions. [2020-10-28 01:01:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 01:01:42,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:42,393 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] [2020-10-28 01:01:42,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 01:01:42,393 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:42,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:42,395 INFO L82 PathProgramCache]: Analyzing trace with hash 234183271, now seen corresponding path program 1 times [2020-10-28 01:01:42,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:42,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551290266] [2020-10-28 01:01:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:42,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:42,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:42,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:42,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:42,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:42,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:43,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:43,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:43,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:43,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:43,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:44,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:44,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:45,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:45,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:47,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:47,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 01:01:47,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 01:01:47,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 01:01:47,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 01:01:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 01:01:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 01:01:47,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:47,702 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:01:47,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:47,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:47,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:47,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:47,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:47,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 01:01:47,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:47,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:47,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:47,743 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 01:01:47,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551290266] [2020-10-28 01:01:47,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:47,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:01:47,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924815931] [2020-10-28 01:01:47,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:01:47,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:47,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:01:47,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:01:47,746 INFO L87 Difference]: Start difference. First operand 1365 states and 2109 transitions. Second operand 4 states. [2020-10-28 01:01:48,144 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:01:50,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:50,541 INFO L93 Difference]: Finished difference Result 3226 states and 5080 transitions. [2020-10-28 01:01:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:01:50,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-28 01:01:50,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:50,556 INFO L225 Difference]: With dead ends: 3226 [2020-10-28 01:01:50,556 INFO L226 Difference]: Without dead ends: 1894 [2020-10-28 01:01:50,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:01:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2020-10-28 01:01:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1745. [2020-10-28 01:01:50,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1745 states. [2020-10-28 01:01:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2632 transitions. [2020-10-28 01:01:50,742 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2632 transitions. Word has length 44 [2020-10-28 01:01:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:50,742 INFO L481 AbstractCegarLoop]: Abstraction has 1745 states and 2632 transitions. [2020-10-28 01:01:50,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:01:50,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2632 transitions. [2020-10-28 01:01:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 01:01:50,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:50,750 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] [2020-10-28 01:01:50,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 01:01:50,750 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:50,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1072452977, now seen corresponding path program 1 times [2020-10-28 01:01:50,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:50,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510979613] [2020-10-28 01:01:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:50,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:50,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:50,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:51,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:51,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:51,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:51,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:51,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:54,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:54,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 01:01:54,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 01:01:54,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3810 [2020-10-28 01:01:54,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:54,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:01:54,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 01:01:54,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 01:01:54,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:54,806 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:01:54,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:54,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:54,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:54,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:54,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:54,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 01:01:54,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:54,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:54,833 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 01:01:54,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510979613] [2020-10-28 01:01:54,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:54,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:01:54,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957509139] [2020-10-28 01:01:54,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:01:54,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:54,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:01:54,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:01:54,836 INFO L87 Difference]: Start difference. First operand 1745 states and 2632 transitions. Second operand 4 states. [2020-10-28 01:01:55,039 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:01:57,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:57,275 INFO L93 Difference]: Finished difference Result 4924 states and 7512 transitions. [2020-10-28 01:01:57,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:01:57,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-28 01:01:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:57,298 INFO L225 Difference]: With dead ends: 4924 [2020-10-28 01:01:57,298 INFO L226 Difference]: Without dead ends: 3233 [2020-10-28 01:01:57,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 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 01:01:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3233 states. [2020-10-28 01:01:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3233 to 2988. [2020-10-28 01:01:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2988 states. [2020-10-28 01:01:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 4497 transitions. [2020-10-28 01:01:57,588 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 4497 transitions. Word has length 45 [2020-10-28 01:01:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:57,588 INFO L481 AbstractCegarLoop]: Abstraction has 2988 states and 4497 transitions. [2020-10-28 01:01:57,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:01:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 4497 transitions. [2020-10-28 01:01:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 01:01:57,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:57,598 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] [2020-10-28 01:01:57,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 01:01:57,598 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:57,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:57,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1960031555, now seen corresponding path program 1 times [2020-10-28 01:01:57,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:57,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638564480] [2020-10-28 01:01:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:57,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:57,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:57,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:57,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:57,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:57,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:58,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:58,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:58,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:58,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:58,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:00,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:00,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 01:02:00,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 01:02:00,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3315 [2020-10-28 01:02:00,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 01:02:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 01:02:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 01:02:00,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:01,173 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:01,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:01,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:01,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:01,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:01,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:01,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 01:02:01,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:01,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:01,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:01,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:01,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:01,201 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 01:02:01,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638564480] [2020-10-28 01:02:01,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:01,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:02:01,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990117323] [2020-10-28 01:02:01,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:02:01,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:01,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:02:01,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:02:01,204 INFO L87 Difference]: Start difference. First operand 2988 states and 4497 transitions. Second operand 4 states. [2020-10-28 01:02:01,389 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:02:02,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:02,882 INFO L93 Difference]: Finished difference Result 5582 states and 8358 transitions. [2020-10-28 01:02:02,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:02:02,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-28 01:02:02,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:02,902 INFO L225 Difference]: With dead ends: 5582 [2020-10-28 01:02:02,902 INFO L226 Difference]: Without dead ends: 3213 [2020-10-28 01:02:02,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 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 01:02:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2020-10-28 01:02:03,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 2988. [2020-10-28 01:02:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2988 states. [2020-10-28 01:02:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 4433 transitions. [2020-10-28 01:02:03,224 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 4433 transitions. Word has length 45 [2020-10-28 01:02:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:03,224 INFO L481 AbstractCegarLoop]: Abstraction has 2988 states and 4433 transitions. [2020-10-28 01:02:03,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:02:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 4433 transitions. [2020-10-28 01:02:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 01:02:03,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:03,233 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] [2020-10-28 01:02:03,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 01:02:03,233 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1147269687, now seen corresponding path program 1 times [2020-10-28 01:02:03,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:03,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615467811] [2020-10-28 01:02:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:03,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:03,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:03,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:03,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:03,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:04,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:05,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:05,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 01:02:05,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 01:02:05,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2646 [2020-10-28 01:02:05,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:05,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 01:02:05,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 01:02:05,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 01:02:05,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:06,151 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:06,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:06,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:06,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:06,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:06,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:06,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:02:06,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:06,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:06,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:06,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:06,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:06,173 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 01:02:06,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615467811] [2020-10-28 01:02:06,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:06,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:02:06,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833849086] [2020-10-28 01:02:06,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:02:06,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:06,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:02:06,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:02:06,176 INFO L87 Difference]: Start difference. First operand 2988 states and 4433 transitions. Second operand 4 states. [2020-10-28 01:02:06,368 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:02:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:08,387 INFO L93 Difference]: Finished difference Result 7362 states and 11567 transitions. [2020-10-28 01:02:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:02:08,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-28 01:02:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:08,416 INFO L225 Difference]: With dead ends: 7362 [2020-10-28 01:02:08,417 INFO L226 Difference]: Without dead ends: 4473 [2020-10-28 01:02:08,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 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 01:02:08,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2020-10-28 01:02:08,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 4087. [2020-10-28 01:02:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4087 states. [2020-10-28 01:02:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 6381 transitions. [2020-10-28 01:02:08,950 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 6381 transitions. Word has length 46 [2020-10-28 01:02:08,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:08,951 INFO L481 AbstractCegarLoop]: Abstraction has 4087 states and 6381 transitions. [2020-10-28 01:02:08,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:02:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 6381 transitions. [2020-10-28 01:02:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 01:02:08,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:08,958 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] [2020-10-28 01:02:08,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 01:02:08,958 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:08,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:08,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2135192051, now seen corresponding path program 1 times [2020-10-28 01:02:08,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:08,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20002483] [2020-10-28 01:02:08,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:08,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:09,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:09,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:09,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:09,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:09,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:09,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:09,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:09,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:09,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:09,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:09,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:10,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:10,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:10,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:13,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:13,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 01:02:13,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 01:02:13,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 01:02:13,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:13,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:02:13,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 01:02:13,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 01:02:13,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:14,257 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:14,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:14,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:14,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:14,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:14,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:14,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 01:02:14,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:14,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:14,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:14,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:14,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:14,285 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 01:02:14,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20002483] [2020-10-28 01:02:14,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:14,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:02:14,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780936915] [2020-10-28 01:02:14,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:02:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:02:14,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:02:14,287 INFO L87 Difference]: Start difference. First operand 4087 states and 6381 transitions. Second operand 4 states. [2020-10-28 01:02:14,515 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:02:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:16,735 INFO L93 Difference]: Finished difference Result 8715 states and 14141 transitions. [2020-10-28 01:02:16,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:02:16,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-28 01:02:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:16,770 INFO L225 Difference]: With dead ends: 8715 [2020-10-28 01:02:16,771 INFO L226 Difference]: Without dead ends: 5447 [2020-10-28 