/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.2.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:47:25,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:47:25,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:47:25,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:47:25,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:47:25,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:47:25,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:47:25,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:47:25,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:47:25,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:47:25,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:47:25,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:47:25,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:47:25,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:47:25,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:47:25,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:47:25,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:47:25,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:47:25,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:47:25,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:47:25,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:47:25,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:47:25,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:47:25,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:47:25,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:47:25,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:47:25,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:47:25,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:47:25,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:47:25,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:47:25,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:47:25,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:47:25,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:47:25,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:47:25,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:47:25,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:47:25,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:47:25,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:47:25,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:47:25,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:47:25,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:47:25,217 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 19:47:25,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:47:25,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:47:25,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:47:25,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:47:25,249 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:47:25,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:47:25,249 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:47:25,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:47:25,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:47:25,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:47:25,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:47:25,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:47:25,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:47:25,251 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:47:25,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:47:25,252 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:47:25,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:47:25,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:47:25,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:47:25,253 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:47:25,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:47:25,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:47:25,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:47:25,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:47:25,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:47:25,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:47:25,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:47:25,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:47:25,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:47:25,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:47:25,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:47:25,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:47:25,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:47:25,722 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:47:25,723 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:47:25,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/mem_slave_tlm.2.cil.c [2020-10-28 19:47:25,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09645d802/1b4772a748474e0eaaf146e80234ba24/FLAG6490cfde5 [2020-10-28 19:47:26,432 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:47:26,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/mem_slave_tlm.2.cil.c [2020-10-28 19:47:26,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09645d802/1b4772a748474e0eaaf146e80234ba24/FLAG6490cfde5 [2020-10-28 19:47:26,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09645d802/1b4772a748474e0eaaf146e80234ba24 [2020-10-28 19:47:26,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:47:26,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:47:26,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:47:26,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:47:26,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:47:26,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:47:26" (1/1) ... [2020-10-28 19:47:26,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22b014f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:26, skipping insertion in model container [2020-10-28 19:47:26,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:47:26" (1/1) ... [2020-10-28 19:47:26,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:47:26,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:47:27,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:47:27,206 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:47:27,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:47:27,384 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:47:27,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:27 WrapperNode [2020-10-28 19:47:27,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:47:27,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:47:27,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:47:27,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:47:27,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:27" (1/1) ... [2020-10-28 19:47:27,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:27" (1/1) ... [2020-10-28 19:47:27,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:27" (1/1) ... [2020-10-28 19:47:27,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:27" (1/1) ... [2020-10-28 19:47:27,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:27" (1/1) ... [2020-10-28 19:47:27,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:27" (1/1) ... [2020-10-28 19:47:27,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:27" (1/1) ... [2020-10-28 19:47:27,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:47:27,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:47:27,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:47:27,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:47:27,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:27" (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 19:47:27,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:47:27,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:47:27,693 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:47:27,694 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-10-28 19:47:27,694 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_read [2020-10-28 19:47:27,694 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_write [2020-10-28 19:47:27,694 INFO L138 BoogieDeclarations]: Found implementation of procedure m_run [2020-10-28 19:47:27,694 INFO L138 BoogieDeclarations]: Found implementation of procedure s_run [2020-10-28 19:47:27,695 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-10-28 19:47:27,695 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-10-28 19:47:27,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:47:27,695 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:47:27,695 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:47:27,696 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:47:27,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:47:27,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 19:47:27,696 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-10-28 19:47:27,696 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_read [2020-10-28 19:47:27,696 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_write [2020-10-28 19:47:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure m_run [2020-10-28 19:47:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure s_run [2020-10-28 19:47:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-10-28 19:47:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-10-28 19:47:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:47:27,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:47:27,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:47:27,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:47:27,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:47:27,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:47:27,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:47:29,218 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:47:29,218 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-28 19:47:29,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:47:29 BoogieIcfgContainer [2020-10-28 19:47:29,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:47:29,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:47:29,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:47:29,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:47:29,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:47:26" (1/3) ... [2020-10-28 19:47:29,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a15e3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:47:29, skipping insertion in model container [2020-10-28 19:47:29,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:47:27" (2/3) ... [2020-10-28 19:47:29,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a15e3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:47:29, skipping insertion in model container [2020-10-28 19:47:29,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:47:29" (3/3) ... [2020-10-28 19:47:29,234 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.2.cil.c [2020-10-28 19:47:29,250 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:47:29,257 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:47:29,275 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:47:29,312 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:47:29,312 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:47:29,312 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:47:29,313 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:47:29,313 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:47:29,313 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:47:29,313 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:47:29,314 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:47:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states. [2020-10-28 19:47:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 19:47:29,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:47:29,388 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 19:47:29,390 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:47:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:47:29,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2068796717, now seen corresponding path program 1 times [2020-10-28 19:47:29,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:47:29,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987962843] [2020-10-28 19:47:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:47:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:29,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:30,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:30,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:30,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:30,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:30,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:30,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:31,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:31,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:32,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:32,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:32,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:33,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:34,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:34,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:34,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 19:47:34,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:47:34,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:47:34,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:34,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:34,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:47:34,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 19:47:34,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:47:34,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 19:47:35,339 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:47:35,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:47:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:35,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:35,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:35,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:47:35,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:47:35,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:47:35,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:35,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:47:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:47:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:47:35,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:47:35,389 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 19:47:35,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987962843] [2020-10-28 19:47:35,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:47:35,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 19:47:35,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236119194] [2020-10-28 19:47:35,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 19:47:35,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:47:35,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 19:47:35,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 19:47:35,416 INFO L87 Difference]: Start difference. First operand 304 states. Second operand 3 states. [2020-10-28 19:47:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:47:37,199 INFO L93 Difference]: Finished difference Result 628 states and 1113 transitions. [2020-10-28 19:47:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 19:47:37,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-10-28 19:47:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:47:37,219 INFO L225 Difference]: With dead ends: 628 [2020-10-28 19:47:37,219 INFO L226 Difference]: Without dead ends: 343 [2020-10-28 19:47:37,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 19:47:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-28 19:47:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 292. [2020-10-28 19:47:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-28 19:47:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 489 transitions. [2020-10-28 19:47:37,321 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 489 transitions. Word has length 40 [2020-10-28 19:47:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:47:37,322 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 489 transitions. [2020-10-28 19:47:37,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 19:47:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 489 transitions. [2020-10-28 19:47:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 19:47:37,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:47:37,326 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 19:47:37,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:47:37,327 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:47:37,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:47:37,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1284351722, now seen corresponding path program 1 times [2020-10-28 19:47:37,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:47:37,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49495260] [2020-10-28 19:47:37,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:47:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:37,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:37,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:37,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:37,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:37,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:37,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:37,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:38,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:38,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:38,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:38,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:39,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:39,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:39,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:40,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:42,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:42,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 19:47:42,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:47:42,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:47:42,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:42,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:42,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:47:42,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 19:47:42,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 19:47:42,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:47:42,676 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:47:42,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:47:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:42,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:42,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:42,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:47:42,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:47:42,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:47:42,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:42,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:42,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:47:42,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:47:42,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:47:42,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:47:42,708 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 19:47:42,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49495260] [2020-10-28 19:47:42,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:47:42,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:47:42,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475624275] [2020-10-28 19:47:42,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:47:42,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:47:42,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:47:42,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:47:42,713 INFO L87 Difference]: Start difference. First operand 292 states and 489 transitions. Second operand 4 states. [2020-10-28 19:47:42,957 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:47:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:47:45,142 INFO L93 Difference]: Finished difference Result 845 states and 1392 transitions. [2020-10-28 19:47:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:47:45,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-28 19:47:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:47:45,148 INFO L225 Difference]: With dead ends: 845 [2020-10-28 19:47:45,149 INFO L226 Difference]: Without dead ends: 564 [2020-10-28 19:47:45,153 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 19:47:45,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-28 19:47:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 495. [2020-10-28 19:47:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-28 19:47:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 818 transitions. [2020-10-28 19:47:45,274 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 818 transitions. Word has length 41 [2020-10-28 19:47:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:47:45,274 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 818 transitions. [2020-10-28 19:47:45,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:47:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 818 transitions. [2020-10-28 19:47:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 19:47:45,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:47:45,291 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 19:47:45,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:47:45,291 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:47:45,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:47:45,295 INFO L82 PathProgramCache]: Analyzing trace with hash 834737766, now seen corresponding path program 1 times [2020-10-28 19:47:45,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:47:45,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580354153] [2020-10-28 19:47:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:47:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:45,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:45,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:45,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:45,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:45,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:45,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:45,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:46,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:46,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:46,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:46,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:47,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:47,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:47,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:48,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:50,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:50,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 19:47:50,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:47:50,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 19:47:50,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:50,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:50,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:47:50,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 19:47:50,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 19:47:50,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:47:50,633 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:47:50,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:47:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:50,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:50,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:50,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:47:50,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:47:50,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:47:50,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:50,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:50,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:47:50,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:47:50,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:47:50,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:47:50,676 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 19:47:50,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580354153] [2020-10-28 19:47:50,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:47:50,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:47:50,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264192135] [2020-10-28 19:47:50,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:47:50,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:47:50,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:47:50,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:47:50,729 INFO L87 Difference]: Start difference. First operand 495 states and 818 transitions. Second operand 4 states. [2020-10-28 19:47:50,986 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:47:53,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:47:53,056 INFO L93 Difference]: Finished difference Result 1250 states and 2050 transitions. [2020-10-28 19:47:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:47:53,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 19:47:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:47:53,070 INFO L225 Difference]: With dead ends: 1250 [2020-10-28 19:47:53,071 INFO L226 Difference]: Without dead ends: 767 [2020-10-28 19:47:53,074 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 19:47:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-10-28 19:47:53,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 690. [2020-10-28 19:47:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-10-28 19:47:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1119 transitions. [2020-10-28 19:47:53,160 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1119 transitions. Word has length 43 [2020-10-28 19:47:53,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:47:53,160 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 1119 transitions. [2020-10-28 19:47:53,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:47:53,160 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1119 transitions. [2020-10-28 19:47:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 19:47:53,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:47:53,163 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 19:47:53,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:47:53,164 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:47:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:47:53,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2031758206, now seen corresponding path program 1 times [2020-10-28 19:47:53,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:47:53,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563140964] [2020-10-28 19:47:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:47:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:53,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:53,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:53,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:53,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:53,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:53,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:53,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:54,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:54,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:54,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:57,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:57,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 19:47:57,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:47:57,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4263 [2020-10-28 19:47:57,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:57,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:47:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:47:57,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 19:47:57,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:47:57,706 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:47:57,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:47:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:57,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:57,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:47:57,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:47:57,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:47:57,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:47:57,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:47:57,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:47:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:47:57,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:47:57,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:47:57,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:47:57,741 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 19:47:57,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563140964] [2020-10-28 19:47:57,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:47:57,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:47:57,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909696767] [2020-10-28 19:47:57,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:47:57,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:47:57,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:47:57,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:47:57,745 INFO L87 Difference]: Start difference. First operand 690 states and 1119 transitions. Second operand 4 states. [2020-10-28 19:47:58,005 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:47:59,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:47:59,558 INFO L93 Difference]: Finished difference Result 1433 states and 2306 transitions. [2020-10-28 19:47:59,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:47:59,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-28 19:47:59,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:47:59,564 INFO L225 Difference]: With dead ends: 1433 [2020-10-28 19:47:59,565 INFO L226 Difference]: Without dead ends: 753 [2020-10-28 19:47:59,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:47:59,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2020-10-28 19:47:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 690. [2020-10-28 19:47:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-10-28 19:47:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1118 transitions. [2020-10-28 19:47:59,642 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1118 transitions. Word has length 45 [2020-10-28 19:47:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:47:59,643 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 1118 transitions. [2020-10-28 19:47:59,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:47:59,643 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1118 transitions. [2020-10-28 19:47:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 19:47:59,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:47:59,645 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 19:47:59,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:47:59,645 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:47:59,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:47:59,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1868842304, now seen corresponding path program 1 times [2020-10-28 19:47:59,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:47:59,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771877917] [2020-10-28 19:47:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:47:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:47:59,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:59,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:59,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:59,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:47:59,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:00,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:00,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:00,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:00,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:00,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:02,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:02,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 19:48:02,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 19:48:02,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3317 [2020-10-28 19:48:02,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:02,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:02,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:48:02,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:48:02,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 19:48:02,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 19:48:03,341 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:48:03,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:03,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:03,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:03,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:03,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:03,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:48:03,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:03,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:03,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:03,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:03,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:03,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:03,371 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 19:48:03,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771877917] [2020-10-28 19:48:03,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:03,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:03,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137183944] [2020-10-28 19:48:03,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:03,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:03,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:03,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:03,374 INFO L87 Difference]: Start difference. First operand 690 states and 1118 transitions. Second operand 4 states. [2020-10-28 19:48:03,638 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:48:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:05,738 INFO L93 Difference]: Finished difference Result 2071 states and 3356 transitions. [2020-10-28 19:48:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:05,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-28 19:48:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:05,760 INFO L225 Difference]: With dead ends: 2071 [2020-10-28 19:48:05,760 INFO L226 Difference]: Without dead ends: 1402 [2020-10-28 19:48:05,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 19:48:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2020-10-28 19:48:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1274. [2020-10-28 19:48:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2020-10-28 19:48:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 2012 transitions. [2020-10-28 19:48:05,909 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 2012 transitions. Word has length 45 [2020-10-28 19:48:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:05,910 INFO L481 AbstractCegarLoop]: Abstraction has 1274 states and 2012 transitions. [2020-10-28 19:48:05,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 2012 transitions. [2020-10-28 19:48:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 19:48:05,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:05,913 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 19:48:05,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:48:05,914 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:05,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1422915415, now seen corresponding path program 1 times [2020-10-28 19:48:05,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:05,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453025758] [2020-10-28 19:48:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:05,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:06,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:06,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:06,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:06,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:06,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:06,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:08,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:08,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 19:48:08,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:48:08,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2159 [2020-10-28 19:48:08,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:08,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:08,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:48:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:48:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 19:48:08,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:08,428 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:48:08,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:08,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:08,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:08,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:08,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:08,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:48:08,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:08,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:08,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:08,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:08,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:08,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:08,494 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 19:48:08,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453025758] [2020-10-28 19:48:08,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:08,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:08,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335504599] [2020-10-28 19:48:08,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:08,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:08,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:08,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:08,504 INFO L87 Difference]: Start difference. First operand 1274 states and 2012 transitions. Second operand 4 states. [2020-10-28 19:48:08,765 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:48:10,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:10,307 INFO L93 Difference]: Finished difference Result 2639 states and 4188 transitions. [2020-10-28 19:48:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:10,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-28 19:48:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:10,317 INFO L225 Difference]: With dead ends: 2639 [2020-10-28 19:48:10,317 INFO L226 Difference]: Without dead ends: 1385 [2020-10-28 19:48:10,325 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 19:48:10,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2020-10-28 19:48:10,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1274. [2020-10-28 19:48:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2020-10-28 19:48:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1978 transitions. [2020-10-28 19:48:10,467 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1978 transitions. Word has length 45 [2020-10-28 19:48:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:10,467 INFO L481 AbstractCegarLoop]: Abstraction has 1274 states and 1978 transitions. [2020-10-28 19:48:10,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:10,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1978 transitions. [2020-10-28 19:48:10,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 19:48:10,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:10,469 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 19:48:10,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:48:10,469 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:10,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:10,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1439762879, now seen corresponding path program 1 times [2020-10-28 19:48:10,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:10,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57028163] [2020-10-28 19:48:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:10,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:10,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:10,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:10,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:10,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:10,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:11,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:11,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:11,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:11,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:11,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:12,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:12,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 19:48:12,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:48:12,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2127 [2020-10-28 19:48:12,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:12,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:12,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:12,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 19:48:12,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 19:48:12,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:12,866 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:48:12,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:12,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:12,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:12,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:12,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:12,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:48:12,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:12,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:12,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:12,894 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 19:48:12,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57028163] [2020-10-28 19:48:12,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:12,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:12,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484984911] [2020-10-28 19:48:12,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:12,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:12,897 INFO L87 Difference]: Start difference. First operand 1274 states and 1978 transitions. Second operand 4 states. [2020-10-28 19:48:13,141 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:48:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:15,277 INFO L93 Difference]: Finished difference Result 3086 states and 4820 transitions. [2020-10-28 19:48:15,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:15,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-28 19:48:15,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:15,290 INFO L225 Difference]: With dead ends: 3086 [2020-10-28 19:48:15,290 INFO L226 Difference]: Without dead ends: 1827 [2020-10-28 19:48:15,299 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 19:48:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2020-10-28 19:48:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1663. [2020-10-28 19:48:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1663 states. [2020-10-28 19:48:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2418 transitions. [2020-10-28 19:48:15,487 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2418 transitions. Word has length 47 [2020-10-28 19:48:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:15,487 INFO L481 AbstractCegarLoop]: Abstraction has 1663 states and 2418 transitions. [2020-10-28 19:48:15,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2418 transitions. [2020-10-28 19:48:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 19:48:15,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:15,489 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 19:48:15,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:48:15,490 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:15,490 INFO L82 PathProgramCache]: Analyzing trace with hash -41708115, now seen corresponding path program 1 times [2020-10-28 19:48:15,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:15,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835687998] [2020-10-28 19:48:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:15,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:15,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:15,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:15,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:15,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:17,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:17,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 19:48:17,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:48:17,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1665 [2020-10-28 19:48:17,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:17,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:17,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:17,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 19:48:17,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 19:48:17,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:17,425 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:48:17,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:17,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:17,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:17,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:17,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:17,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:48:17,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:17,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:17,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:17,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:17,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:17,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:48:17,461 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 19:48:17,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835687998] [2020-10-28 19:48:17,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:17,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:17,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848961412] [2020-10-28 19:48:17,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:17,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:17,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:17,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:17,476 INFO L87 Difference]: Start difference. First operand 1663 states and 2418 transitions. Second operand 4 states. [2020-10-28 19:48:17,802 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:48:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:20,299 INFO L93 Difference]: Finished difference Result 3855 states and 5687 transitions. [2020-10-28 19:48:20,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:20,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-28 19:48:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:20,318 INFO L225 Difference]: With dead ends: 3855 [2020-10-28 19:48:20,318 INFO L226 Difference]: Without dead ends: 2211 [2020-10-28 19:48:20,329 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 19:48:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2020-10-28 19:48:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2038. [2020-10-28 19:48:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2038 states. [2020-10-28 19:48:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 2943 transitions. [2020-10-28 19:48:20,567 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 2943 transitions. Word has length 49 [2020-10-28 19:48:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:20,567 INFO L481 AbstractCegarLoop]: Abstraction has 2038 states and 2943 transitions. [2020-10-28 19:48:20,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:20,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 2943 transitions. [2020-10-28 19:48:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 19:48:20,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:20,570 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 19:48:20,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:48:20,596 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:20,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:20,597 INFO L82 PathProgramCache]: Analyzing trace with hash -158145154, now seen corresponding path program 1 times [2020-10-28 19:48:20,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:20,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873885137] [2020-10-28 19:48:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:20,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:20,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:20,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:20,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:20,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:20,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:22,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:22,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 19:48:22,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:48:22,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1448 [2020-10-28 19:48:22,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:22,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:22,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 19:48:22,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:48:22,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 19:48:22,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:22,326 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:48:22,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:22,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:22,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:22,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:22,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:22,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:48:22,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:22,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:22,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:22,348 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 19:48:22,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873885137] [2020-10-28 19:48:22,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:22,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:22,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111235615] [2020-10-28 19:48:22,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:22,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:22,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:22,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:22,351 INFO L87 Difference]: Start difference. First operand 2038 states and 2943 transitions. Second operand 4 states. [2020-10-28 19:48:22,618 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:48:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:24,822 INFO L93 Difference]: Finished difference Result 4638 states and 6809 transitions. [2020-10-28 19:48:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:24,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-28 19:48:24,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:24,839 INFO L225 Difference]: With dead ends: 4638 [2020-10-28 19:48:24,839 INFO L226 Difference]: Without dead ends: 2618 [2020-10-28 19:48:24,851 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 19:48:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2020-10-28 19:48:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2398. [2020-10-28 19:48:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2398 states. [2020-10-28 19:48:25,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 3452 transitions. [2020-10-28 19:48:25,128 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 3452 transitions. Word has length 50 [2020-10-28 19:48:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:25,128 INFO L481 AbstractCegarLoop]: Abstraction has 2398 states and 3452 transitions. [2020-10-28 19:48:25,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 3452 transitions. [2020-10-28 19:48:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 19:48:25,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:25,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:48:25,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:48:25,131 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:25,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:25,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2134948684, now seen corresponding path program 1 times [2020-10-28 19:48:25,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:25,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718814170] [2020-10-28 19:48:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:25,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:25,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:25,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:25,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:28,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:28,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 19:48:28,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:48:28,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3060 [2020-10-28 19:48:28,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:28,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 19:48:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:48:28,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:28,469 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:48:28,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:28,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:28,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:28,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:28,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:28,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:48:28,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:28,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:28,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:28,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:28,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:28,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:28,493 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 19:48:28,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718814170] [2020-10-28 19:48:28,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:28,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:28,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562341110] [2020-10-28 19:48:28,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:28,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:28,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:28,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:28,497 INFO L87 Difference]: Start difference. First operand 2398 states and 3452 transitions. Second operand 4 states. [2020-10-28 19:48:28,769 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:48:31,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:31,260 INFO L93 Difference]: Finished difference Result 6923 states and 10223 transitions. [2020-10-28 19:48:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:31,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-28 19:48:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:31,292 INFO L225 Difference]: With dead ends: 6923 [2020-10-28 19:48:31,292 INFO L226 Difference]: Without dead ends: 4543 [2020-10-28 19:48:31,307 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 19:48:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2020-10-28 19:48:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 4177. [2020-10-28 19:48:31,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4177 states. [2020-10-28 19:48:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4177 states to 4177 states and 6017 transitions. [2020-10-28 19:48:31,827 INFO L78 Accepts]: Start accepts. Automaton has 4177 states and 6017 transitions. Word has length 51 [2020-10-28 19:48:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:31,827 INFO L481 AbstractCegarLoop]: Abstraction has 4177 states and 6017 transitions. [2020-10-28 19:48:31,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 4177 states and 6017 transitions. [2020-10-28 19:48:31,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 19:48:31,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:31,830 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] [2020-10-28 19:48:31,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:48:31,830 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:31,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1000538618, now seen corresponding path program 1 times [2020-10-28 19:48:31,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:31,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807753300] [2020-10-28 19:48:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:31,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:32,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:33,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:33,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 19:48:33,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:48:33,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1213 [2020-10-28 19:48:33,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:33,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:33,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 19:48:33,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:48:33,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 19:48:33,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:33,381 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:48:33,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:33,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:33,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:33,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:33,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:33,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:48:33,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:33,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:33,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:48:33,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:33,414 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 19:48:33,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807753300] [2020-10-28 19:48:33,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:33,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:48:33,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125796745] [2020-10-28 19:48:33,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:48:33,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:33,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:48:33,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:48:33,416 INFO L87 Difference]: Start difference. First operand 4177 states and 6017 transitions. Second operand 7 states. [2020-10-28 19:48:33,721 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:48:34,540 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 19:48:34,858 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:48:36,763 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:48:37,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:37,476 INFO L93 Difference]: Finished difference Result 10210 states and 15278 transitions. [2020-10-28 19:48:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 19:48:37,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-28 19:48:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:37,521 INFO L225 Difference]: With dead ends: 10210 [2020-10-28 19:48:37,521 INFO L226 Difference]: Without dead ends: 7468 [2020-10-28 19:48:37,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-28 19:48:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2020-10-28 19:48:38,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 6770. [2020-10-28 19:48:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6770 states. [2020-10-28 19:48:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6770 states to 6770 states and 10157 transitions. [2020-10-28 19:48:38,420 INFO L78 Accepts]: Start accepts. Automaton has 6770 states and 10157 transitions. Word has length 52 [2020-10-28 19:48:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:38,421 INFO L481 AbstractCegarLoop]: Abstraction has 6770 states and 10157 transitions. [2020-10-28 19:48:38,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:48:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 6770 states and 10157 transitions. [2020-10-28 19:48:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 19:48:38,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:38,424 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 19:48:38,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:48:38,424 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:38,425 INFO L82 PathProgramCache]: Analyzing trace with hash 994998127, now seen corresponding path program 1 times [2020-10-28 19:48:38,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:38,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895482352] [2020-10-28 19:48:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:38,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:38,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:38,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:38,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:40,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:40,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 19:48:40,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:48:40,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2254 [2020-10-28 19:48:40,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:40,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 19:48:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:48:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 19:48:40,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:40,995 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:48:40,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:41,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:41,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:41,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:41,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:41,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:48:41,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:41,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:41,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:41,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:41,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:48:41,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:41,033 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 19:48:41,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895482352] [2020-10-28 19:48:41,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:41,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:48:41,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649476920] [2020-10-28 19:48:41,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:48:41,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:41,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:48:41,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:48:41,036 INFO L87 Difference]: Start difference. First operand 6770 states and 10157 transitions. Second operand 7 states. [2020-10-28 19:48:41,311 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:48:42,221 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 19:48:42,552 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:48:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:44,866 INFO L93 Difference]: Finished difference Result 12152 states and 18283 transitions. [2020-10-28 19:48:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 19:48:44,867 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-28 19:48:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:44,905 INFO L225 Difference]: With dead ends: 12152 [2020-10-28 19:48:44,905 INFO L226 Difference]: Without dead ends: 7419 [2020-10-28 19:48:44,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-28 19:48:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7419 states. [2020-10-28 19:48:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7419 to 6746. [2020-10-28 19:48:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6746 states. [2020-10-28 19:48:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6746 states to 6746 states and 10085 transitions. [2020-10-28 19:48:45,792 INFO L78 Accepts]: Start accepts. Automaton has 6746 states and 10085 transitions. Word has length 53 [2020-10-28 19:48:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:45,793 INFO L481 AbstractCegarLoop]: Abstraction has 6746 states and 10085 transitions. [2020-10-28 19:48:45,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:48:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6746 states and 10085 transitions. [2020-10-28 19:48:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 19:48:45,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:45,800 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 19:48:45,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:48:45,800 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:45,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:45,801 INFO L82 PathProgramCache]: Analyzing trace with hash 150376114, now seen corresponding path program 1 times [2020-10-28 19:48:45,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:45,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051094743] [2020-10-28 19:48:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:45,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:45,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:46,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:46,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 19:48:46,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:48:46,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-28 19:48:46,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:46,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:46,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:46,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 19:48:46,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 19:48:46,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:46,436 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:48:46,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:46,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:46,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:46,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:46,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:48:46,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:46,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:46,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:46,459 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 19:48:46,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051094743] [2020-10-28 19:48:46,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:46,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:46,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945596695] [2020-10-28 19:48:46,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:46,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:46,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:46,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:46,462 INFO L87 Difference]: Start difference. First operand 6746 states and 10085 transitions. Second operand 4 states. [2020-10-28 19:48:46,941 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:48:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:49,866 INFO L93 Difference]: Finished difference Result 11273 states and 17774 transitions. [2020-10-28 19:48:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:49,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-28 19:48:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:49,915 INFO L225 Difference]: With dead ends: 11273 [2020-10-28 19:48:49,915 INFO L226 Difference]: Without dead ends: 11268 [2020-10-28 19:48:49,921 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 19:48:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11268 states. [2020-10-28 19:48:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11268 to 10301. [2020-10-28 19:48:51,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10301 states. [2020-10-28 19:48:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10301 states to 10301 states and 16472 transitions. [2020-10-28 19:48:51,176 INFO L78 Accepts]: Start accepts. Automaton has 10301 states and 16472 transitions. Word has length 64 [2020-10-28 19:48:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:51,176 INFO L481 AbstractCegarLoop]: Abstraction has 10301 states and 16472 transitions. [2020-10-28 19:48:51,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 10301 states and 16472 transitions. [2020-10-28 19:48:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:48:51,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:51,199 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 19:48:51,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:48:51,199 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1995180681, now seen corresponding path program 1 times [2020-10-28 19:48:51,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:51,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735238206] [2020-10-28 19:48:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:51,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:51,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:51,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:51,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 19:48:51,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:48:51,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-28 19:48:51,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:51,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:51,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:48:51,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 19:48:51,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 19:48:51,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:51,892 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:48:51,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:51,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:51,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:51,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:51,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:51,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:48:51,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:51,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:51,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:51,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:51,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:51,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:51,915 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 19:48:51,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735238206] [2020-10-28 19:48:51,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:51,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:48:51,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544312360] [2020-10-28 19:48:51,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:48:51,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:51,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:48:51,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:48:51,917 INFO L87 Difference]: Start difference. First operand 10301 states and 16472 transitions. Second operand 4 states. [2020-10-28 19:48:52,269 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:48:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:48:54,779 INFO L93 Difference]: Finished difference Result 22134 states and 36694 transitions. [2020-10-28 19:48:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:48:54,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-28 19:48:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:48:54,829 INFO L225 Difference]: With dead ends: 22134 [2020-10-28 19:48:54,829 INFO L226 Difference]: Without dead ends: 11860 [2020-10-28 19:48:55,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:48:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11860 states. [2020-10-28 19:48:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11860 to 9769. [2020-10-28 19:48:55,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9769 states. [2020-10-28 19:48:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9769 states to 9769 states and 15320 transitions. [2020-10-28 19:48:56,185 INFO L78 Accepts]: Start accepts. Automaton has 9769 states and 15320 transitions. Word has length 78 [2020-10-28 19:48:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:48:56,185 INFO L481 AbstractCegarLoop]: Abstraction has 9769 states and 15320 transitions. [2020-10-28 19:48:56,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:48:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 9769 states and 15320 transitions. [2020-10-28 19:48:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:48:56,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:48:56,199 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] [2020-10-28 19:48:56,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:48:56,200 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:48:56,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:48:56,201 INFO L82 PathProgramCache]: Analyzing trace with hash 917056119, now seen corresponding path program 1 times [2020-10-28 19:48:56,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:48:56,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802861454] [2020-10-28 19:48:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:48:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:56,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:56,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:56,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:56,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 19:48:56,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:48:56,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-28 19:48:56,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:56,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:56,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:48:56,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 19:48:56,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 19:48:56,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:56,892 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:48:56,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:48:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:56,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:56,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:56,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:48:56,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:56,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:48:56,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:56,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:56,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:48:56,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:56,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:48:56,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:57,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 19:48:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:48:57,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:48:57,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:48:57,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 19:48:57,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:48:57,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:48:57,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:48:57,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:48:57,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:48:57,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:48:57,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 19:48:57,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:48:57,089 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 19:48:57,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802861454] [2020-10-28 19:48:57,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:48:57,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:48:57,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669642434] [2020-10-28 19:48:57,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:48:57,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:48:57,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:48:57,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:48:57,091 INFO L87 Difference]: Start difference. First operand 9769 states and 15320 transitions. Second operand 7 states. [2020-10-28 19:48:57,562 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 19:48:57,782 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-10-28 19:48:58,495 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:49:00,090 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 19:49:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:49:02,295 INFO L93 Difference]: Finished difference Result 21496 states and 35211 transitions. [2020-10-28 19:49:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 19:49:02,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-28 19:49:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:49:02,366 INFO L225 Difference]: With dead ends: 21496 [2020-10-28 19:49:02,366 INFO L226 Difference]: Without dead ends: 17109 [2020-10-28 19:49:02,412 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 19:49:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17109 states. [2020-10-28 19:49:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17109 to 14525. [2020-10-28 19:49:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14525 states. [2020-10-28 19:49:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14525 states to 14525 states and 23701 transitions. [2020-10-28 19:49:04,259 INFO L78 Accepts]: Start accepts. Automaton has 14525 states and 23701 transitions. Word has length 80 [2020-10-28 19:49:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:49:04,259 INFO L481 AbstractCegarLoop]: Abstraction has 14525 states and 23701 transitions. [2020-10-28 19:49:04,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:49:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 14525 states and 23701 transitions. [2020-10-28 19:49:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 19:49:04,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:49:04,271 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] [2020-10-28 19:49:04,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:49:04,272 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:49:04,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:49:04,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1592959342, now seen corresponding path program 1 times [2020-10-28 19:49:04,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:49:04,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819414951] [2020-10-28 19:49:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:49:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:04,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:04,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:04,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 19:49:04,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:04,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-28 19:49:04,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:04,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 19:49:04,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 19:49:04,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 19:49:04,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:04,890 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:49:04,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:49:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:04,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:04,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:04,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:49:04,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:04,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:49:04,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:04,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:04,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:04,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:04,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:04,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:04,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 19:49:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:05,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:05,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:05,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 19:49:05,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:05,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 19:49:05,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:05,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:05,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:49:05,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:05,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 19:49:05,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:05,085 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 19:49:05,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819414951] [2020-10-28 19:49:05,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:49:05,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 19:49:05,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332533733] [2020-10-28 19:49:05,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 19:49:05,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:49:05,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 19:49:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:49:05,087 INFO L87 Difference]: Start difference. First operand 14525 states and 23701 transitions. Second operand 10 states. [2020-10-28 19:49:05,441 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:49:05,930 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:49:06,272 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 19:49:06,936 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:49:07,291 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 19:49:07,495 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-28 19:49:09,538 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 19:49:09,971 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 19:49:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:49:13,543 INFO L93 Difference]: Finished difference Result 29746 states and 50846 transitions. [2020-10-28 19:49:13,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 19:49:13,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-28 19:49:13,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:49:13,621 INFO L225 Difference]: With dead ends: 29746 [2020-10-28 19:49:13,621 INFO L226 Difference]: Without dead ends: 22176 [2020-10-28 19:49:13,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-28 19:49:13,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22176 states. [2020-10-28 19:49:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22176 to 18555. [2020-10-28 19:49:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18555 states. [2020-10-28 19:49:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18555 states to 18555 states and 31712 transitions. [2020-10-28 19:49:16,611 INFO L78 Accepts]: Start accepts. Automaton has 18555 states and 31712 transitions. Word has length 81 [2020-10-28 19:49:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:49:16,612 INFO L481 AbstractCegarLoop]: Abstraction has 18555 states and 31712 transitions. [2020-10-28 19:49:16,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 19:49:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 18555 states and 31712 transitions. [2020-10-28 19:49:16,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 19:49:16,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:49:16,629 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] [2020-10-28 19:49:16,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 19:49:16,630 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:49:16,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:49:16,630 INFO L82 PathProgramCache]: Analyzing trace with hash 818359731, now seen corresponding path program 1 times [2020-10-28 19:49:16,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:49:16,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453564419] [2020-10-28 19:49:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:49:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:16,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:16,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:16,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:16,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:17,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:18,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:18,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:21,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:21,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 19:49:21,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:49:21,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 19:49:21,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:21,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:49:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 19:49:21,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 19:49:21,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:21,953 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:49:21,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:49:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:21,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:21,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:21,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:49:21,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:21,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:49:21,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:21,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:21,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:21,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:21,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:21,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:22,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 19:49:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:22,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:22,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:22,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 19:49:22,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:22,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:49:22,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:22,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:22,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:49:22,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:22,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 19:49:22,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:22,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 19:49:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:22,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:22,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:22,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 19:49:22,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:22,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:49:22,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:22,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 19:49:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:22,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:22,136 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 19:49:22,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453564419] [2020-10-28 19:49:22,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:49:22,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 19:49:22,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961645751] [2020-10-28 19:49:22,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:49:22,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:49:22,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:49:22,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:49:22,139 INFO L87 Difference]: Start difference. First operand 18555 states and 31712 transitions. Second operand 5 states. [2020-10-28 19:49:22,505 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:49:27,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:49:27,249 INFO L93 Difference]: Finished difference Result 39607 states and 72041 transitions. [2020-10-28 19:49:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:49:27,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2020-10-28 19:49:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:49:27,340 INFO L225 Difference]: With dead ends: 39607 [2020-10-28 19:49:27,341 INFO L226 Difference]: Without dead ends: 21057 [2020-10-28 19:49:27,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:49:27,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21057 states. [2020-10-28 19:49:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21057 to 20039. [2020-10-28 19:49:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20039 states. [2020-10-28 19:49:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20039 states to 20039 states and 33656 transitions. [2020-10-28 19:49:30,496 INFO L78 Accepts]: Start accepts. Automaton has 20039 states and 33656 transitions. Word has length 91 [2020-10-28 19:49:30,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:49:30,497 INFO L481 AbstractCegarLoop]: Abstraction has 20039 states and 33656 transitions. [2020-10-28 19:49:30,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:49:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 20039 states and 33656 transitions. [2020-10-28 19:49:30,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 19:49:30,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:49:30,511 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] [2020-10-28 19:49:30,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 19:49:30,511 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:49:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:49:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2000065494, now seen corresponding path program 1 times [2020-10-28 19:49:30,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:49:30,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471600557] [2020-10-28 19:49:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:49:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:30,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:30,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:30,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:30,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:31,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:31,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:31,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:32,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:32,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:35,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:35,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 19:49:35,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:49:35,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 19:49:35,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:35,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:35,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 19:49:35,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:49:35,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 19:49:35,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:35,797 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:49:35,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:49:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:35,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:35,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:35,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:49:35,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:35,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 19:49:35,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:35,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:35,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:35,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:35,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:35,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:35,976 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 19:49:35,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 19:49:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:35,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:36,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:36,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 19:49:36,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:36,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 19:49:36,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:36,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:49:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 19:49:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:49:36,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:36,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 19:49:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:36,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:36,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:36,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 19:49:36,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:36,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:49:36,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:36,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:36,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:49:36,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 19:49:36,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 19:49:36,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:36,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 19:49:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:36,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:36,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:36,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 19:49:36,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:36,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:49:36,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:36,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:36,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:36,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 19:49:36,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:36,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:36,236 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 19:49:36,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471600557] [2020-10-28 19:49:36,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:49:36,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 19:49:36,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974134327] [2020-10-28 19:49:36,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:49:36,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:49:36,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:49:36,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:49:36,238 INFO L87 Difference]: Start difference. First operand 20039 states and 33656 transitions. Second operand 8 states. [2020-10-28 19:49:36,514 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:49:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:49:41,000 INFO L93 Difference]: Finished difference Result 39249 states and 69928 transitions. [2020-10-28 19:49:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:49:41,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-10-28 19:49:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:49:41,070 INFO L225 Difference]: With dead ends: 39249 [2020-10-28 19:49:41,070 INFO L226 Difference]: Without dead ends: 19350 [2020-10-28 19:49:41,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2020-10-28 19:49:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19350 states. [2020-10-28 19:49:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19350 to 18334. [2020-10-28 19:49:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18334 states. [2020-10-28 19:49:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18334 states to 18334 states and 30154 transitions. [2020-10-28 19:49:43,721 INFO L78 Accepts]: Start accepts. Automaton has 18334 states and 30154 transitions. Word has length 106 [2020-10-28 19:49:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:49:43,721 INFO L481 AbstractCegarLoop]: Abstraction has 18334 states and 30154 transitions. [2020-10-28 19:49:43,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:49:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 18334 states and 30154 transitions. [2020-10-28 19:49:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 19:49:43,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:49:43,729 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] [2020-10-28 19:49:43,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 19:49:43,730 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:49:43,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:49:43,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2125205948, now seen corresponding path program 1 times [2020-10-28 19:49:43,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:49:43,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556225723] [2020-10-28 19:49:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:49:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:43,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:43,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:43,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:43,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:43,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:44,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:46,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:46,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:48,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:48,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:48,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 19:49:48,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:49:48,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:49:48,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:48,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:48,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 19:49:48,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:49:48,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 19:49:48,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:49,056 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:49:49,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:49:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:49,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:49,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:49,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:49:49,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:49,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 19:49:49,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:49,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:49,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:49:49,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:49,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:49:49,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:49,234 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 19:49:49,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 19:49:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:49,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:49,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:49,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 19:49:49,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:49,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 19:49:49,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:49,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:49,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:49:49,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 19:49:49,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 19:49:49,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:49,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 19:49:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:49,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:49,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:49,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 19:49:49,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:49,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:49:49,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:49,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:49:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:49:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 19:49:49,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:49,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 19:49:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:49,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:49,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:49:49,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 19:49:49,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:49:49,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:49:49,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:49:49,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:49:49,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:49:49,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:49:49,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 19:49:49,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:49:49,495 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 19:49:49,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556225723] [2020-10-28 19:49:49,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:49:49,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 19:49:49,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303585726] [2020-10-28 19:49:49,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:49:49,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:49:49,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:49:49,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:49:49,500 INFO L87 Difference]: Start difference. First operand 18334 states and 30154 transitions. Second operand 8 states. [2020-10-28 19:49:49,738 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:49:50,448 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-28 19:49:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:49:54,222 INFO L93 Difference]: Finished difference Result 33563 states and 64433 transitions. [2020-10-28 19:49:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:49:54,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-10-28 19:49:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:49:54,299 INFO L225 Difference]: With dead ends: 33563 [2020-10-28 19:49:54,299 INFO L226 Difference]: Without dead ends: 15369 [2020-10-28 19:49:54,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-28 19:49:54,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15369 states. [2020-10-28 19:49:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15369 to 12701. [2020-10-28 19:49:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12701 states. [2020-10-28 19:49:56,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12701 states to 12701 states and 20173 transitions. [2020-10-28 19:49:56,638 INFO L78 Accepts]: Start accepts. Automaton has 12701 states and 20173 transitions. Word has length 109 [2020-10-28 19:49:56,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:49:56,638 INFO L481 AbstractCegarLoop]: Abstraction has 12701 states and 20173 transitions. [2020-10-28 19:49:56,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:49:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 12701 states and 20173 transitions. [2020-10-28 19:49:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 19:49:56,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:49:56,649 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] [2020-10-28 19:49:56,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 19:49:56,650 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:49:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:49:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash -718217132, now seen corresponding path program 1 times [2020-10-28 19:49:56,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:49:56,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220346026] [2020-10-28 19:49:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:49:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:49:56,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:56,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:56,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:56,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:56,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:56,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:57,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:57,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:57,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:58,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:58,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:58,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:58,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:49:58,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:01,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:01,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-28 19:50:01,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:50:01,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 19:50:01,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:01,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:01,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:01,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 102 [2020-10-28 19:50:01,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 19:50:01,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:01,938 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:50:01,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:50:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:01,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:01,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:01,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:50:01,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:01,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 19:50:01,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:01,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:01,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:01,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:01,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:02,112 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 19:50:02,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 19:50:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:02,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:02,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:02,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 19:50:02,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:02,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:50:02,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:02,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:02,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:02,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:02,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:02,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:02,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 19:50:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:02,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:02,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:02,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 19:50:02,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:02,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 19:50:02,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:02,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:02,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:02,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:02,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:02,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:02,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 19:50:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:02,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:02,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:02,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 19:50:02,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:02,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:50:02,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:02,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:02,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:02,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:02,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 19:50:02,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:02,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-28 19:50:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:02,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:02,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:02,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:02,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 19:50:02,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:50:02,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:50:02,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:02,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:02,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:02,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:50:02,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 19:50:02,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:02,387 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 19:50:02,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220346026] [2020-10-28 19:50:02,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:50:02,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 19:50:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674425987] [2020-10-28 19:50:02,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:50:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:50:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:50:02,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:50:02,389 INFO L87 Difference]: Start difference. First operand 12701 states and 20173 transitions. Second operand 8 states. [2020-10-28 19:50:02,663 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:50:03,866 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:50:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:50:09,818 INFO L93 Difference]: Finished difference Result 32802 states and 62415 transitions. [2020-10-28 19:50:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 19:50:09,819 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 143 [2020-10-28 19:50:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:50:09,892 INFO L225 Difference]: With dead ends: 32802 [2020-10-28 19:50:09,892 INFO L226 Difference]: Without dead ends: 21054 [2020-10-28 19:50:10,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-28 19:50:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21054 states. [2020-10-28 19:50:13,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21054 to 20176. [2020-10-28 19:50:13,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20176 states. [2020-10-28 19:50:13,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20176 states to 20176 states and 36034 transitions. [2020-10-28 19:50:13,465 INFO L78 Accepts]: Start accepts. Automaton has 20176 states and 36034 transitions. Word has length 143 [2020-10-28 19:50:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:50:13,466 INFO L481 AbstractCegarLoop]: Abstraction has 20176 states and 36034 transitions. [2020-10-28 19:50:13,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:50:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 20176 states and 36034 transitions. [2020-10-28 19:50:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 19:50:13,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:50:13,482 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 19:50:13,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 19:50:13,482 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:50:13,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:50:13,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1247124771, now seen corresponding path program 1 times [2020-10-28 19:50:13,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:50:13,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923535507] [2020-10-28 19:50:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:50:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:13,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:13,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:13,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:13,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:16,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:16,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 19:50:16,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:50:16,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2500 [2020-10-28 19:50:16,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:16,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:50:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 19:50:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 19:50:16,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:16,259 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:50:16,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:50:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:16,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:16,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:16,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:50:16,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:16,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 19:50:16,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:16,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:16,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:16,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:16,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:16,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:16,284 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 19:50:16,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923535507] [2020-10-28 19:50:16,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:50:16,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 19:50:16,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459903126] [2020-10-28 19:50:16,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:50:16,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:50:16,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:50:16,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:50:16,286 INFO L87 Difference]: Start difference. First operand 20176 states and 36034 transitions. Second operand 5 states. [2020-10-28 19:50:16,631 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:50:20,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:50:20,745 INFO L93 Difference]: Finished difference Result 37505 states and 74194 transitions. [2020-10-28 19:50:20,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:50:20,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2020-10-28 19:50:20,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:50:20,823 INFO L225 Difference]: With dead ends: 37505 [2020-10-28 19:50:20,823 INFO L226 Difference]: Without dead ends: 21256 [2020-10-28 19:50:21,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:50:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21256 states. [2020-10-28 19:50:24,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21256 to 20351. [2020-10-28 19:50:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20351 states. [2020-10-28 19:50:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20351 states to 20351 states and 36028 transitions. [2020-10-28 19:50:24,556 INFO L78 Accepts]: Start accepts. Automaton has 20351 states and 36028 transitions. Word has length 119 [2020-10-28 19:50:24,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:50:24,557 INFO L481 AbstractCegarLoop]: Abstraction has 20351 states and 36028 transitions. [2020-10-28 19:50:24,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:50:24,557 INFO L276 IsEmpty]: Start isEmpty. Operand 20351 states and 36028 transitions. [2020-10-28 19:50:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 19:50:24,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:50:24,566 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] [2020-10-28 19:50:24,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 19:50:24,566 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:50:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:50:24,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1450323820, now seen corresponding path program 1 times [2020-10-28 19:50:24,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:50:24,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507471212] [2020-10-28 19:50:24,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:50:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:24,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:24,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:24,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:26,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:26,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 19:50:26,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 19:50:26,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2041 [2020-10-28 19:50:26,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:26,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:26,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:26,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 19:50:26,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 19:50:26,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:26,884 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:50:26,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:50:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:26,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:26,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:26,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:50:26,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:26,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 19:50:26,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:26,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:26,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:26,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 19:50:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:26,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:27,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:27,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 19:50:27,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:27,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:50:27,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:27,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:27,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:27,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 19:50:27,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 19:50:27,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:27,051 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 19:50:27,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507471212] [2020-10-28 19:50:27,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:50:27,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:50:27,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72826181] [2020-10-28 19:50:27,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:50:27,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:50:27,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:50:27,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:50:27,059 INFO L87 Difference]: Start difference. First operand 20351 states and 36028 transitions. Second operand 5 states. [2020-10-28 19:50:27,460 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:50:32,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:50:32,117 INFO L93 Difference]: Finished difference Result 39802 states and 86536 transitions. [2020-10-28 19:50:32,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:50:32,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-28 19:50:32,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:50:32,213 INFO L225 Difference]: With dead ends: 39802 [2020-10-28 19:50:32,213 INFO L226 Difference]: Without dead ends: 19792 [2020-10-28 19:50:32,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:50:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19792 states. [2020-10-28 19:50:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19792 to 18707. [2020-10-28 19:50:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18707 states. [2020-10-28 19:50:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18707 states to 18707 states and 38772 transitions. [2020-10-28 19:50:36,156 INFO L78 Accepts]: Start accepts. Automaton has 18707 states and 38772 transitions. Word has length 122 [2020-10-28 19:50:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:50:36,157 INFO L481 AbstractCegarLoop]: Abstraction has 18707 states and 38772 transitions. [2020-10-28 19:50:36,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:50:36,157 INFO L276 IsEmpty]: Start isEmpty. Operand 18707 states and 38772 transitions. [2020-10-28 19:50:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-28 19:50:36,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:50:36,167 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:50:36,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 19:50:36,167 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:50:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:50:36,167 INFO L82 PathProgramCache]: Analyzing trace with hash 146330706, now seen corresponding path program 1 times [2020-10-28 19:50:36,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:50:36,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806180622] [2020-10-28 19:50:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:50:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:36,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:36,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:36,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:36,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:36,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:36,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:36,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:37,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:38,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:38,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:38,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:38,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:38,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:38,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:38,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:38,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:41,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:41,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-28 19:50:41,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 19:50:41,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:50:41,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:41,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-28 19:50:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 19:50:41,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:41,476 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:50:41,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:50:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:41,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:41,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:41,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:50:41,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:41,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:50:41,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:41,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:41,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:41,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:41,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:41,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:41,658 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 19:50:41,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 19:50:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:41,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:41,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:41,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 19:50:41,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:41,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:50:41,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:41,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:41,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:41,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:41,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:41,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:41,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 19:50:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:41,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:41,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:41,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 19:50:41,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:41,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 19:50:41,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:41,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:41,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:50:41,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:41,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:50:41,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:41,920 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-28 19:50:41,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 19:50:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:41,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:41,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:41,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 19:50:41,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:50:41,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:50:41,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:41,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:41,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:41,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:50:41,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 19:50:41,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:41,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-28 19:50:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:41,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:41,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:41,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:50:41,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 19:50:41,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:50:41,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:50:41,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:50:41,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:50:41,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:50:41,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 19:50:41,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 19:50:41,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:50:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-28 19:50:42,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806180622] [2020-10-28 19:50:42,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:50:42,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 19:50:42,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187960442] [2020-10-28 19:50:42,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:50:42,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:50:42,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:50:42,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:50:42,016 INFO L87 Difference]: Start difference. First operand 18707 states and 38772 transitions. Second operand 8 states. [2020-10-28 19:50:42,295 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:50:42,994 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:50:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:50:49,280 INFO L93 Difference]: Finished difference Result 35663 states and 88844 transitions. [2020-10-28 19:50:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 19:50:49,281 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 157 [2020-10-28 19:50:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:50:49,383 INFO L225 Difference]: With dead ends: 35663 [2020-10-28 19:50:49,384 INFO L226 Difference]: Without dead ends: 17384 [2020-10-28 19:50:49,617 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 19:50:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17384 states. [2020-10-28 19:50:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17384 to 16724. [2020-10-28 19:50:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16724 states. [2020-10-28 19:50:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16724 states to 16724 states and 35900 transitions. [2020-10-28 19:50:53,332 INFO L78 Accepts]: Start accepts. Automaton has 16724 states and 35900 transitions. Word has length 157 [2020-10-28 19:50:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:50:53,333 INFO L481 AbstractCegarLoop]: Abstraction has 16724 states and 35900 transitions. [2020-10-28 19:50:53,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:50:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 16724 states and 35900 transitions. [2020-10-28 19:50:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-28 19:50:53,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:50:53,343 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:50:53,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 19:50:53,343 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:50:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:50:53,344 INFO L82 PathProgramCache]: Analyzing trace with hash 106834454, now seen corresponding path program 1 times [2020-10-28 19:50:53,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:50:53,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301483079] [2020-10-28 19:50:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:50:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:50:53,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:53,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:53,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:53,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:53,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:53,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:53,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:53,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:53,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:53,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:50:54,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking...