/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/systemc/mem_slave_tlm.4.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:47:28,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:47:28,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:47:28,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:47:28,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:47:28,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:47:28,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:47:28,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:47:28,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:47:28,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:47:28,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:47:28,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:47:28,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:47:28,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:47:28,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:47:28,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:47:28,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:47:28,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:47:28,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:47:28,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:47:28,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:47:28,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:47:28,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:47:28,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:47:28,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:47:28,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:47:28,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:47:28,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:47:28,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:47:28,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:47:28,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:47:28,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:47:28,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:47:28,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:47:28,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:47:28,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:47:28,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:47:28,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:47:28,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:47:28,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:47:28,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:47:28,569 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 19:47:28,601 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:47:28,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:47:28,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:47:28,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:47:28,607 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:47:28,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:47:28,608 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:47:28,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:47:28,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:47:28,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:47:28,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:47:28,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:47:28,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:47:28,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:47:28,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:47:28,611 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:47:28,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:47:28,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:47:28,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:47:28,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:47:28,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:47:28,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:47:28,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:47:28,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:47:28,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:47:28,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:47:28,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:47:28,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:47:28,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:47:28,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:47:29,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:47:29,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:47:29,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:47:29,105 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:47:29,106 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:47:29,107 INFO L432 ainManager$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 19:47:29,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffe13880c/99bda6caaa63472f9ce221afda20b65e/FLAG70db9b38b [2020-10-28 19:47:29,869 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:47:29,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/mem_slave_tlm.4.cil.c [2020-10-28 19:47:29,888 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffe13880c/99bda6caaa63472f9ce221afda20b65e/FLAG70db9b38b [2020-10-28 19:47:30,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffe13880c/99bda6caaa63472f9ce221afda20b65e [2020-10-28 19:47:30,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:47:30,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:47:30,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:47:30,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:47:30,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:47:30,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:47:30" (1/1) ... [2020-10-28 19:47:30,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b4cf430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:30, skipping insertion in model container [2020-10-28 19:47:30,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:47:30" (1/1) ... [2020-10-28 19:47:30,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:47:30,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:47:30,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:47:30,579 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:47:30,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:47:30,718 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:47:30,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:30 WrapperNode [2020-10-28 19:47:30,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:47:30,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:47:30,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:47:30,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:47:30,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:30" (1/1) ... [2020-10-28 19:47:30,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:30" (1/1) ... [2020-10-28 19:47:30,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:30" (1/1) ... [2020-10-28 19:47:30,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:30" (1/1) ... [2020-10-28 19:47:30,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:30" (1/1) ... [2020-10-28 19:47:30,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:30" (1/1) ... [2020-10-28 19:47:30,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:30" (1/1) ... [2020-10-28 19:47:30,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:47:30,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:47:30,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:47:30,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:47:30,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:30" (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 19:47:30,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:47:30,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:47:30,970 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:47:30,970 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-10-28 19:47:30,970 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_read [2020-10-28 19:47:30,970 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_write [2020-10-28 19:47:30,971 INFO L138 BoogieDeclarations]: Found implementation of procedure m_run [2020-10-28 19:47:30,971 INFO L138 BoogieDeclarations]: Found implementation of procedure s_run [2020-10-28 19:47:30,971 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-10-28 19:47:30,971 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-10-28 19:47:30,971 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:47:30,971 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:47:30,971 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:47:30,972 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:47:30,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:47:30,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 19:47:30,972 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-10-28 19:47:30,972 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_read [2020-10-28 19:47:30,972 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_write [2020-10-28 19:47:30,973 INFO L130 BoogieDeclarations]: Found specification of procedure m_run [2020-10-28 19:47:30,973 INFO L130 BoogieDeclarations]: Found specification of procedure s_run [2020-10-28 19:47:30,973 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-10-28 19:47:30,973 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-10-28 19:47:30,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:47:30,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:47:30,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:47:30,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:47:30,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:47:30,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:47:30,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:47:32,227 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:47:32,228 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-28 19:47:32,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:47:32 BoogieIcfgContainer [2020-10-28 19:47:32,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:47:32,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:47:32,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:47:32,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:47:32,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:47:30" (1/3) ... [2020-10-28 19:47:32,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e9a509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:47:32, skipping insertion in model container [2020-10-28 19:47:32,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:30" (2/3) ... [2020-10-28 19:47:32,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e9a509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:47:32, skipping insertion in model container [2020-10-28 19:47:32,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:47:32" (3/3) ... [2020-10-28 19:47:32,254 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.4.cil.c [2020-10-28 19:47:32,268 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:47:32,274 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:47:32,291 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:47:32,340 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:47:32,340 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:47:32,340 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:47:32,340 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:47:32,341 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:47:32,341 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:47:32,341 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:47:32,341 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:47:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states. [2020-10-28 19:47:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 19:47:32,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:47:32,404 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 19:47:32,405 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:47:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:47:32,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1951364599, now seen corresponding path program 1 times [2020-10-28 19:47:32,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:47:32,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183243787] [2020-10-28 19:47:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:47:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:32,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:32,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:33,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:33,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:33,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:34,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:34,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:34,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:35,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:35,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:35,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:35,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:35,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:36,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:37,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:37,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 19:47:37,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:47:37,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:47:37,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:37,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:37,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:47:37,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 19:47:37,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:47:37,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:47:38,072 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:47:38,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:47:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:38,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:38,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:38,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:47:38,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:47:38,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 19:47:38,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:38,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:38,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:47:38,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:47:38,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:47:38,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:47:38,148 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 19:47:38,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183243787] [2020-10-28 19:47:38,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:47:38,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 19:47:38,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401341769] [2020-10-28 19:47:38,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 19:47:38,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:47:38,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 19:47:38,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 19:47:38,184 INFO L87 Difference]: Start difference. First operand 308 states. Second operand 3 states. [2020-10-28 19:47:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:47:39,832 INFO L93 Difference]: Finished difference Result 636 states and 1129 transitions. [2020-10-28 19:47:39,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 19:47:39,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-10-28 19:47:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:47:39,877 INFO L225 Difference]: With dead ends: 636 [2020-10-28 19:47:39,877 INFO L226 Difference]: Without dead ends: 347 [2020-10-28 19:47:39,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 19:47:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-28 19:47:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 296. [2020-10-28 19:47:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-28 19:47:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 497 transitions. [2020-10-28 19:47:39,996 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 497 transitions. Word has length 40 [2020-10-28 19:47:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:47:39,997 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 497 transitions. [2020-10-28 19:47:39,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 19:47:39,997 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 497 transitions. [2020-10-28 19:47:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 19:47:40,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:47:40,001 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 19:47:40,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:47:40,002 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:47:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:47:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1181885652, now seen corresponding path program 1 times [2020-10-28 19:47:40,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:47:40,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888247784] [2020-10-28 19:47:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:47:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:40,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:40,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:40,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:40,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:40,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:40,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:41,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:41,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:41,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:41,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:41,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:41,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:42,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:42,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:45,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:45,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 19:47:45,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:47:45,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 19:47:45,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:45,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:45,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:47:45,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 19:47:45,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 19:47:45,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:47:45,394 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:47:45,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:47:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:45,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:45,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:45,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:47:45,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:47:45,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 19:47:45,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:45,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:47:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:47:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:47:45,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:47:45,449 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 19:47:45,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888247784] [2020-10-28 19:47:45,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:47:45,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:47:45,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254922759] [2020-10-28 19:47:45,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:47:45,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:47:45,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:47:45,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:47:45,454 INFO L87 Difference]: Start difference. First operand 296 states and 497 transitions. Second operand 4 states. [2020-10-28 19:47:45,755 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 19:47:48,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:47:48,121 INFO L93 Difference]: Finished difference Result 857 states and 1416 transitions. [2020-10-28 19:47:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:47:48,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-28 19:47:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:47:48,128 INFO L225 Difference]: With dead ends: 857 [2020-10-28 19:47:48,128 INFO L226 Difference]: Without dead ends: 572 [2020-10-28 19:47:48,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:47:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2020-10-28 19:47:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 503. [2020-10-28 19:47:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-10-28 19:47:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 834 transitions. [2020-10-28 19:47:48,260 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 834 transitions. Word has length 41 [2020-10-28 19:47:48,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:47:48,260 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 834 transitions. [2020-10-28 19:47:48,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:47:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 834 transitions. [2020-10-28 19:47:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 19:47:48,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:47:48,272 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 19:47:48,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:47:48,273 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:47:48,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:47:48,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1244373066, now seen corresponding path program 1 times [2020-10-28 19:47:48,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:47:48,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112517691] [2020-10-28 19:47:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:47:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:48,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:48,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:48,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:48,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:48,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:48,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:49,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:49,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:49,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:49,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:49,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:50,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:50,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:50,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:53,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:53,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 19:47:53,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:47:53,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:47:53,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:53,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:53,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:47:53,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 19:47:53,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 19:47:53,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:47:53,656 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:47:53,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:47:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:53,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:53,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:53,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:47:53,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:47:53,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:47:53,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:53,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:53,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:47:53,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:47:53,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:47:53,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:47:53,693 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 19:47:53,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112517691] [2020-10-28 19:47:53,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:47:53,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:47:53,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139881513] [2020-10-28 19:47:53,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:47:53,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:47:53,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:47:53,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:47:53,706 INFO L87 Difference]: Start difference. First operand 503 states and 834 transitions. Second operand 4 states. [2020-10-28 19:47:53,985 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 19:47:56,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:47:56,219 INFO L93 Difference]: Finished difference Result 1270 states and 2090 transitions. [2020-10-28 19:47:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:47:56,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 19:47:56,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:47:56,231 INFO L225 Difference]: With dead ends: 1270 [2020-10-28 19:47:56,231 INFO L226 Difference]: Without dead ends: 779 [2020-10-28 19:47:56,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:47:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-10-28 19:47:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 702. [2020-10-28 19:47:56,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-10-28 19:47:56,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1143 transitions. [2020-10-28 19:47:56,310 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1143 transitions. Word has length 43 [2020-10-28 19:47:56,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:47:56,311 INFO L481 AbstractCegarLoop]: Abstraction has 702 states and 1143 transitions. [2020-10-28 19:47:56,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:47:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1143 transitions. [2020-10-28 19:47:56,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 19:47:56,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:47:56,313 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 19:47:56,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:47:56,313 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:47:56,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:47:56,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1331726164, now seen corresponding path program 1 times [2020-10-28 19:47:56,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:47:56,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228730014] [2020-10-28 19:47:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:47:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:56,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:56,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:56,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:56,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:56,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:56,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:56,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:56,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:57,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:57,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:59,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:59,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 19:47:59,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 19:47:59,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3115 [2020-10-28 19:47:59,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:59,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:59,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:47:59,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:47:59,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 19:47:59,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:47:59,777 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:47:59,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:47:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:59,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:59,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:59,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:47:59,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:47:59,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:47:59,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:59,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:59,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:47:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:47:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:47:59,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:47:59,813 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 19:47:59,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228730014] [2020-10-28 19:47:59,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:47:59,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:47:59,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113625706] [2020-10-28 19:47:59,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:47:59,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:47:59,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:47:59,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:47:59,818 INFO L87 Difference]: Start difference. First operand 702 states and 1143 transitions. Second operand 4 states. [2020-10-28 19:48:00,103 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:48:01,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:01,699 INFO L93 Difference]: Finished difference Result 1447 states and 2357 transitions. [2020-10-28 19:48:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:01,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-28 19:48:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:01,711 INFO L225 Difference]: With dead ends: 1447 [2020-10-28 19:48:01,711 INFO L226 Difference]: Without dead ends: 765 [2020-10-28 19:48:01,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:48:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2020-10-28 19:48:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 702. [2020-10-28 19:48:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-10-28 19:48:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1125 transitions. [2020-10-28 19:48:01,809 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1125 transitions. Word has length 45 [2020-10-28 19:48:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:01,809 INFO L481 AbstractCegarLoop]: Abstraction has 702 states and 1125 transitions. [2020-10-28 19:48:01,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1125 transitions. [2020-10-28 19:48:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 19:48:01,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:01,811 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 19:48:01,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:48:01,812 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:01,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1131982474, now seen corresponding path program 1 times [2020-10-28 19:48:01,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:01,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014176786] [2020-10-28 19:48:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:01,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:01,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:01,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:02,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:02,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:02,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:02,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:02,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:02,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:02,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:02,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:02,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:03,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:03,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:06,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:06,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 19:48:06,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:48:06,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 19:48:06,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:06,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:06,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:06,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 19:48:06,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 19:48:06,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 19:48:07,144 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:48:07,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:07,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:07,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:07,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:07,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:07,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:48:07,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:07,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:07,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:07,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:07,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:07,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:07,170 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 19:48:07,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014176786] [2020-10-28 19:48:07,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:07,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:07,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440928391] [2020-10-28 19:48:07,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:07,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:07,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:07,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:07,173 INFO L87 Difference]: Start difference. First operand 702 states and 1125 transitions. Second operand 4 states. [2020-10-28 19:48:07,460 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:48:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:09,644 INFO L93 Difference]: Finished difference Result 1694 states and 2714 transitions. [2020-10-28 19:48:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:09,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-28 19:48:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:09,652 INFO L225 Difference]: With dead ends: 1694 [2020-10-28 19:48:09,652 INFO L226 Difference]: Without dead ends: 1007 [2020-10-28 19:48:09,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:48:09,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2020-10-28 19:48:09,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 911. [2020-10-28 19:48:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 911 states. [2020-10-28 19:48:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1376 transitions. [2020-10-28 19:48:09,757 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1376 transitions. Word has length 47 [2020-10-28 19:48:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:09,757 INFO L481 AbstractCegarLoop]: Abstraction has 911 states and 1376 transitions. [2020-10-28 19:48:09,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1376 transitions. [2020-10-28 19:48:09,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 19:48:09,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:09,759 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 19:48:09,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:48:09,759 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:09,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1781858410, now seen corresponding path program 1 times [2020-10-28 19:48:09,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:09,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827660747] [2020-10-28 19:48:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:09,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:09,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:09,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:09,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:10,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:10,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:10,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:10,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:13,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:13,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 19:48:13,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:48:13,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3633 [2020-10-28 19:48:13,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:13,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:13,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:13,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 19:48:13,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 19:48:13,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:13,761 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:48:13,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:13,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:13,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:13,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:13,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:13,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:48:13,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:13,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:13,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:13,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:13,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:13,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:13,808 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 19:48:13,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827660747] [2020-10-28 19:48:13,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:13,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:13,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169253858] [2020-10-28 19:48:13,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:13,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:13,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:13,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:13,817 INFO L87 Difference]: Start difference. First operand 911 states and 1376 transitions. Second operand 4 states. [2020-10-28 19:48:14,212 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:48:16,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:16,582 INFO L93 Difference]: Finished difference Result 2112 states and 3211 transitions. [2020-10-28 19:48:16,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:16,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-28 19:48:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:16,592 INFO L225 Difference]: With dead ends: 2112 [2020-10-28 19:48:16,593 INFO L226 Difference]: Without dead ends: 1222 [2020-10-28 19:48:16,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:48:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2020-10-28 19:48:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1119. [2020-10-28 19:48:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1119 states. [2020-10-28 19:48:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1681 transitions. [2020-10-28 19:48:16,728 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1681 transitions. Word has length 49 [2020-10-28 19:48:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:16,728 INFO L481 AbstractCegarLoop]: Abstraction has 1119 states and 1681 transitions. [2020-10-28 19:48:16,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1681 transitions. [2020-10-28 19:48:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 19:48:16,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:16,731 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 19:48:16,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:48:16,731 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:16,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:16,732 INFO L82 PathProgramCache]: Analyzing trace with hash 537842893, now seen corresponding path program 1 times [2020-10-28 19:48:16,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:16,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047275200] [2020-10-28 19:48:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:16,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:16,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:16,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:17,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:17,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:17,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:17,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:17,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:17,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:19,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:19,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 19:48:19,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:48:19,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3060 [2020-10-28 19:48:19,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:19,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:19,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:48:19,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 19:48:19,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 19:48:19,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:20,084 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:48:20,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:20,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:20,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:20,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:20,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:20,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:48:20,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:20,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:20,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:20,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:20,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:20,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:20,112 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 19:48:20,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047275200] [2020-10-28 19:48:20,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:20,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:20,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891809231] [2020-10-28 19:48:20,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:20,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:20,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:20,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:20,116 INFO L87 Difference]: Start difference. First operand 1119 states and 1681 transitions. Second operand 4 states. [2020-10-28 19:48:20,434 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:48:22,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:22,759 INFO L93 Difference]: Finished difference Result 3358 states and 5195 transitions. [2020-10-28 19:48:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:22,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-28 19:48:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:22,777 INFO L225 Difference]: With dead ends: 3358 [2020-10-28 19:48:22,777 INFO L226 Difference]: Without dead ends: 2265 [2020-10-28 19:48:22,789 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 19:48:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2020-10-28 19:48:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2101. [2020-10-28 19:48:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2101 states. [2020-10-28 19:48:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 3121 transitions. [2020-10-28 19:48:23,051 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 3121 transitions. Word has length 50 [2020-10-28 19:48:23,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:23,053 INFO L481 AbstractCegarLoop]: Abstraction has 2101 states and 3121 transitions. [2020-10-28 19:48:23,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:23,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 3121 transitions. [2020-10-28 19:48:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 19:48:23,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:23,057 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 19:48:23,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:48:23,057 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1541052470, now seen corresponding path program 1 times [2020-10-28 19:48:23,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:23,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308063951] [2020-10-28 19:48:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:23,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:23,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:23,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:23,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:23,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:23,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:23,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:23,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:23,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:23,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:25,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:25,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 19:48:25,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 19:48:25,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2019 [2020-10-28 19:48:25,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:25,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:25,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:48:25,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:48:25,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 19:48:25,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:25,412 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:48:25,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:25,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:25,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:25,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:25,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:25,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 19:48:25,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:25,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:25,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:25,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:25,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:25,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:25,435 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 19:48:25,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308063951] [2020-10-28 19:48:25,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:25,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:25,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493973986] [2020-10-28 19:48:25,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:25,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:25,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:25,437 INFO L87 Difference]: Start difference. First operand 2101 states and 3121 transitions. Second operand 4 states. [2020-10-28 19:48:25,717 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:48:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:28,071 INFO L93 Difference]: Finished difference Result 5353 states and 8198 transitions. [2020-10-28 19:48:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:28,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-28 19:48:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:28,095 INFO L225 Difference]: With dead ends: 5353 [2020-10-28 19:48:28,095 INFO L226 Difference]: Without dead ends: 3276 [2020-10-28 19:48:28,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:48:28,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2020-10-28 19:48:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 3048. [2020-10-28 19:48:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3048 states. [2020-10-28 19:48:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 4483 transitions. [2020-10-28 19:48:28,460 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 4483 transitions. Word has length 50 [2020-10-28 19:48:28,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:28,460 INFO L481 AbstractCegarLoop]: Abstraction has 3048 states and 4483 transitions. [2020-10-28 19:48:28,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 4483 transitions. [2020-10-28 19:48:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 19:48:28,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:28,463 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 19:48:28,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:48:28,463 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:28,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1684042198, now seen corresponding path program 1 times [2020-10-28 19:48:28,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:28,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479112401] [2020-10-28 19:48:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:28,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:28,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:28,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:28,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:28,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:28,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:29,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:29,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 19:48:29,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:48:29,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1320 [2020-10-28 19:48:29,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:29,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:29,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 19:48:29,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:48:29,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 19:48:29,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:30,065 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:48:30,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:30,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:30,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:30,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:30,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:30,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:48:30,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:30,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:30,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:30,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:30,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:30,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:30,091 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 19:48:30,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479112401] [2020-10-28 19:48:30,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:30,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:30,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979706860] [2020-10-28 19:48:30,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:30,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:30,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:30,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:30,093 INFO L87 Difference]: Start difference. First operand 3048 states and 4483 transitions. Second operand 4 states. [2020-10-28 19:48:30,380 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:48:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:32,745 INFO L93 Difference]: Finished difference Result 6919 states and 10452 transitions. [2020-10-28 19:48:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:32,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-28 19:48:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:32,774 INFO L225 Difference]: With dead ends: 6919 [2020-10-28 19:48:32,774 INFO L226 Difference]: Without dead ends: 3889 [2020-10-28 19:48:32,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 19:48:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2020-10-28 19:48:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3598. [2020-10-28 19:48:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3598 states. [2020-10-28 19:48:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 5291 transitions. [2020-10-28 19:48:33,233 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 5291 transitions. Word has length 50 [2020-10-28 19:48:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:33,233 INFO L481 AbstractCegarLoop]: Abstraction has 3598 states and 5291 transitions. [2020-10-28 19:48:33,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:33,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 5291 transitions. [2020-10-28 19:48:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 19:48:33,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:33,235 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] [2020-10-28 19:48:33,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:48:33,236 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:33,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1343473523, now seen corresponding path program 1 times [2020-10-28 19:48:33,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:33,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95496893] [2020-10-28 19:48:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:33,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:33,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:33,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:33,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:36,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:36,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 19:48:36,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:48:36,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2984 [2020-10-28 19:48:36,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:36,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:36,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:36,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 19:48:36,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:48:36,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:36,512 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:48:36,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:36,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:36,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:36,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:36,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:36,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 19:48:36,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:36,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:36,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:36,532 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 19:48:36,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95496893] [2020-10-28 19:48:36,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:36,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:36,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732841541] [2020-10-28 19:48:36,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:36,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:36,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:36,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:36,535 INFO L87 Difference]: Start difference. First operand 3598 states and 5291 transitions. Second operand 4 states. [2020-10-28 19:48:36,802 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:48:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:39,612 INFO L93 Difference]: Finished difference Result 10340 states and 15804 transitions. [2020-10-28 19:48:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:39,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-28 19:48:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:39,656 INFO L225 Difference]: With dead ends: 10340 [2020-10-28 19:48:39,656 INFO L226 Difference]: Without dead ends: 6760 [2020-10-28 19:48:39,683 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 19:48:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6760 states. [2020-10-28 19:48:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6760 to 6271. [2020-10-28 19:48:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6271 states. [2020-10-28 19:48:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 9269 transitions. [2020-10-28 19:48:40,500 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 9269 transitions. Word has length 53 [2020-10-28 19:48:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:40,501 INFO L481 AbstractCegarLoop]: Abstraction has 6271 states and 9269 transitions. [2020-10-28 19:48:40,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 9269 transitions. [2020-10-28 19:48:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 19:48:40,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:40,503 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] [2020-10-28 19:48:40,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:48:40,504 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:40,504 INFO L82 PathProgramCache]: Analyzing trace with hash -670024169, now seen corresponding path program 1 times [2020-10-28 19:48:40,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:40,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872372218] [2020-10-28 19:48:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:40,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:40,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:41,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:41,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 19:48:41,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:48:41,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-28 19:48:41,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:41,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:41,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 19:48:41,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:48:41,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 19:48:41,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:41,904 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:48:41,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:41,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:41,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:41,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:41,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:41,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:48:41,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:41,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:41,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:41,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:41,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:48:41,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:41,934 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 19:48:41,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872372218] [2020-10-28 19:48:41,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:41,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:48:41,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071233394] [2020-10-28 19:48:41,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:48:41,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:41,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:48:41,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:48:41,936 INFO L87 Difference]: Start difference. First operand 6271 states and 9269 transitions. Second operand 7 states. [2020-10-28 19:48:42,203 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:48:42,980 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 19:48:43,275 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 19:48:45,123 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 19:48:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:46,626 INFO L93 Difference]: Finished difference Result 15942 states and 24954 transitions. [2020-10-28 19:48:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 19:48:46,627 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-28 19:48:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:46,690 INFO L225 Difference]: With dead ends: 15942 [2020-10-28 19:48:46,690 INFO L226 Difference]: Without dead ends: 11082 [2020-10-28 19:48:46,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-28 19:48:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2020-10-28 19:48:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 10108. [2020-10-28 19:48:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10108 states. [2020-10-28 19:48:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10108 states to 10108 states and 15848 transitions. [2020-10-28 19:48:48,015 INFO L78 Accepts]: Start accepts. Automaton has 10108 states and 15848 transitions. Word has length 54 [2020-10-28 19:48:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:48,016 INFO L481 AbstractCegarLoop]: Abstraction has 10108 states and 15848 transitions. [2020-10-28 19:48:48,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:48:48,016 INFO L276 IsEmpty]: Start isEmpty. Operand 10108 states and 15848 transitions. [2020-10-28 19:48:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 19:48:48,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:48,018 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] [2020-10-28 19:48:48,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:48:48,019 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:48,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1197545486, now seen corresponding path program 1 times [2020-10-28 19:48:48,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:48,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338974704] [2020-10-28 19:48:48,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:48,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:48,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:48,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:48,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:49,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:49,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 19:48:49,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:48:49,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1797 [2020-10-28 19:48:49,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:49,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:49,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 19:48:49,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:48:49,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 19:48:49,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:50,144 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:48:50,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:50,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:50,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:50,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:50,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:50,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:48:50,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:50,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:50,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:50,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:50,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:48:50,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:50,176 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 19:48:50,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338974704] [2020-10-28 19:48:50,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:50,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:48:50,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220350009] [2020-10-28 19:48:50,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:48:50,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:50,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:48:50,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:48:50,178 INFO L87 Difference]: Start difference. First operand 10108 states and 15848 transitions. Second operand 7 states. [2020-10-28 19:48:50,466 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:48:51,377 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 19:48:51,700 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 19:48:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:54,504 INFO L93 Difference]: Finished difference Result 19056 states and 30352 transitions. [2020-10-28 19:48:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 19:48:54,505 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-28 19:48:54,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:54,552 INFO L225 Difference]: With dead ends: 19056 [2020-10-28 19:48:54,553 INFO L226 Difference]: Without dead ends: 10937 [2020-10-28 19:48:54,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-28 19:48:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10937 states. [2020-10-28 19:48:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10937 to 10000. [2020-10-28 19:48:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10000 states. [2020-10-28 19:48:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10000 states to 10000 states and 15596 transitions. [2020-10-28 19:48:55,801 INFO L78 Accepts]: Start accepts. Automaton has 10000 states and 15596 transitions. Word has length 55 [2020-10-28 19:48:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:55,801 INFO L481 AbstractCegarLoop]: Abstraction has 10000 states and 15596 transitions. [2020-10-28 19:48:55,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:48:55,802 INFO L276 IsEmpty]: Start isEmpty. Operand 10000 states and 15596 transitions. [2020-10-28 19:48:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 19:48:55,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:55,809 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] [2020-10-28 19:48:55,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:48:55,810 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:55,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:55,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1139597194, now seen corresponding path program 1 times [2020-10-28 19:48:55,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:55,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794631902] [2020-10-28 19:48:55,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:55,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:55,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:56,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:56,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 19:48:56,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:48:56,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-28 19:48:56,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:56,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:56,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:56,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 19:48:56,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 19:48:56,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:56,455 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:48:56,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:56,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:56,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:56,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:56,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:56,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:48:56,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:56,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:56,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:56,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:56,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:56,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:56,483 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 19:48:56,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794631902] [2020-10-28 19:48:56,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:56,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:56,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073366124] [2020-10-28 19:48:56,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:56,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:56,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:56,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:56,485 INFO L87 Difference]: Start difference. First operand 10000 states and 15596 transitions. Second operand 4 states. [2020-10-28 19:48:56,942 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:49:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:49:00,309 INFO L93 Difference]: Finished difference Result 16673 states and 28281 transitions. [2020-10-28 19:49:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:49:00,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-28 19:49:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:49:00,382 INFO L225 Difference]: With dead ends: 16673 [2020-10-28 19:49:00,383 INFO L226 Difference]: Without dead ends: 16668 [2020-10-28 19:49:00,391 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 19:49:00,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16668 states. [2020-10-28 19:49:02,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16668 to 15342. [2020-10-28 19:49:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15342 states. [2020-10-28 19:49:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15342 states to 15342 states and 26467 transitions. [2020-10-28 19:49:02,642 INFO L78 Accepts]: Start accepts. Automaton has 15342 states and 26467 transitions. Word has length 64 [2020-10-28 19:49:02,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:49:02,642 INFO L481 AbstractCegarLoop]: Abstraction has 15342 states and 26467 transitions. [2020-10-28 19:49:02,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:49:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 15342 states and 26467 transitions. [2020-10-28 19:49:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:49:02,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:49:02,666 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 19:49:02,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:49:02,666 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:49:02,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:49:02,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1447111375, now seen corresponding path program 1 times [2020-10-28 19:49:02,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:49:02,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527636148] [2020-10-28 19:49:02,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:49:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:02,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:02,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:03,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:03,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 19:49:03,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:49:03,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-28 19:49:03,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:03,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:03,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:49:03,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 19:49:03,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 19:49:03,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:03,617 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:49:03,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:49:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:03,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:03,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:03,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:49:03,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:03,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:49:03,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:03,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:03,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:03,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:03,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:03,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:03,640 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 19:49:03,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527636148] [2020-10-28 19:49:03,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:49:03,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:49:03,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363785157] [2020-10-28 19:49:03,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:49:03,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:49:03,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:49:03,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:49:03,642 INFO L87 Difference]: Start difference. First operand 15342 states and 26467 transitions. Second operand 4 states. [2020-10-28 19:49:04,154 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 19:49:07,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:49:07,374 INFO L93 Difference]: Finished difference Result 32852 states and 59635 transitions. [2020-10-28 19:49:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:49:07,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-28 19:49:07,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:49:07,458 INFO L225 Difference]: With dead ends: 32852 [2020-10-28 19:49:07,458 INFO L226 Difference]: Without dead ends: 17537 [2020-10-28 19:49:07,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:49:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17537 states. [2020-10-28 19:49:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17537 to 14539. [2020-10-28 19:49:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14539 states. [2020-10-28 19:49:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14539 states to 14539 states and 24418 transitions. [2020-10-28 19:49:09,625 INFO L78 Accepts]: Start accepts. Automaton has 14539 states and 24418 transitions. Word has length 78 [2020-10-28 19:49:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:49:09,625 INFO L481 AbstractCegarLoop]: Abstraction has 14539 states and 24418 transitions. [2020-10-28 19:49:09,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:49:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 14539 states and 24418 transitions. [2020-10-28 19:49:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 19:49:09,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:49:09,639 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 19:49:09,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:49:09,640 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:49:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:49:09,640 INFO L82 PathProgramCache]: Analyzing trace with hash 261186644, now seen corresponding path program 1 times [2020-10-28 19:49:09,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:49:09,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324647355] [2020-10-28 19:49:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:49:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:09,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:09,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:10,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:10,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 19:49:10,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:49:10,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-28 19:49:10,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:10,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:10,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:49:10,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 19:49:10,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 19:49:10,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:10,340 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:49:10,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:49:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:10,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:10,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:10,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:49:10,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:10,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 19:49:10,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:10,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:10,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:10,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:10,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:10,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:10,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 19:49:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:10,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:10,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:10,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 19:49:10,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:10,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:49:10,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:10,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:10,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:49:10,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:10,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 19:49:10,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:10,744 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 19:49:10,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324647355] [2020-10-28 19:49:10,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:49:10,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:49:10,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678236722] [2020-10-28 19:49:10,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:49:10,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:49:10,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:49:10,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:49:10,747 INFO L87 Difference]: Start difference. First operand 14539 states and 24418 transitions. Second operand 7 states. [2020-10-28 19:49:11,253 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 19:49:12,114 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:49:13,988 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 19:49:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:49:17,147 INFO L93 Difference]: Finished difference Result 32958 states and 59718 transitions. [2020-10-28 19:49:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 19:49:17,148 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-28 19:49:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:49:17,270 INFO L225 Difference]: With dead ends: 32958 [2020-10-28 19:49:17,270 INFO L226 Difference]: Without dead ends: 25286 [2020-10-28 19:49:17,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 19:49:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25286 states. [2020-10-28 19:49:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25286 to 21552. [2020-10-28 19:49:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21552 states. [2020-10-28 19:49:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21552 states to 21552 states and 38261 transitions. [2020-10-28 19:49:20,949 INFO L78 Accepts]: Start accepts. Automaton has 21552 states and 38261 transitions. Word has length 82 [2020-10-28 19:49:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:49:20,949 INFO L481 AbstractCegarLoop]: Abstraction has 21552 states and 38261 transitions. [2020-10-28 19:49:20,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:49:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 21552 states and 38261 transitions. [2020-10-28 19:49:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 19:49:20,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:49:20,960 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 19:49:20,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:49:20,960 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:49:20,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:49:20,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1900185941, now seen corresponding path program 1 times [2020-10-28 19:49:20,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:49:20,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458746504] [2020-10-28 19:49:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:49:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:21,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:21,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:21,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 19:49:21,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:21,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-28 19:49:21,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:21,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:21,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 19:49:21,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 19:49:21,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 19:49:21,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:21,652 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:49:21,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:49:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:21,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:21,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:21,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:49:21,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:21,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:49:21,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:21,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:21,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:21,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:21,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:21,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:21,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 19:49:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:21,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:21,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:21,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 19:49:21,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:21,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 19:49:21,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:21,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:21,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:49:21,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:21,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 19:49:21,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:21,852 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 19:49:21,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458746504] [2020-10-28 19:49:21,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:49:21,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 19:49:21,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081857889] [2020-10-28 19:49:21,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 19:49:21,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:49:21,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 19:49:21,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:49:21,854 INFO L87 Difference]: Start difference. First operand 21552 states and 38261 transitions. Second operand 10 states. [2020-10-28 19:49:22,119 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 19:49:22,809 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 19:49:23,180 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:49:23,798 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 19:49:24,182 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 19:49:24,371 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-28 19:49:26,382 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 19:49:26,808 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 19:49:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:49:31,018 INFO L93 Difference]: Finished difference Result 45787 states and 88426 transitions. [2020-10-28 19:49:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 19:49:31,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-28 19:49:31,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:49:31,132 INFO L225 Difference]: With dead ends: 45787 [2020-10-28 19:49:31,132 INFO L226 Difference]: Without dead ends: 32653 [2020-10-28 19:49:31,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-28 19:49:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32653 states. [2020-10-28 19:49:35,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32653 to 27414. [2020-10-28 19:49:35,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27414 states. [2020-10-28 19:49:35,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27414 states to 27414 states and 52019 transitions. [2020-10-28 19:49:35,845 INFO L78 Accepts]: Start accepts. Automaton has 27414 states and 52019 transitions. Word has length 83 [2020-10-28 19:49:35,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:49:35,845 INFO L481 AbstractCegarLoop]: Abstraction has 27414 states and 52019 transitions. [2020-10-28 19:49:35,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 19:49:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 27414 states and 52019 transitions. [2020-10-28 19:49:35,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 19:49:35,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:49:35,865 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 19:49:35,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 19:49:35,865 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:49:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:49:35,865 INFO L82 PathProgramCache]: Analyzing trace with hash 549619660, now seen corresponding path program 1 times [2020-10-28 19:49:35,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:49:35,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923188734] [2020-10-28 19:49:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:49:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:35,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:36,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:36,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:36,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:36,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:36,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:37,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:37,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:40,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:40,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 19:49:40,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:49:40,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:49:40,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:40,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:40,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:49:40,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 19:49:40,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 19:49:40,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:41,185 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:49:41,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:49:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:41,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:41,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:41,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:49:41,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:41,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:49:41,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:41,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:41,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:41,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:41,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:41,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:41,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 19:49:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:41,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:41,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:41,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 19:49:41,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:41,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:49:41,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:41,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:49:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 19:49:41,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:41,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 19:49:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:41,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:41,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:41,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 19:49:41,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:41,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:49:41,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:41,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 19:49:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:41,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 19:49:41,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923188734] [2020-10-28 19:49:41,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:49:41,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 19:49:41,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335772900] [2020-10-28 19:49:41,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:49:41,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:49:41,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:49:41,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:49:41,339 INFO L87 Difference]: Start difference. First operand 27414 states and 52019 transitions. Second operand 5 states. [2020-10-28 19:49:41,727 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:49:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:49:48,012 INFO L93 Difference]: Finished difference Result 58525 states and 123654 transitions. [2020-10-28 19:49:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:49:48,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-10-28 19:49:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:49:48,135 INFO L225 Difference]: With dead ends: 58525 [2020-10-28 19:49:48,135 INFO L226 Difference]: Without dead ends: 31116 [2020-10-28 19:49:48,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:49:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31116 states. [2020-10-28 19:49:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31116 to 29698. [2020-10-28 19:49:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29698 states. [2020-10-28 19:49:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29698 states to 29698 states and 57231 transitions. [2020-10-28 19:49:54,013 INFO L78 Accepts]: Start accepts. Automaton has 29698 states and 57231 transitions. Word has length 93 [2020-10-28 19:49:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:49:54,014 INFO L481 AbstractCegarLoop]: Abstraction has 29698 states and 57231 transitions. [2020-10-28 19:49:54,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:49:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 29698 states and 57231 transitions. [2020-10-28 19:49:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 19:49:54,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:49:54,037 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] [2020-10-28 19:49:54,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 19:49:54,037 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:49:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:49:54,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1294563015, now seen corresponding path program 1 times [2020-10-28 19:49:54,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:49:54,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274858478] [2020-10-28 19:49:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:49:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:54,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:54,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:54,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:54,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:54,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:54,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:56,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:56,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:58,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:59,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:59,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 19:49:59,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:49:59,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:49:59,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:59,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:59,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 19:49:59,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:49:59,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 19:49:59,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:59,373 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:49:59,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:49:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:59,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:59,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:59,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:49:59,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:59,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:49:59,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:59,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:59,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:59,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:59,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:59,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:59,567 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 19:49:59,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 19:49:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:59,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:59,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:59,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 19:49:59,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:59,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 19:49:59,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:59,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:49:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 19:49:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:49:59,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:59,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 19:49:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:59,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:59,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:59,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 19:49:59,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:59,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:49:59,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:59,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:49:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 19:49:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 19:49:59,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:59,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 19:49:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:59,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:59,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:59,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 19:49:59,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:59,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:49:59,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:59,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:59,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:59,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 19:49:59,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:59,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 19:49:59,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274858478] [2020-10-28 19:49:59,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:49:59,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 19:49:59,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059740879] [2020-10-28 19:49:59,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:49:59,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:49:59,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:49:59,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:49:59,832 INFO L87 Difference]: Start difference. First operand 29698 states and 57231 transitions. Second operand 8 states. [2020-10-28 19:50:00,113 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:50:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:50:05,119 INFO L93 Difference]: Finished difference Result 58085 states and 123901 transitions. [2020-10-28 19:50:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:50:05,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 108 [2020-10-28 19:50:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:50:05,236 INFO L225 Difference]: With dead ends: 58085 [2020-10-28 19:50:05,236 INFO L226 Difference]: Without dead ends: 28586 [2020-10-28 19:50:05,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2020-10-28 19:50:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28586 states. [2020-10-28 19:50:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28586 to 27186. [2020-10-28 19:50:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27186 states. [2020-10-28 19:50:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27186 states to 27186 states and 51160 transitions. [2020-10-28 19:50:10,658 INFO L78 Accepts]: Start accepts. Automaton has 27186 states and 51160 transitions. Word has length 108 [2020-10-28 19:50:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:50:10,659 INFO L481 AbstractCegarLoop]: Abstraction has 27186 states and 51160 transitions. [2020-10-28 19:50:10,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:50:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 27186 states and 51160 transitions. [2020-10-28 19:50:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 19:50:10,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:50:10,679 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 19:50:10,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 19:50:10,680 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:50:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:50:10,680 INFO L82 PathProgramCache]: Analyzing trace with hash -718960107, now seen corresponding path program 1 times [2020-10-28 19:50:10,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:50:10,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961136633] [2020-10-28 19:50:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:50:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:10,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:10,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:10,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:10,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:10,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:11,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:13,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:13,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:15,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:15,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:15,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 19:50:15,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:50:15,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 19:50:15,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:15,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 19:50:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:50:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 19:50:15,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:16,009 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:50:16,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:50:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:16,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:16,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:16,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:50:16,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:16,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:50:16,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:16,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:16,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:16,187 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 19:50:16,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 19:50:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:16,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:16,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:16,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 19:50:16,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:16,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 19:50:16,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:16,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:16,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:50:16,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 19:50:16,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 19:50:16,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:16,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 19:50:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:16,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:16,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:16,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 19:50:16,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:16,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:50:16,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:16,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 19:50:16,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:16,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 19:50:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:16,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:16,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:16,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 19:50:16,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:16,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:50:16,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:16,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:16,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:16,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:50:16,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 19:50:16,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 19:50:16,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961136633] [2020-10-28 19:50:16,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:50:16,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 19:50:16,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743596469] [2020-10-28 19:50:16,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:50:16,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:50:16,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:50:16,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:50:16,443 INFO L87 Difference]: Start difference. First operand 27186 states and 51160 transitions. Second operand 8 states. [2020-10-28 19:50:16,695 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 19:50:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:50:22,838 INFO L93 Difference]: Finished difference Result 50990 states and 109912 transitions. [2020-10-28 19:50:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:50:22,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-10-28 19:50:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:50:22,975 INFO L225 Difference]: With dead ends: 50990 [2020-10-28 19:50:22,976 INFO L226 Difference]: Without dead ends: 24003 [2020-10-28 19:50:23,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-28 19:50:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24003 states. [2020-10-28 19:50:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24003 to 22577. [2020-10-28 19:50:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22577 states. [2020-10-28 19:50:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22577 states to 22577 states and 43674 transitions. [2020-10-28 19:50:28,097 INFO L78 Accepts]: Start accepts. Automaton has 22577 states and 43674 transitions. Word has length 111 [2020-10-28 19:50:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:50:28,097 INFO L481 AbstractCegarLoop]: Abstraction has 22577 states and 43674 transitions. [2020-10-28 19:50:28,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:50:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 22577 states and 43674 transitions. [2020-10-28 19:50:28,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 19:50:28,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:50:28,107 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:50:28,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 19:50:28,107 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:50:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:50:28,108 INFO L82 PathProgramCache]: Analyzing trace with hash 298464045, now seen corresponding path program 1 times [2020-10-28 19:50:28,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:50:28,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909531025] [2020-10-28 19:50:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:50:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:28,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:28,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:28,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:28,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:28,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:28,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:28,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:28,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:28,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:29,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:29,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:30,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:30,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:30,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:33,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:33,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 19:50:33,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:50:33,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:50:33,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:33,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:33,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:33,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 102 [2020-10-28 19:50:33,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 19:50:33,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:33,441 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:50:33,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:50:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:33,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:33,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:33,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:50:33,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:33,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:50:33,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:33,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:33,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:33,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:33,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:33,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:33,628 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 19:50:33,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 19:50:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:33,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:33,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:33,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 19:50:33,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:33,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:50:33,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:33,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:33,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:33,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:33,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:33,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:33,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 19:50:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:33,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:33,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:33,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 19:50:33,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:33,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 19:50:33,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:33,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:33,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:33,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:33,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:33,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:33,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 19:50:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:33,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:33,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:33,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 19:50:33,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:33,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:50:33,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:33,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:33,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:33,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:33,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 19:50:33,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:33,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-28 19:50:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:33,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:33,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:33,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:33,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 19:50:33,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:50:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:50:33,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:33,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:50:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 19:50:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 19:50:33,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909531025] [2020-10-28 19:50:33,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:50:33,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 19:50:33,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48765750] [2020-10-28 19:50:33,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:50:33,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:50:33,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:50:33,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:50:33,912 INFO L87 Difference]: Start difference. First operand 22577 states and 43674 transitions. Second operand 8 states. [2020-10-28 19:50:34,207 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 19:50:35,458 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:50:41,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:50:41,746 INFO L93 Difference]: Finished difference Result 42996 states and 94420 transitions. [2020-10-28 19:50:41,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 19:50:41,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 145 [2020-10-28 19:50:41,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:50:41,850 INFO L225 Difference]: With dead ends: 42996 [2020-10-28 19:50:41,851 INFO L226 Difference]: Without dead ends: 21336 [2020-10-28 19:50:42,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-28 19:50:42,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21336 states. [2020-10-28 19:50:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21336 to 20782. [2020-10-28 19:50:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20782 states. [2020-10-28 19:50:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20782 states to 20782 states and 39791 transitions. [2020-10-28 19:50:45,668 INFO L78 Accepts]: Start accepts. Automaton has 20782 states and 39791 transitions. Word has length 145 [2020-10-28 19:50:45,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:50:45,668 INFO L481 AbstractCegarLoop]: Abstraction has 20782 states and 39791 transitions. [2020-10-28 19:50:45,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:50:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 20782 states and 39791 transitions. [2020-10-28 19:50:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 19:50:45,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:50:45,678 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:50:45,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 19:50:45,678 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:50:45,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:50:45,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1587018511, now seen corresponding path program 1 times [2020-10-28 19:50:45,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:50:45,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628691884] [2020-10-28 19:50:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:50:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:45,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:45,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:45,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:45,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:48,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:48,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 19:50:48,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:50:48,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2444 [2020-10-28 19:50:48,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:48,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:48,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:50:48,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 19:50:48,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 19:50:48,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:48,418 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:50:48,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:50:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:48,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:48,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:48,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:50:48,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:48,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:50:48,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:48,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:48,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:48,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:48,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:48,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:50:48,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628691884] [2020-10-28 19:50:48,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:50:48,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 19:50:48,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042009200] [2020-10-28 19:50:48,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:50:48,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:50:48,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:50:48,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:50:48,460 INFO L87 Difference]: Start difference. First operand 20782 states and 39791 transitions. Second operand 5 states. [2020-10-28 19:50:48,824 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 19:50:52,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:50:52,969 INFO L93 Difference]: Finished difference Result 39642 states and 83851 transitions. [2020-10-28 19:50:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:50:52,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2020-10-28 19:50:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:50:53,077 INFO L225 Difference]: With dead ends: 39642 [2020-10-28 19:50:53,077 INFO L226 Difference]: Without dead ends: 22857 [2020-10-28 19:50:53,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:50:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22857 states. [2020-10-28 19:50:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22857 to 21073. [2020-10-28 19:50:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21073 states. [2020-10-28 19:50:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21073 states to 21073 states and 39857 transitions. [2020-10-28 19:50:56,913 INFO L78 Accepts]: Start accepts. Automaton has 21073 states and 39857 transitions. Word has length 119 [2020-10-28 19:50:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:50:56,913 INFO L481 AbstractCegarLoop]: Abstraction has 21073 states and 39857 transitions. [2020-10-28 19:50:56,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:50:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand 21073 states and 39857 transitions. [2020-10-28 19:50:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 19:50:56,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:50:56,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:50:56,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 19:50:56,921 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:50:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:50:56,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1750643827, now seen corresponding path program 1 times [2020-10-28 19:50:56,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:50:56,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812940486] [2020-10-28 19:50:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:50:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:56,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:56,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:57,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:59,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:59,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 19:50:59,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 19:50:59,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2226 [2020-10-28 19:50:59,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:59,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 19:50:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 19:50:59,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:59,438 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:50:59,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:50:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:59,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:59,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:59,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:50:59,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:59,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:50:59,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:59,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:59,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:59,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:59,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:59,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:59,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 19:50:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:59,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:59,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:59,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 19:50:59,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:59,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:50:59,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:59,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 19:50:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 19:50:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:50:59,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812940486] [2020-10-28 19:50:59,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:50:59,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:50:59,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178151032] [2020-10-28 19:50:59,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:50:59,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:50:59,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:50:59,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:50:59,598 INFO L87 Difference]: Start difference. First operand 21073 states and 39857 transitions. Second operand 5 states.