01:02:16,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:02:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5447 states. [2020-10-28 01:02:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5447 to 5025. [2020-10-28 01:02:17,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5025 states. [2020-10-28 01:02:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 7823 transitions. [2020-10-28 01:02:17,354 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 7823 transitions. Word has length 47 [2020-10-28 01:02:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:17,355 INFO L481 AbstractCegarLoop]: Abstraction has 5025 states and 7823 transitions. [2020-10-28 01:02:17,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:02:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 7823 transitions. [2020-10-28 01:02:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 01:02:17,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:17,362 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] [2020-10-28 01:02:17,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 01:02:17,362 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:17,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:17,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1509899309, now seen corresponding path program 1 times [2020-10-28 01:02:17,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:17,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459390370] [2020-10-28 01:02:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:17,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:17,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:17,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:17,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:17,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:17,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:17,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:18,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:18,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:20,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:20,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 01:02:20,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 01:02:20,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3406 [2020-10-28 01:02:20,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:20,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:02:20,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 01:02:20,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 01:02:20,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:21,006 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:21,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:21,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:21,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:21,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:21,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:21,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 01:02:21,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:21,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:21,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:21,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:21,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:21,030 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 01:02:21,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459390370] [2020-10-28 01:02:21,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:21,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:02:21,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478898920] [2020-10-28 01:02:21,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:02:21,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:21,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:02:21,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:02:21,032 INFO L87 Difference]: Start difference. First operand 5025 states and 7823 transitions. Second operand 4 states. [2020-10-28 01:02:21,387 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:02:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:23,894 INFO L93 Difference]: Finished difference Result 9555 states and 15424 transitions. [2020-10-28 01:02:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:02:23,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-28 01:02:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:23,933 INFO L225 Difference]: With dead ends: 9555 [2020-10-28 01:02:23,934 INFO L226 Difference]: Without dead ends: 5363 [2020-10-28 01:02:23,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 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 01:02:23,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5363 states. [2020-10-28 01:02:24,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5363 to 4981. [2020-10-28 01:02:24,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4981 states. [2020-10-28 01:02:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4981 states to 4981 states and 7723 transitions. [2020-10-28 01:02:24,536 INFO L78 Accepts]: Start accepts. Automaton has 4981 states and 7723 transitions. Word has length 49 [2020-10-28 01:02:24,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:24,536 INFO L481 AbstractCegarLoop]: Abstraction has 4981 states and 7723 transitions. [2020-10-28 01:02:24,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:02:24,536 INFO L276 IsEmpty]: Start isEmpty. Operand 4981 states and 7723 transitions. [2020-10-28 01:02:24,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 01:02:24,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:24,543 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] [2020-10-28 01:02:24,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 01:02:24,543 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:24,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1541052470, now seen corresponding path program 1 times [2020-10-28 01:02:24,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:24,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890906162] [2020-10-28 01:02:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:24,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:24,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:24,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:24,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:25,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:25,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:25,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:25,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:25,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:25,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:26,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:26,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 01:02:26,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 01:02:26,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2085 [2020-10-28 01:02:26,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:26,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 01:02:26,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 01:02:26,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 01:02:26,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:26,957 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:26,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:26,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:26,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:26,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:26,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:26,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:02:26,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:26,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:26,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:26,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:26,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:26,981 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 01:02:26,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890906162] [2020-10-28 01:02:26,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:26,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:02:26,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516685931] [2020-10-28 01:02:26,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:02:26,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:26,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:02:26,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:02:26,984 INFO L87 Difference]: Start difference. First operand 4981 states and 7723 transitions. Second operand 4 states. [2020-10-28 01:02:27,208 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 01:02:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:29,544 INFO L93 Difference]: Finished difference Result 9227 states and 14847 transitions. [2020-10-28 01:02:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:02:29,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-28 01:02:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:29,569 INFO L225 Difference]: With dead ends: 9227 [2020-10-28 01:02:29,569 INFO L226 Difference]: Without dead ends: 5061 [2020-10-28 01:02:29,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 2 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 01:02:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5061 states. [2020-10-28 01:02:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5061 to 4679. [2020-10-28 01:02:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4679 states. [2020-10-28 01:02:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 7223 transitions. [2020-10-28 01:02:30,084 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 7223 transitions. Word has length 50 [2020-10-28 01:02:30,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:30,084 INFO L481 AbstractCegarLoop]: Abstraction has 4679 states and 7223 transitions. [2020-10-28 01:02:30,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:02:30,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 7223 transitions. [2020-10-28 01:02:30,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 01:02:30,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:30,090 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] [2020-10-28 01:02:30,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 01:02:30,091 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:30,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:30,091 INFO L82 PathProgramCache]: Analyzing trace with hash 197343934, now seen corresponding path program 1 times [2020-10-28 01:02:30,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:30,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172777718] [2020-10-28 01:02:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:30,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:30,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:30,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:30,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:30,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:30,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:30,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:30,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:30,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:30,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:30,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:31,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:31,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:31,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:31,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:35,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:35,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 01:02:35,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 01:02:35,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 01:02:35,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:35,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:02:35,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 01:02:35,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 01:02:35,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:35,329 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:35,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:35,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:35,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:35,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:35,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:35,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:02:35,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:35,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:35,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:35,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:35,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:35,349 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 01:02:35,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172777718] [2020-10-28 01:02:35,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:35,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:02:35,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153970996] [2020-10-28 01:02:35,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:02:35,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:35,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:02:35,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:02:35,351 INFO L87 Difference]: Start difference. First operand 4679 states and 7223 transitions. Second operand 4 states. [2020-10-28 01:02:35,565 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:02:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:37,408 INFO L93 Difference]: Finished difference Result 9643 states and 15691 transitions. [2020-10-28 01:02:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:02:37,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-28 01:02:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:37,433 INFO L225 Difference]: With dead ends: 9643 [2020-10-28 01:02:37,433 INFO L226 Difference]: Without dead ends: 5039 [2020-10-28 01:02:37,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 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 01:02:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5039 states. [2020-10-28 01:02:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5039 to 4679. [2020-10-28 01:02:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4679 states. [2020-10-28 01:02:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 7133 transitions. [2020-10-28 01:02:37,965 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 7133 transitions. Word has length 50 [2020-10-28 01:02:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:37,965 INFO L481 AbstractCegarLoop]: Abstraction has 4679 states and 7133 transitions. [2020-10-28 01:02:37,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:02:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 7133 transitions. [2020-10-28 01:02:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 01:02:37,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:37,973 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] [2020-10-28 01:02:37,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 01:02:37,973 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:37,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:37,973 INFO L82 PathProgramCache]: Analyzing trace with hash -146334347, now seen corresponding path program 1 times [2020-10-28 01:02:37,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:37,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118528104] [2020-10-28 01:02:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:38,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:38,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:38,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:38,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:38,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:38,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:38,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:38,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:38,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:38,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:40,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:40,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 01:02:40,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 01:02:40,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2862 [2020-10-28 01:02:40,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:40,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:02:40,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 01:02:40,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 01:02:40,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:41,076 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:41,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:41,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:41,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:41,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:41,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:41,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:02:41,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:41,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:41,098 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 01:02:41,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118528104] [2020-10-28 01:02:41,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:41,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:02:41,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443971152] [2020-10-28 01:02:41,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:02:41,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:41,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:02:41,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:02:41,101 INFO L87 Difference]: Start difference. First operand 4679 states and 7133 transitions. Second operand 4 states. [2020-10-28 01:02:41,533 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:02:44,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:44,026 INFO L93 Difference]: Finished difference Result 7819 states and 13211 transitions. [2020-10-28 01:02:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:02:44,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-28 01:02:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:44,063 INFO L225 Difference]: With dead ends: 7819 [2020-10-28 01:02:44,063 INFO L226 Difference]: Without dead ends: 7814 [2020-10-28 01:02:44,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:02:44,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7814 states. [2020-10-28 01:02:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7814 to 7139. [2020-10-28 01:02:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7139 states. [2020-10-28 01:02:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7139 states to 7139 states and 12261 transitions. [2020-10-28 01:02:45,061 INFO L78 Accepts]: Start accepts. Automaton has 7139 states and 12261 transitions. Word has length 50 [2020-10-28 01:02:45,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:45,062 INFO L481 AbstractCegarLoop]: Abstraction has 7139 states and 12261 transitions. [2020-10-28 01:02:45,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:02:45,062 INFO L276 IsEmpty]: Start isEmpty. Operand 7139 states and 12261 transitions. [2020-10-28 01:02:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 01:02:45,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:45,068 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] [2020-10-28 01:02:45,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 01:02:45,069 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:45,069 INFO L82 PathProgramCache]: Analyzing trace with hash -33839498, now seen corresponding path program 1 times [2020-10-28 01:02:45,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:45,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335943537] [2020-10-28 01:02:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:45,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:46,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:48,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:48,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 01:02:48,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 01:02:48,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3604 [2020-10-28 01:02:48,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:48,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 01:02:48,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 01:02:48,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 01:02:48,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:48,960 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:48,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:48,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:48,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:48,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:48,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:48,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:02:48,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:48,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:48,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:48,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:48,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:48,987 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 01:02:48,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335943537] [2020-10-28 01:02:48,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:48,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:02:48,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53937469] [2020-10-28 01:02:48,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:02:48,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:48,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:02:48,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:02:48,988 INFO L87 Difference]: Start difference. First operand 7139 states and 12261 transitions. Second operand 4 states. [2020-10-28 01:02:49,205 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:02:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:51,737 INFO L93 Difference]: Finished difference Result 14075 states and 24113 transitions. [2020-10-28 01:02:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:02:51,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-28 01:02:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:51,777 INFO L225 Difference]: With dead ends: 14075 [2020-10-28 01:02:51,777 INFO L226 Difference]: Without dead ends: 7709 [2020-10-28 01:02:51,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 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 01:02:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7709 states. [2020-10-28 01:02:52,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7709 to 6605. [2020-10-28 01:02:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6605 states. [2020-10-28 01:02:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6605 states to 6605 states and 10902 transitions. [2020-10-28 01:02:52,737 INFO L78 Accepts]: Start accepts. Automaton has 6605 states and 10902 transitions. Word has length 51 [2020-10-28 01:02:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:52,737 INFO L481 AbstractCegarLoop]: Abstraction has 6605 states and 10902 transitions. [2020-10-28 01:02:52,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:02:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 6605 states and 10902 transitions. [2020-10-28 01:02:52,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 01:02:52,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:52,743 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] [2020-10-28 01:02:52,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 01:02:52,744 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:52,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1447111375, now seen corresponding path program 1 times [2020-10-28 01:02:52,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:52,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704076501] [2020-10-28 01:02:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:52,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:52,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:53,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:53,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 01:02:53,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 01:02:53,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-28 01:02:53,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:02:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 01:02:53,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 01:02:53,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:53,482 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:53,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:53,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:53,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:53,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:53,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:53,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 01:02:53,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:53,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:53,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:53,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:53,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:53,511 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 01:02:53,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704076501] [2020-10-28 01:02:53,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:53,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:02:53,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031075214] [2020-10-28 01:02:53,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:02:53,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:53,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:02:53,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:02:53,514 INFO L87 Difference]: Start difference. First operand 6605 states and 10902 transitions. Second operand 4 states. [2020-10-28 01:02:53,834 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 01:02:55,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:55,704 INFO L93 Difference]: Finished difference Result 14708 states and 25781 transitions. [2020-10-28 01:02:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:02:55,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-28 01:02:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:55,746 INFO L225 Difference]: With dead ends: 14708 [2020-10-28 01:02:55,746 INFO L226 Difference]: Without dead ends: 8136 [2020-10-28 01:02:55,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:02:55,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8136 states. [2020-10-28 01:02:56,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8136 to 6677. [2020-10-28 01:02:56,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6677 states. [2020-10-28 01:02:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6677 states to 6677 states and 10996 transitions. [2020-10-28 01:02:56,716 INFO L78 Accepts]: Start accepts. Automaton has 6677 states and 10996 transitions. Word has length 78 [2020-10-28 01:02:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:56,717 INFO L481 AbstractCegarLoop]: Abstraction has 6677 states and 10996 transitions. [2020-10-28 01:02:56,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:02:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 6677 states and 10996 transitions. [2020-10-28 01:02:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 01:02:56,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:56,720 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] [2020-10-28 01:02:56,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 01:02:56,720 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1148409490, now seen corresponding path program 1 times [2020-10-28 01:02:56,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:56,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71029371] [2020-10-28 01:02:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:56,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:56,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:56,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:56,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:57,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:57,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:57,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 01:02:57,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 01:02:57,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1195 [2020-10-28 01:02:57,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:57,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:02:57,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 01:02:57,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 01:02:57,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:58,165 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:58,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:58,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:58,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:58,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:58,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:58,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:02:58,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:58,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:58,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:58,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:58,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:58,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 01:02:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:58,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:58,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:58,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 01:02:58,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:58,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 01:02:58,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:58,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 01:02:58,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:58,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 01:02:58,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:58,309 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 01:02:58,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71029371] [2020-10-28 01:02:58,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:58,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 01:02:58,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107857726] [2020-10-28 01:02:58,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 01:02:58,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:58,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 01:02:58,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 01:02:58,312 INFO L87 Difference]: Start difference. First operand 6677 states and 10996 transitions. Second operand 7 states. [2020-10-28 01:02:58,858 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 01:02:59,416 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:03:01,185 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 01:03:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:03:02,700 INFO L93 Difference]: Finished difference Result 18722 states and 35607 transitions. [2020-10-28 01:03:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 01:03:02,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-28 01:03:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:03:02,769 INFO L225 Difference]: With dead ends: 18722 [2020-10-28 01:03:02,769 INFO L226 Difference]: Without dead ends: 12828 [2020-10-28 01:03:02,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 01:03:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12828 states. [2020-10-28 01:03:04,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12828 to 11953. [2020-10-28 01:03:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11953 states. [2020-10-28 01:03:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11953 states to 11953 states and 21667 transitions. [2020-10-28 01:03:04,588 INFO L78 Accepts]: Start accepts. Automaton has 11953 states and 21667 transitions. Word has length 82 [2020-10-28 01:03:04,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:03:04,589 INFO L481 AbstractCegarLoop]: Abstraction has 11953 states and 21667 transitions. [2020-10-28 01:03:04,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 01:03:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 11953 states and 21667 transitions. [2020-10-28 01:03:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 01:03:04,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:03:04,593 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] [2020-10-28 01:03:04,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 01:03:04,593 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:03:04,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:03:04,593 INFO L82 PathProgramCache]: Analyzing trace with hash -660676905, now seen corresponding path program 1 times [2020-10-28 01:03:04,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:03:04,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008748583] [2020-10-28 01:03:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:03:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:04,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:04,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:04,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:04,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:05,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:05,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 01:03:05,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 01:03:05,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-28 01:03:05,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:05,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 01:03:05,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 01:03:05,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 01:03:05,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:06,009 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:03:06,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:03:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:06,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:06,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:06,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:03:06,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:06,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:03:06,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:06,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:06,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:06,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:06,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:06,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 01:03:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:06,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:06,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:06,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 01:03:06,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:06,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 01:03:06,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:06,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:03:06,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:06,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 01:03:06,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:06,182 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 01:03:06,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008748583] [2020-10-28 01:03:06,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:03:06,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 01:03:06,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482960716] [2020-10-28 01:03:06,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 01:03:06,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:03:06,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 01:03:06,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 01:03:06,185 INFO L87 Difference]: Start difference. First operand 11953 states and 21667 transitions. Second operand 10 states. [2020-10-28 01:03:06,418 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:03:06,864 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 01:03:07,166 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 01:03:08,319 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 01:03:08,569 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 01:03:10,335 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 01:03:10,706 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 01:03:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:03:12,978 INFO L93 Difference]: Finished difference Result 30041 states and 64554 transitions. [2020-10-28 01:03:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 01:03:12,978 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-28 01:03:12,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:03:13,091 INFO L225 Difference]: With dead ends: 30041 [2020-10-28 01:03:13,092 INFO L226 Difference]: Without dead ends: 18951 [2020-10-28 01:03:13,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-28 01:03:13,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18951 states. [2020-10-28 01:03:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18951 to 16475. [2020-10-28 01:03:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16475 states. [2020-10-28 01:03:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16475 states to 16475 states and 33611 transitions. [2020-10-28 01:03:16,824 INFO L78 Accepts]: Start accepts. Automaton has 16475 states and 33611 transitions. Word has length 83 [2020-10-28 01:03:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:03:16,825 INFO L481 AbstractCegarLoop]: Abstraction has 16475 states and 33611 transitions. [2020-10-28 01:03:16,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 01:03:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 16475 states and 33611 transitions. [2020-10-28 01:03:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 01:03:16,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:03:16,831 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 01:03:16,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 01:03:16,832 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:03:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:03:16,832 INFO L82 PathProgramCache]: Analyzing trace with hash 549619660, now seen corresponding path program 1 times [2020-10-28 01:03:16,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:03:16,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34612017] [2020-10-28 01:03:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:03:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:16,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:16,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:16,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:16,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:17,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:17,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:17,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:18,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:21,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:21,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 01:03:21,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 01:03:21,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 01:03:21,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:03:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 01:03:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 01:03:21,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:22,111 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:03:22,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:03:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:22,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:22,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:22,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:03:22,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:22,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:03:22,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:22,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:22,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 01:03:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:22,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:22,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:22,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 01:03:22,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:22,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 01:03:22,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:22,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:22,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:22,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:22,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:22,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 01:03:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:22,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:22,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:22,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 01:03:22,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 01:03:22,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:03:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 01:03:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 01:03:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 01:03:22,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34612017] [2020-10-28 01:03:22,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:03:22,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 01:03:22,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180068944] [2020-10-28 01:03:22,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 01:03:22,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:03:22,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 01:03:22,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 01:03:22,265 INFO L87 Difference]: Start difference. First operand 16475 states and 33611 transitions. Second operand 6 states. [2020-10-28 01:03:22,598 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 01:03:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:03:29,308 INFO L93 Difference]: Finished difference Result 50663 states and 115213 transitions. [2020-10-28 01:03:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 01:03:29,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-10-28 01:03:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:03:29,848 INFO L225 Difference]: With dead ends: 50663 [2020-10-28 01:03:29,848 INFO L226 Difference]: Without dead ends: 34145 [2020-10-28 01:03:30,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 01:03:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34145 states. [2020-10-28 01:03:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34145 to 28515. [2020-10-28 01:03:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28515 states. [2020-10-28 01:03:36,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28515 states to 28515 states and 57742 transitions. [2020-10-28 01:03:36,276 INFO L78 Accepts]: Start accepts. Automaton has 28515 states and 57742 transitions. Word has length 93 [2020-10-28 01:03:36,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:03:36,277 INFO L481 AbstractCegarLoop]: Abstraction has 28515 states and 57742 transitions. [2020-10-28 01:03:36,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 01:03:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 28515 states and 57742 transitions. [2020-10-28 01:03:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 01:03:36,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:03:36,291 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 01:03:36,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 01:03:36,291 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:03:36,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:03:36,291 INFO L82 PathProgramCache]: Analyzing trace with hash -772027863, now seen corresponding path program 1 times [2020-10-28 01:03:36,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:03:36,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491814521] [2020-10-28 01:03:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:03:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:36,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:36,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:36,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:36,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:37,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:37,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:40,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:41,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:41,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 01:03:41,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 01:03:41,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 01:03:41,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:03:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 01:03:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 01:03:41,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:41,525 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:03:41,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:03:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:41,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:41,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:41,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:03:41,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:41,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 01:03:41,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:41,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:41,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 01:03:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:41,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:41,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:41,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 01:03:41,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:41,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 01:03:41,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:03:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 01:03:41,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:41,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 01:03:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:41,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:41,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:41,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 01:03:41,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:41,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:03:41,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:41,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:41,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 01:03:41,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:41,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 01:03:41,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491814521] [2020-10-28 01:03:41,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 01:03:41,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 01:03:41,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067220251] [2020-10-28 01:03:41,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 01:03:41,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:03:41,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 01:03:41,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:03:41,663 INFO L87 Difference]: Start difference. First operand 28515 states and 57742 transitions. Second operand 5 states. [2020-10-28 01:03:41,926 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:03:47,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:03:47,486 INFO L93 Difference]: Finished difference Result 58043 states and 125923 transitions. [2020-10-28 01:03:47,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 01:03:47,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 94 [2020-10-28 01:03:47,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:03:47,726 INFO L225 Difference]: With dead ends: 58043 [2020-10-28 01:03:47,726 INFO L226 Difference]: Without dead ends: 29035 [2020-10-28 01:03:48,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 01:03:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29035 states. [2020-10-28 01:03:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29035 to 28176. [2020-10-28 01:03:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28176 states. [2020-10-28 01:03:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28176 states to 28176 states and 54024 transitions. [2020-10-28 01:03:53,695 INFO L78 Accepts]: Start accepts. Automaton has 28176 states and 54024 transitions. Word has length 94 [2020-10-28 01:03:53,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:03:53,695 INFO L481 AbstractCegarLoop]: Abstraction has 28176 states and 54024 transitions. [2020-10-28 01:03:53,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 01:03:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 28176 states and 54024 transitions. [2020-10-28 01:03:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 01:03:53,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:03:53,706 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2020-10-28 01:03:53,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 01:03:53,707 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:03:53,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:03:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash 777206366, now seen corresponding path program 1 times [2020-10-28 01:03:53,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:03:53,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925291487] [2020-10-28 01:03:53,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:03:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:53,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:53,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:53,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:53,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:54,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:55,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:55,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:55,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:56,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:56,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:56,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:56,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:56,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:56,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:56,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:56,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:58,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:58,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 01:03:58,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 01:03:58,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 01:03:58,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:03:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-28 01:03:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 01:03:58,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:58,950 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:03:58,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:03:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:58,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:58,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:58,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:03:58,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:58,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:03:58,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:58,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:58,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:58,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:58,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:59,138 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 01:03:59,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 01:03:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:59,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:59,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:59,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 01:03:59,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:59,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 01:03:59,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:59,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:59,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:59,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:59,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:59,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 01:03:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:59,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:59,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:59,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 01:03:59,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:59,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 01:03:59,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:59,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:59,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 01:03:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:59,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:59,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:59,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 01:03:59,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:59,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 01:03:59,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:59,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:03:59,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:59,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 01:03:59,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 01:03:59,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925291487] [2020-10-28 01:03:59,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 01:03:59,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 01:03:59,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574329697] [2020-10-28 01:03:59,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 01:03:59,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:03:59,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 01:03:59,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 01:03:59,287 INFO L87 Difference]: Start difference. First operand 28176 states and 54024 transitions. Second operand 6 states. [2020-10-28 01:03:59,561 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:04:06,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:04:06,457 INFO L93 Difference]: Finished difference Result 61209 states and 127428 transitions. [2020-10-28 01:04:06,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 01:04:06,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-10-28 01:04:06,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:04:06,971 INFO L225 Difference]: With dead ends: 61209 [2020-10-28 01:04:06,971 INFO L226 Difference]: Without dead ends: 33356 [2020-10-28 01:04:07,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 01:04:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33356 states. [2020-10-28 01:04:12,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33356 to 31222. [2020-10-28 01:04:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31222 states. [2020-10-28 01:04:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31222 states to 31222 states and 60737 transitions. [2020-10-28 01:04:13,103 INFO L78 Accepts]: Start accepts. Automaton has 31222 states and 60737 transitions. Word has length 115 [2020-10-28 01:04:13,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:04:13,103 INFO L481 AbstractCegarLoop]: Abstraction has 31222 states and 60737 transitions. [2020-10-28 01:04:13,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 01:04:13,103 INFO L276 IsEmpty]: Start isEmpty. Operand 31222 states and 60737 transitions. [2020-10-28 01:04:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 01:04:13,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:04:13,118 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 01:04:13,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 01:04:13,118 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:04:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:04:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash 74705161, now seen corresponding path program 1 times [2020-10-28 01:04:13,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:04:13,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323584073] [2020-10-28 01:04:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:04:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:13,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:13,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:13,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:13,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:13,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:13,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:13,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:13,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:14,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:16,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:17,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:17,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:17,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:17,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:17,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:17,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:18,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:04:18,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 01:04:18,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 01:04:18,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 01:04:18,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:04:18,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:04:18,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 01:04:18,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 01:04:18,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:04:18,374 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:04:18,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:04:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:18,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:18,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:04:18,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:04:18,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:04:18,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:04:18,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:04:18,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:04:18,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:04:18,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:04:18,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:04:18,518 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 01:04:18,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 01:04:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:18,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:18,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:04:18,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 01:04:18,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:04:18,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 01:04:18,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:04:18,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:04:18,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:04:18,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:04:18,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:04:18,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 01:04:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:18,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:18,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:04:18,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 01:04:18,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:04:18,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 01:04:18,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:04:18,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:04:18,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:04:18,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:04:18,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:04:18,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 01:04:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:18,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:18,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:04:18,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 01:04:18,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:04:18,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 01:04:18,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:04:18,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:04:18,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 01:04:18,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 01:04:18,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:04:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 01:04:18,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323584073] [2020-10-28 01:04:18,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 01:04:18,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 01:04:18,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469906457] [2020-10-28 01:04:18,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 01:04:18,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:04:18,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 01:04:18,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 01:04:18,680 INFO L87 Difference]: Start difference. First operand 31222 states and 60737 transitions. Second operand 7 states. [2020-10-28 01:04:18,897 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 01:04:19,376 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 01:04:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:04:25,452 INFO L93 Difference]: Finished difference Result 58255 states and 123130 transitions. [2020-10-28 01:04:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 01:04:25,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 111 [2020-10-28 01:04:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:04:25,623 INFO L225 Difference]: With dead ends: 58255 [2020-10-28 01:04:25,623 INFO L226 Difference]: Without dead ends: 30329 [2020-10-28 01:04:26,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 01:04:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30329 states. [2020-10-28 01:04:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30329 to 28695. [2020-10-28 01:04:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28695 states. [2020-10-28 01:04:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28695 states to 28695 states and 51830 transitions. [2020-10-28 01:04:31,279 INFO L78 Accepts]: Start accepts. Automaton has 28695 states and 51830 transitions. Word has length 111 [2020-10-28 01:04:31,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:04:31,280 INFO L481 AbstractCegarLoop]: Abstraction has 28695 states and 51830 transitions. [2020-10-28 01:04:31,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 01:04:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 28695 states and 51830 transitions. [2020-10-28 01:04:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 01:04:31,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:04:31,293 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 01:04:31,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 01:04:31,293 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:04:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:04:31,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1744141093, now seen corresponding path program 1 times [2020-10-28 01:04:31,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:04:31,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045125079] [2020-10-28 01:04:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:04:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:31,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:31,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:31,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:31,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:31,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:31,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:32,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:34,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:34,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:35,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:35,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:35,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking...