/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=SHALLOWEST --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/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:12:29,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:12:29,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:12:29,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:12:29,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:12:29,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:12:29,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:12:29,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:12:29,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:12:29,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:12:29,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:12:30,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:12:30,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:12:30,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:12:30,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:12:30,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:12:30,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:12:30,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:12:30,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:12:30,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:12:30,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:12:30,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:12:30,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:12:30,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:12:30,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:12:30,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:12:30,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:12:30,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:12:30,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:12:30,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:12:30,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:12:30,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:12:30,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:12:30,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:12:30,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:12:30,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:12:30,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:12:30,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:12:30,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:12:30,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:12:30,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:12:30,055 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 [2020-10-27 05:12:30,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:12:30,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:12:30,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:12:30,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:12:30,114 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:12:30,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:12:30,115 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:12:30,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:12:30,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:12:30,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:12:30,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:12:30,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:12:30,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:12:30,116 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:12:30,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:12:30,117 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:12:30,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:12:30,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:12:30,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:12:30,117 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:12:30,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:12:30,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:12:30,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:12:30,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:12:30,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:12:30,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:12:30,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:12:30,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:12:30,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:12:30,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:12:30,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:12:30,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:12:30,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:12:30,527 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:12:30,527 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:12:30,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:12:30,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7dcb1cb45/c3260a02f6974dce88ceb7eb7d5825dd/FLAGb425c2ced [2020-10-27 05:12:31,244 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:12:31,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:12:31,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7dcb1cb45/c3260a02f6974dce88ceb7eb7d5825dd/FLAGb425c2ced [2020-10-27 05:12:31,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7dcb1cb45/c3260a02f6974dce88ceb7eb7d5825dd [2020-10-27 05:12:31,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:12:31,601 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:12:31,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:12:31,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:12:31,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:12:31,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:12:31" (1/1) ... [2020-10-27 05:12:31,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66de8fb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:31, skipping insertion in model container [2020-10-27 05:12:31,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:12:31" (1/1) ... [2020-10-27 05:12:31,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:12:31,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:12:32,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:12:32,015 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:12:32,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:12:32,157 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:12:32,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:32 WrapperNode [2020-10-27 05:12:32,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:12:32,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:12:32,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:12:32,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:12:32,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:32" (1/1) ... [2020-10-27 05:12:32,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:32" (1/1) ... [2020-10-27 05:12:32,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:32" (1/1) ... [2020-10-27 05:12:32,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:32" (1/1) ... [2020-10-27 05:12:32,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:32" (1/1) ... [2020-10-27 05:12:32,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:32" (1/1) ... [2020-10-27 05:12:32,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:32" (1/1) ... [2020-10-27 05:12:32,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:12:32,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:12:32,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:12:32,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:12:32,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:32" (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 [2020-10-27 05:12:32,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:12:32,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:12:32,311 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:12:32,311 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:12:32,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:12:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:12:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:12:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:12:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:12:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:12:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:12:32,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:12:32,313 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:12:32,313 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:12:32,313 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:12:32,313 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:12:32,313 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:12:32,313 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:12:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:12:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:12:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:12:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:12:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:12:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:12:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:12:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:12:32,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:12:32,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:12:33,101 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:12:33,102 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:12:33,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:12:33 BoogieIcfgContainer [2020-10-27 05:12:33,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:12:33,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:12:33,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:12:33,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:12:33,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:12:31" (1/3) ... [2020-10-27 05:12:33,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e86c0f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:12:33, skipping insertion in model container [2020-10-27 05:12:33,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:32" (2/3) ... [2020-10-27 05:12:33,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e86c0f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:12:33, skipping insertion in model container [2020-10-27 05:12:33,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:12:33" (3/3) ... [2020-10-27 05:12:33,118 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:12:33,130 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:12:33,135 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:12:33,150 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:12:33,190 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:12:33,190 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:12:33,190 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:12:33,190 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:12:33,190 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:12:33,191 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:12:33,191 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:12:33,191 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:12:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-27 05:12:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:12:33,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:33,231 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] [2020-10-27 05:12:33,232 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:33,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1104418387, now seen corresponding path program 1 times [2020-10-27 05:12:33,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:33,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203739149] [2020-10-27 05:12:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:33,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:37,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:38,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:38,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:12:38,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:12:38,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:12:38,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:38,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:12:38,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 05:12:38,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:12:38,983 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:38,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:39,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:39,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:39,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:39,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:39,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:12:39,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:39,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:39,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:39,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:39,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:39,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203739149] [2020-10-27 05:12:39,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:39,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:12:39,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755971293] [2020-10-27 05:12:39,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:12:39,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:39,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:12:39,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:12:39,102 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 6 states. [2020-10-27 05:12:39,373 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:12:40,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:40,146 INFO L93 Difference]: Finished difference Result 204 states and 330 transitions. [2020-10-27 05:12:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:12:40,148 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-27 05:12:40,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:40,159 INFO L225 Difference]: With dead ends: 204 [2020-10-27 05:12:40,160 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 05:12:40,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 05:12:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-27 05:12:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 05:12:40,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2020-10-27 05:12:40,222 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 52 [2020-10-27 05:12:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:40,223 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2020-10-27 05:12:40,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:12:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2020-10-27 05:12:40,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:12:40,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:40,226 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] [2020-10-27 05:12:40,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:12:40,226 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:40,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:40,227 INFO L82 PathProgramCache]: Analyzing trace with hash 683705539, now seen corresponding path program 1 times [2020-10-27 05:12:40,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:40,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414494100] [2020-10-27 05:12:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:40,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:45,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:12:45,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:12:45,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:12:45,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:45,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:45,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:45,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:12:45,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:45,688 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:45,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:45,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:45,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:45,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:45,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:12:45,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:45,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:45,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:45,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:45,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:45,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414494100] [2020-10-27 05:12:45,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:45,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:45,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144464629] [2020-10-27 05:12:45,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:45,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:45,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:45,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:45,774 INFO L87 Difference]: Start difference. First operand 107 states and 143 transitions. Second operand 11 states. [2020-10-27 05:12:46,011 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:12:46,841 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:12:47,053 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:12:47,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:47,369 INFO L93 Difference]: Finished difference Result 218 states and 307 transitions. [2020-10-27 05:12:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:12:47,370 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-27 05:12:47,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:47,372 INFO L225 Difference]: With dead ends: 218 [2020-10-27 05:12:47,373 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 05:12:47,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:12:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 05:12:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 107. [2020-10-27 05:12:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 05:12:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 142 transitions. [2020-10-27 05:12:47,392 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 142 transitions. Word has length 53 [2020-10-27 05:12:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:47,393 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 142 transitions. [2020-10-27 05:12:47,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:12:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 142 transitions. [2020-10-27 05:12:47,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:12:47,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:47,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:47,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:12:47,395 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:47,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:47,396 INFO L82 PathProgramCache]: Analyzing trace with hash 640645067, now seen corresponding path program 1 times [2020-10-27 05:12:47,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:47,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936691668] [2020-10-27 05:12:47,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:47,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:51,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:51,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:12:51,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:12:51,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4560 [2020-10-27 05:12:51,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:51,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:12:51,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:51,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:12:51,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:12:52,242 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:52,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:52,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:52,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:52,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:52,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:52,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:12:52,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:52,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:52,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:52,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:52,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:52,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936691668] [2020-10-27 05:12:52,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:52,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:12:52,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55290866] [2020-10-27 05:12:52,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:12:52,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:52,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:12:52,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:12:52,293 INFO L87 Difference]: Start difference. First operand 107 states and 142 transitions. Second operand 6 states. [2020-10-27 05:12:52,506 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:12:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:52,898 INFO L93 Difference]: Finished difference Result 180 states and 248 transitions. [2020-10-27 05:12:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:12:52,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 05:12:52,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:52,900 INFO L225 Difference]: With dead ends: 180 [2020-10-27 05:12:52,900 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 05:12:52,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 05:12:52,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-27 05:12:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 05:12:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2020-10-27 05:12:52,916 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 54 [2020-10-27 05:12:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:52,917 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2020-10-27 05:12:52,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:12:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2020-10-27 05:12:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:12:52,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:52,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:52,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:12:52,919 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:52,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1072594004, now seen corresponding path program 1 times [2020-10-27 05:12:52,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:52,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401246014] [2020-10-27 05:12:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:52,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:55,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:55,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:57,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:57,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:12:57,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:12:57,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 05:12:57,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:57,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:12:57,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:57,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:12:57,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:58,367 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:12:58,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:58,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:58,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:58,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:58,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:12:58,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:58,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:58,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:58,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:58,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:12:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:58,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401246014] [2020-10-27 05:12:58,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:58,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:12:58,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630467366] [2020-10-27 05:12:58,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:12:58,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:58,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:12:58,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:12:58,452 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand 12 states. [2020-10-27 05:12:58,699 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:12:59,458 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 05:12:59,684 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 05:13:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:00,435 INFO L93 Difference]: Finished difference Result 265 states and 373 transitions. [2020-10-27 05:13:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:13:00,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-27 05:13:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:00,440 INFO L225 Difference]: With dead ends: 265 [2020-10-27 05:13:00,440 INFO L226 Difference]: Without dead ends: 213 [2020-10-27 05:13:00,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:13:00,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-27 05:13:00,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 116. [2020-10-27 05:13:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 05:13:00,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 152 transitions. [2020-10-27 05:13:00,463 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 152 transitions. Word has length 55 [2020-10-27 05:13:00,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:00,463 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 152 transitions. [2020-10-27 05:13:00,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:13:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 152 transitions. [2020-10-27 05:13:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:13:00,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:00,465 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] [2020-10-27 05:13:00,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:13:00,466 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:00,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:00,466 INFO L82 PathProgramCache]: Analyzing trace with hash 879969474, now seen corresponding path program 1 times [2020-10-27 05:13:00,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:00,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24360828] [2020-10-27 05:13:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:00,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:00,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:00,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:00,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:01,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:13:01,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:13:01,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1090 [2020-10-27 05:13:01,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:01,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:01,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:01,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 05:13:01,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:01,776 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:01,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:01,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:01,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:01,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:01,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:13:01,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:01,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:01,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:01,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:01,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:01,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24360828] [2020-10-27 05:13:01,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:01,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:13:01,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838711439] [2020-10-27 05:13:01,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:01,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:01,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:01,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:01,831 INFO L87 Difference]: Start difference. First operand 116 states and 152 transitions. Second operand 6 states. [2020-10-27 05:13:02,041 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:02,422 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:13:02,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:02,804 INFO L93 Difference]: Finished difference Result 267 states and 366 transitions. [2020-10-27 05:13:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:13:02,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:13:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:02,810 INFO L225 Difference]: With dead ends: 267 [2020-10-27 05:13:02,810 INFO L226 Difference]: Without dead ends: 177 [2020-10-27 05:13:02,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:02,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-27 05:13:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2020-10-27 05:13:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-27 05:13:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 235 transitions. [2020-10-27 05:13:02,851 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 235 transitions. Word has length 56 [2020-10-27 05:13:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:02,851 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 235 transitions. [2020-10-27 05:13:02,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 235 transitions. [2020-10-27 05:13:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:13:02,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:02,854 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] [2020-10-27 05:13:02,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:13:02,854 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:02,855 INFO L82 PathProgramCache]: Analyzing trace with hash -621512191, now seen corresponding path program 1 times [2020-10-27 05:13:02,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:02,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437967245] [2020-10-27 05:13:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:02,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:02,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:02,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:06,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:06,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:13:06,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:13:06,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3382 [2020-10-27 05:13:06,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:06,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:13:06,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:06,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:13:06,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:06,683 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:06,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:06,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:06,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:06,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:06,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:06,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:13:06,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:06,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:06,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:06,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:06,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:06,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437967245] [2020-10-27 05:13:06,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:06,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:13:06,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372182154] [2020-10-27 05:13:06,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:13:06,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:06,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:13:06,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:13:06,740 INFO L87 Difference]: Start difference. First operand 172 states and 235 transitions. Second operand 12 states. [2020-10-27 05:13:06,985 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:13:08,132 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:13:08,339 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 05:13:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:10,193 INFO L93 Difference]: Finished difference Result 576 states and 824 transitions. [2020-10-27 05:13:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 05:13:10,194 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-27 05:13:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:10,197 INFO L225 Difference]: With dead ends: 576 [2020-10-27 05:13:10,197 INFO L226 Difference]: Without dead ends: 468 [2020-10-27 05:13:10,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 05:13:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-27 05:13:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 175. [2020-10-27 05:13:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 05:13:10,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 237 transitions. [2020-10-27 05:13:10,228 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 237 transitions. Word has length 57 [2020-10-27 05:13:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:10,229 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 237 transitions. [2020-10-27 05:13:10,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:13:10,229 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 237 transitions. [2020-10-27 05:13:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:13:10,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:10,231 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] [2020-10-27 05:13:10,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:13:10,232 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:10,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1109168892, now seen corresponding path program 1 times [2020-10-27 05:13:10,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:10,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646657100] [2020-10-27 05:13:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:10,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:10,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:10,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:10,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:10,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:10,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:15,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:15,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:13:15,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:13:15,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:13:15,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:15,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:13:15,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:15,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:13:15,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:15,650 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:15,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:15,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:15,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:15,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:15,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:15,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:13:15,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:15,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:15,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:15,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:15,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:13:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:15,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646657100] [2020-10-27 05:13:15,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:15,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:13:15,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251814632] [2020-10-27 05:13:15,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:13:15,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:15,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:13:15,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:15,714 INFO L87 Difference]: Start difference. First operand 175 states and 237 transitions. Second operand 10 states. [2020-10-27 05:13:15,963 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:13:16,636 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:13:16,855 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:17,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:17,353 INFO L93 Difference]: Finished difference Result 366 states and 521 transitions. [2020-10-27 05:13:17,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:13:17,353 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-27 05:13:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:17,356 INFO L225 Difference]: With dead ends: 366 [2020-10-27 05:13:17,356 INFO L226 Difference]: Without dead ends: 264 [2020-10-27 05:13:17,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2020-10-27 05:13:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-27 05:13:17,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 166. [2020-10-27 05:13:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 05:13:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 224 transitions. [2020-10-27 05:13:17,398 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 224 transitions. Word has length 57 [2020-10-27 05:13:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:17,398 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 224 transitions. [2020-10-27 05:13:17,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:13:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 224 transitions. [2020-10-27 05:13:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:13:17,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:17,400 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] [2020-10-27 05:13:17,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:13:17,400 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:17,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1123215619, now seen corresponding path program 1 times [2020-10-27 05:13:17,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:17,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809647244] [2020-10-27 05:13:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:17,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:19,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:19,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:13:19,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:13:19,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2347 [2020-10-27 05:13:19,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:19,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 05:13:19,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:19,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:13:19,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:20,685 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:20,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:20,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:20,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:20,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:20,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:13:20,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:20,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:20,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:20,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:20,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:20,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809647244] [2020-10-27 05:13:20,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:20,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-27 05:13:20,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930040557] [2020-10-27 05:13:20,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 05:13:20,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:20,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 05:13:20,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:13:20,738 INFO L87 Difference]: Start difference. First operand 166 states and 224 transitions. Second operand 18 states. [2020-10-27 05:13:21,160 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:13:21,776 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-27 05:13:22,028 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2020-10-27 05:13:23,177 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:13:23,430 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 05:13:23,647 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:13:23,878 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:13:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:25,605 INFO L93 Difference]: Finished difference Result 859 states and 1260 transitions. [2020-10-27 05:13:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:13:25,606 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-10-27 05:13:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:25,611 INFO L225 Difference]: With dead ends: 859 [2020-10-27 05:13:25,611 INFO L226 Difference]: Without dead ends: 767 [2020-10-27 05:13:25,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 05:13:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-10-27 05:13:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 171. [2020-10-27 05:13:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-27 05:13:25,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 229 transitions. [2020-10-27 05:13:25,654 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 229 transitions. Word has length 58 [2020-10-27 05:13:25,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:25,654 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 229 transitions. [2020-10-27 05:13:25,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 05:13:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 229 transitions. [2020-10-27 05:13:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:13:25,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:25,656 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] [2020-10-27 05:13:25,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:13:25,656 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:25,657 INFO L82 PathProgramCache]: Analyzing trace with hash -259687014, now seen corresponding path program 1 times [2020-10-27 05:13:25,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:25,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115597439] [2020-10-27 05:13:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:25,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:26,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:28,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:28,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:13:28,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:13:28,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2667 [2020-10-27 05:13:28,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:28,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:13:28,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:28,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:13:28,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:28,588 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2020-10-27 05:13:28,905 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:28,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:28,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:28,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:28,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:28,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:28,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:13:28,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:28,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:28,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:28,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:28,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:28,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115597439] [2020-10-27 05:13:28,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:28,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:13:28,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212657048] [2020-10-27 05:13:28,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:13:28,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:28,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:13:28,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:13:28,958 INFO L87 Difference]: Start difference. First operand 171 states and 229 transitions. Second operand 15 states. [2020-10-27 05:13:29,613 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 145 [2020-10-27 05:13:30,164 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-10-27 05:13:31,281 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:13:31,525 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:31,793 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:13:32,039 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-27 05:13:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:33,363 INFO L93 Difference]: Finished difference Result 460 states and 655 transitions. [2020-10-27 05:13:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 05:13:33,364 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-10-27 05:13:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:33,366 INFO L225 Difference]: With dead ends: 460 [2020-10-27 05:13:33,366 INFO L226 Difference]: Without dead ends: 363 [2020-10-27 05:13:33,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=348, Invalid=1374, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 05:13:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-27 05:13:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 168. [2020-10-27 05:13:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 05:13:33,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 225 transitions. [2020-10-27 05:13:33,401 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 225 transitions. Word has length 58 [2020-10-27 05:13:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:33,401 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 225 transitions. [2020-10-27 05:13:33,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:13:33,402 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 225 transitions. [2020-10-27 05:13:33,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:13:33,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:33,403 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] [2020-10-27 05:13:33,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:13:33,403 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:33,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:33,404 INFO L82 PathProgramCache]: Analyzing trace with hash -558687800, now seen corresponding path program 1 times [2020-10-27 05:13:33,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:33,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29729868] [2020-10-27 05:13:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:33,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:33,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:13:33,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:13:33,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-27 05:13:33,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:33,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:33,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:13:33,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:13:33,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:33,946 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:33,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:33,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:33,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:33,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:33,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:13:33,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:33,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:33,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:33,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:33,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:33,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29729868] [2020-10-27 05:13:33,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:33,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:13:33,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252869465] [2020-10-27 05:13:33,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:33,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:33,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:33,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:33,976 INFO L87 Difference]: Start difference. First operand 168 states and 225 transitions. Second operand 6 states. [2020-10-27 05:13:34,186 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:13:34,644 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 05:13:34,833 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:13:35,798 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:13:35,975 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:13:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:35,985 INFO L93 Difference]: Finished difference Result 724 states and 1055 transitions. [2020-10-27 05:13:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:13:35,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-27 05:13:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:35,989 INFO L225 Difference]: With dead ends: 724 [2020-10-27 05:13:35,989 INFO L226 Difference]: Without dead ends: 640 [2020-10-27 05:13:35,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:13:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-10-27 05:13:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 268. [2020-10-27 05:13:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-27 05:13:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 369 transitions. [2020-10-27 05:13:36,050 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 369 transitions. Word has length 59 [2020-10-27 05:13:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:36,050 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 369 transitions. [2020-10-27 05:13:36,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 369 transitions. [2020-10-27 05:13:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:13:36,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:36,051 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] [2020-10-27 05:13:36,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:13:36,052 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:36,052 INFO L82 PathProgramCache]: Analyzing trace with hash 734757896, now seen corresponding path program 1 times [2020-10-27 05:13:36,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:36,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794940766] [2020-10-27 05:13:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:36,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:37,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:40,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:40,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:13:40,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:13:40,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4035 [2020-10-27 05:13:40,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:40,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 05:13:40,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:40,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:13:40,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:40,457 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-27 05:13:40,733 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2020-10-27 05:13:41,123 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:41,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:41,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:41,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:41,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:41,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:41,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:13:41,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:41,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:41,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794940766] [2020-10-27 05:13:41,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:41,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-27 05:13:41,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916228589] [2020-10-27 05:13:41,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 05:13:41,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:41,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 05:13:41,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:13:41,162 INFO L87 Difference]: Start difference. First operand 268 states and 369 transitions. Second operand 18 states. [2020-10-27 05:13:41,387 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-27 05:13:42,064 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 188 [2020-10-27 05:13:42,595 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-27 05:13:42,838 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-27 05:13:43,202 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 83 [2020-10-27 05:13:44,372 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:13:44,602 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:13:44,842 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:13:45,160 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:47,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:47,037 INFO L93 Difference]: Finished difference Result 1483 states and 2180 transitions. [2020-10-27 05:13:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:13:47,038 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-10-27 05:13:47,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:47,045 INFO L225 Difference]: With dead ends: 1483 [2020-10-27 05:13:47,045 INFO L226 Difference]: Without dead ends: 1310 [2020-10-27 05:13:47,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 05:13:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2020-10-27 05:13:47,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 273. [2020-10-27 05:13:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-27 05:13:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 374 transitions. [2020-10-27 05:13:47,116 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 374 transitions. Word has length 59 [2020-10-27 05:13:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:47,117 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 374 transitions. [2020-10-27 05:13:47,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 05:13:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 374 transitions. [2020-10-27 05:13:47,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:13:47,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:47,118 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] [2020-10-27 05:13:47,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:13:47,118 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:47,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:47,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1145372728, now seen corresponding path program 1 times [2020-10-27 05:13:47,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:47,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757731995] [2020-10-27 05:13:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:47,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:47,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:47,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:47,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:13:47,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:13:47,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 05:13:47,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:13:47,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:13:47,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:47,557 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:47,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:47,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:47,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:47,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:47,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:47,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:13:47,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:47,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:47,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:47,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:47,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:47,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757731995] [2020-10-27 05:13:47,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:47,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:13:47,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5107561] [2020-10-27 05:13:47,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:47,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:47,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:47,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:47,587 INFO L87 Difference]: Start difference. First operand 273 states and 374 transitions. Second operand 6 states. [2020-10-27 05:13:47,826 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:13:48,313 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:13:48,503 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:13:49,359 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:13:49,529 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:13:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:49,543 INFO L93 Difference]: Finished difference Result 810 states and 1167 transitions. [2020-10-27 05:13:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:13:49,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-27 05:13:49,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:49,547 INFO L225 Difference]: With dead ends: 810 [2020-10-27 05:13:49,547 INFO L226 Difference]: Without dead ends: 643 [2020-10-27 05:13:49,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:13:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2020-10-27 05:13:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 277. [2020-10-27 05:13:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-27 05:13:49,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 376 transitions. [2020-10-27 05:13:49,613 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 376 transitions. Word has length 60 [2020-10-27 05:13:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:49,613 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 376 transitions. [2020-10-27 05:13:49,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 376 transitions. [2020-10-27 05:13:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:13:49,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:49,614 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] [2020-10-27 05:13:49,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:13:49,615 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:49,615 INFO L82 PathProgramCache]: Analyzing trace with hash 745342820, now seen corresponding path program 1 times [2020-10-27 05:13:49,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:49,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800458237] [2020-10-27 05:13:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:49,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:52,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:13:52,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:13:52,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2517 [2020-10-27 05:13:52,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:52,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:13:52,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:52,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:13:52,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:52,344 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2020-10-27 05:13:52,547 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:52,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:52,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:52,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:52,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:52,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:13:52,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:52,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:52,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:52,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:52,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:52,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800458237] [2020-10-27 05:13:52,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:52,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:13:52,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396217020] [2020-10-27 05:13:52,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:13:52,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:13:52,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:52,571 INFO L87 Difference]: Start difference. First operand 277 states and 376 transitions. Second operand 10 states. [2020-10-27 05:13:52,783 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:13:53,678 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 05:13:53,884 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:54,450 INFO L93 Difference]: Finished difference Result 548 states and 774 transitions. [2020-10-27 05:13:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:13:54,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 05:13:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:54,453 INFO L225 Difference]: With dead ends: 548 [2020-10-27 05:13:54,453 INFO L226 Difference]: Without dead ends: 359 [2020-10-27 05:13:54,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:13:54,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-27 05:13:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 272. [2020-10-27 05:13:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-27 05:13:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 368 transitions. [2020-10-27 05:13:54,525 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 368 transitions. Word has length 60 [2020-10-27 05:13:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:54,526 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 368 transitions. [2020-10-27 05:13:54,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:13:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 368 transitions. [2020-10-27 05:13:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:13:54,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:54,527 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] [2020-10-27 05:13:54,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:13:54,527 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:54,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash -771499104, now seen corresponding path program 1 times [2020-10-27 05:13:54,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:54,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537766044] [2020-10-27 05:13:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:54,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:54,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:54,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:55,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:55,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:13:55,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:13:55,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-27 05:13:55,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:55,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:13:55,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:55,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:13:55,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:56,349 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:56,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:56,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:56,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:56,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:56,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:13:56,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:56,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:56,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:56,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:56,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537766044] [2020-10-27 05:13:56,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:56,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:13:56,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715982826] [2020-10-27 05:13:56,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:13:56,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:13:56,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:56,384 INFO L87 Difference]: Start difference. First operand 272 states and 368 transitions. Second operand 10 states. [2020-10-27 05:13:56,610 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:13:57,399 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:57,610 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:13:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:58,196 INFO L93 Difference]: Finished difference Result 635 states and 899 transitions. [2020-10-27 05:13:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:13:58,196 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 05:13:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:58,199 INFO L225 Difference]: With dead ends: 635 [2020-10-27 05:13:58,199 INFO L226 Difference]: Without dead ends: 456 [2020-10-27 05:13:58,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:13:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-27 05:13:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 266. [2020-10-27 05:13:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-27 05:13:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 357 transitions. [2020-10-27 05:13:58,279 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 357 transitions. Word has length 60 [2020-10-27 05:13:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:58,279 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 357 transitions. [2020-10-27 05:13:58,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:13:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 357 transitions. [2020-10-27 05:13:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:13:58,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:58,281 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] [2020-10-27 05:13:58,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:13:58,281 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:58,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:58,281 INFO L82 PathProgramCache]: Analyzing trace with hash 284024675, now seen corresponding path program 1 times [2020-10-27 05:13:58,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:58,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646179185] [2020-10-27 05:13:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:58,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:58,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:58,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:59,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:59,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:13:59,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:13:59,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-27 05:13:59,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:13:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:13:59,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:59,814 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:13:59,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:59,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:59,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:59,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:59,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:59,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:13:59,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:59,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:59,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:59,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:59,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646179185] [2020-10-27 05:13:59,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:59,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:13:59,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908885998] [2020-10-27 05:13:59,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:13:59,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:59,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:13:59,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:59,852 INFO L87 Difference]: Start difference. First operand 266 states and 357 transitions. Second operand 9 states. [2020-10-27 05:14:00,108 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:14:01,212 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:14:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:01,238 INFO L93 Difference]: Finished difference Result 610 states and 863 transitions. [2020-10-27 05:14:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:14:01,239 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-27 05:14:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:01,241 INFO L225 Difference]: With dead ends: 610 [2020-10-27 05:14:01,241 INFO L226 Difference]: Without dead ends: 423 [2020-10-27 05:14:01,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:14:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-27 05:14:01,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 246. [2020-10-27 05:14:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-27 05:14:01,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 332 transitions. [2020-10-27 05:14:01,328 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 332 transitions. Word has length 60 [2020-10-27 05:14:01,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:01,328 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 332 transitions. [2020-10-27 05:14:01,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:14:01,328 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 332 transitions. [2020-10-27 05:14:01,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:14:01,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:01,329 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] [2020-10-27 05:14:01,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:14:01,330 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:01,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:01,330 INFO L82 PathProgramCache]: Analyzing trace with hash 901500745, now seen corresponding path program 1 times [2020-10-27 05:14:01,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:01,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754262965] [2020-10-27 05:14:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:01,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:01,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:01,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:01,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:01,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:01,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:01,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:02,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:02,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:02,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:02,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:02,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:06,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:14:06,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:14:06,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:14:06,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:06,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:14:06,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:06,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:14:06,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:06,554 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:14:06,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:06,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:06,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:06,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:06,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:14:06,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:06,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:06,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:06,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:06,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:06,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754262965] [2020-10-27 05:14:06,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:06,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:14:06,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114133967] [2020-10-27 05:14:06,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:14:06,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:06,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:14:06,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:14:06,615 INFO L87 Difference]: Start difference. First operand 246 states and 332 transitions. Second operand 6 states. [2020-10-27 05:14:06,824 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:14:07,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:07,249 INFO L93 Difference]: Finished difference Result 407 states and 574 transitions. [2020-10-27 05:14:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:14:07,249 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-27 05:14:07,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:07,250 INFO L225 Difference]: With dead ends: 407 [2020-10-27 05:14:07,250 INFO L226 Difference]: Without dead ends: 242 [2020-10-27 05:14:07,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:14:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-27 05:14:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 154. [2020-10-27 05:14:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-27 05:14:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 198 transitions. [2020-10-27 05:14:07,308 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 198 transitions. Word has length 81 [2020-10-27 05:14:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:07,309 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 198 transitions. [2020-10-27 05:14:07,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:14:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 198 transitions. [2020-10-27 05:14:07,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:14:07,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:07,310 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] [2020-10-27 05:14:07,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:14:07,310 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:07,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:07,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1875463854, now seen corresponding path program 1 times [2020-10-27 05:14:07,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:07,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275032424] [2020-10-27 05:14:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:07,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:07,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:07,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:07,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:07,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:07,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:07,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:08,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:08,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:08,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:08,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:12,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:14:12,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:14:12,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:14:12,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:12,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:14:12,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:12,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:14:12,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:12,652 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:14:12,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:12,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:12,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:12,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:12,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:14:12,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:12,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:12,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:12,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:12,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:12,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275032424] [2020-10-27 05:14:12,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:12,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:14:12,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444773543] [2020-10-27 05:14:12,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:14:12,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:12,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:14:12,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:14:12,699 INFO L87 Difference]: Start difference. First operand 154 states and 198 transitions. Second operand 8 states. [2020-10-27 05:14:12,888 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:14:13,730 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:14:13,946 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:14:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:14,291 INFO L93 Difference]: Finished difference Result 526 states and 744 transitions. [2020-10-27 05:14:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:14:14,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 81 [2020-10-27 05:14:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:14,293 INFO L225 Difference]: With dead ends: 526 [2020-10-27 05:14:14,294 INFO L226 Difference]: Without dead ends: 441 [2020-10-27 05:14:14,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:14:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-27 05:14:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 244. [2020-10-27 05:14:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-27 05:14:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 329 transitions. [2020-10-27 05:14:14,398 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 329 transitions. Word has length 81 [2020-10-27 05:14:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:14,399 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 329 transitions. [2020-10-27 05:14:14,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:14:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 329 transitions. [2020-10-27 05:14:14,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:14:14,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:14,400 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] [2020-10-27 05:14:14,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:14:14,401 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1150149004, now seen corresponding path program 1 times [2020-10-27 05:14:14,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:14,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944101625] [2020-10-27 05:14:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:14,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:15,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:15,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:14:15,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:14:15,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1556 [2020-10-27 05:14:15,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:15,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:14:15,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:14:15,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 05:14:15,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:16,173 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:14:16,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:16,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:16,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:16,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:16,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 05:14:16,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:16,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:16,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944101625] [2020-10-27 05:14:16,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:16,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:14:16,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330346844] [2020-10-27 05:14:16,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:14:16,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:16,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:14:16,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:14:16,203 INFO L87 Difference]: Start difference. First operand 244 states and 329 transitions. Second operand 6 states. [2020-10-27 05:14:16,415 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:14:17,025 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:14:17,347 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 05:14:17,549 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 05:14:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:17,644 INFO L93 Difference]: Finished difference Result 931 states and 1329 transitions. [2020-10-27 05:14:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:14:17,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-27 05:14:17,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:17,648 INFO L225 Difference]: With dead ends: 931 [2020-10-27 05:14:17,648 INFO L226 Difference]: Without dead ends: 756 [2020-10-27 05:14:17,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:14:17,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2020-10-27 05:14:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 494. [2020-10-27 05:14:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-27 05:14:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 693 transitions. [2020-10-27 05:14:17,835 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 693 transitions. Word has length 81 [2020-10-27 05:14:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:17,835 INFO L481 AbstractCegarLoop]: Abstraction has 494 states and 693 transitions. [2020-10-27 05:14:17,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:14:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 693 transitions. [2020-10-27 05:14:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:14:17,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:17,837 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] [2020-10-27 05:14:17,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:14:17,837 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:17,837 INFO L82 PathProgramCache]: Analyzing trace with hash 669269346, now seen corresponding path program 1 times [2020-10-27 05:14:17,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:17,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998131446] [2020-10-27 05:14:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:17,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:17,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:17,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:17,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:18,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:18,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:18,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:18,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:18,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:14:18,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:14:18,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-27 05:14:18,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:18,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:14:18,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:14:18,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:14:18,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:19,029 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:14:19,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:19,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:19,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:19,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:19,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:19,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:14:19,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:19,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:19,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:19,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:19,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:19,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998131446] [2020-10-27 05:14:19,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:19,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:14:19,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201655953] [2020-10-27 05:14:19,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:14:19,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:19,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:14:19,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:14:19,060 INFO L87 Difference]: Start difference. First operand 494 states and 693 transitions. Second operand 5 states. [2020-10-27 05:14:19,290 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:14:19,878 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:14:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:20,077 INFO L93 Difference]: Finished difference Result 1102 states and 1572 transitions. [2020-10-27 05:14:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:14:20,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-27 05:14:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:20,080 INFO L225 Difference]: With dead ends: 1102 [2020-10-27 05:14:20,080 INFO L226 Difference]: Without dead ends: 677 [2020-10-27 05:14:20,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:14:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-10-27 05:14:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 668. [2020-10-27 05:14:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2020-10-27 05:14:20,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 932 transitions. [2020-10-27 05:14:20,336 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 932 transitions. Word has length 81 [2020-10-27 05:14:20,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:20,336 INFO L481 AbstractCegarLoop]: Abstraction has 668 states and 932 transitions. [2020-10-27 05:14:20,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:14:20,337 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 932 transitions. [2020-10-27 05:14:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:14:20,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:20,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:20,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:14:20,338 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:20,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:20,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1306658626, now seen corresponding path program 1 times [2020-10-27 05:14:20,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:20,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127839702] [2020-10-27 05:14:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:20,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:20,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:14:20,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:14:20,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-27 05:14:20,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 05:14:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 05:14:20,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:20,937 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:14:20,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:20,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:20,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:20,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:20,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:14:20,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:20,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:20,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:20,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:20,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:20,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127839702] [2020-10-27 05:14:20,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:20,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:14:20,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912546397] [2020-10-27 05:14:20,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:14:20,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:20,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:14:20,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:14:20,963 INFO L87 Difference]: Start difference. First operand 668 states and 932 transitions. Second operand 4 states. [2020-10-27 05:14:21,169 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:14:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:21,998 INFO L93 Difference]: Finished difference Result 1778 states and 2513 transitions. [2020-10-27 05:14:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:14:21,999 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-27 05:14:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:22,003 INFO L225 Difference]: With dead ends: 1778 [2020-10-27 05:14:22,003 INFO L226 Difference]: Without dead ends: 1187 [2020-10-27 05:14:22,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:14:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2020-10-27 05:14:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 925. [2020-10-27 05:14:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 925 states. [2020-10-27 05:14:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1278 transitions. [2020-10-27 05:14:22,519 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1278 transitions. Word has length 82 [2020-10-27 05:14:22,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:22,520 INFO L481 AbstractCegarLoop]: Abstraction has 925 states and 1278 transitions. [2020-10-27 05:14:22,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:14:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1278 transitions. [2020-10-27 05:14:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:14:22,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:22,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:22,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:14:22,521 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:22,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1856579654, now seen corresponding path program 1 times [2020-10-27 05:14:22,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:22,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015533530] [2020-10-27 05:14:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:22,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:22,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:14:22,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:14:22,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-27 05:14:22,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:22,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:22,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 05:14:22,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 05:14:22,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:23,110 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:14:23,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:23,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:23,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:23,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:23,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:14:23,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:23,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:23,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:23,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:23,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:23,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015533530] [2020-10-27 05:14:23,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:23,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:14:23,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411828545] [2020-10-27 05:14:23,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:14:23,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:23,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:14:23,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:14:23,150 INFO L87 Difference]: Start difference. First operand 925 states and 1278 transitions. Second operand 4 states. [2020-10-27 05:14:23,343 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:14:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:24,365 INFO L93 Difference]: Finished difference Result 2537 states and 3513 transitions. [2020-10-27 05:14:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:14:24,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-27 05:14:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:24,373 INFO L225 Difference]: With dead ends: 2537 [2020-10-27 05:14:24,373 INFO L226 Difference]: Without dead ends: 1681 [2020-10-27 05:14:24,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:14:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2020-10-27 05:14:25,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1578. [2020-10-27 05:14:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-10-27 05:14:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2156 transitions. [2020-10-27 05:14:25,020 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2156 transitions. Word has length 83 [2020-10-27 05:14:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:25,021 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2156 transitions. [2020-10-27 05:14:25,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:14:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2156 transitions. [2020-10-27 05:14:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:14:25,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:25,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:25,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 05:14:25,022 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1652962825, now seen corresponding path program 1 times [2020-10-27 05:14:25,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:25,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292736390] [2020-10-27 05:14:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:25,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:25,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:25,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:14:25,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:25,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-27 05:14:25,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:25,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:14:25,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 05:14:25,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 05:14:25,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:25,410 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:14:25,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:25,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:25,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:25,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:25,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:25,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 05:14:25,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:25,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:25,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:25,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:25,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:25,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292736390] [2020-10-27 05:14:25,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:25,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:14:25,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792552798] [2020-10-27 05:14:25,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:14:25,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:25,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:14:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:14:25,433 INFO L87 Difference]: Start difference. First operand 1578 states and 2156 transitions. Second operand 6 states. [2020-10-27 05:14:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:27,064 INFO L93 Difference]: Finished difference Result 2734 states and 3717 transitions. [2020-10-27 05:14:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:14:27,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-27 05:14:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:27,075 INFO L225 Difference]: With dead ends: 2734 [2020-10-27 05:14:27,075 INFO L226 Difference]: Without dead ends: 2731 [2020-10-27 05:14:27,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2020-10-27 05:14:27,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 1650. [2020-10-27 05:14:27,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1650 states. [2020-10-27 05:14:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2220 transitions. [2020-10-27 05:14:27,910 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2220 transitions. Word has length 84 [2020-10-27 05:14:27,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:27,911 INFO L481 AbstractCegarLoop]: Abstraction has 1650 states and 2220 transitions. [2020-10-27 05:14:27,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:14:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2220 transitions. [2020-10-27 05:14:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:14:27,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:27,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:27,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 05:14:27,912 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:27,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:27,913 INFO L82 PathProgramCache]: Analyzing trace with hash -88797290, now seen corresponding path program 1 times [2020-10-27 05:14:27,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:27,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223070432] [2020-10-27 05:14:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:27,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:27,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:27,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:29,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:32,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:14:32,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:14:32,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:14:32,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:32,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:14:32,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:32,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:14:32,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:33,287 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:14:33,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:33,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:33,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:33,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:33,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:33,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:14:33,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:33,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:33,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223070432] [2020-10-27 05:14:33,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:33,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:14:33,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801511257] [2020-10-27 05:14:33,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:14:33,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:33,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:14:33,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:14:33,329 INFO L87 Difference]: Start difference. First operand 1650 states and 2220 transitions. Second operand 13 states. [2020-10-27 05:14:33,627 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:14:35,850 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:14:36,114 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:14:37,694 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:14:39,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:39,341 INFO L93 Difference]: Finished difference Result 6470 states and 8728 transitions. [2020-10-27 05:14:39,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 05:14:39,342 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2020-10-27 05:14:39,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:39,360 INFO L225 Difference]: With dead ends: 6470 [2020-10-27 05:14:39,360 INFO L226 Difference]: Without dead ends: 5837 [2020-10-27 05:14:39,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=387, Invalid=1419, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 05:14:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5837 states. [2020-10-27 05:14:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5837 to 1668. [2020-10-27 05:14:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1668 states. [2020-10-27 05:14:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2242 transitions. [2020-10-27 05:14:40,076 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2242 transitions. Word has length 84 [2020-10-27 05:14:40,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:40,076 INFO L481 AbstractCegarLoop]: Abstraction has 1668 states and 2242 transitions. [2020-10-27 05:14:40,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:14:40,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2242 transitions. [2020-10-27 05:14:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:14:40,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:40,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:40,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 05:14:40,078 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:40,078 INFO L82 PathProgramCache]: Analyzing trace with hash -762146027, now seen corresponding path program 1 times [2020-10-27 05:14:40,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:40,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467548373] [2020-10-27 05:14:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:40,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:45,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:45,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:14:45,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:14:45,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:14:45,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:45,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:14:45,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:45,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:14:45,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:45,441 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:14:45,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:45,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:45,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:45,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:45,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:45,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:14:45,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:45,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:45,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:45,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:45,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:45,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467548373] [2020-10-27 05:14:45,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:45,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:14:45,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630567785] [2020-10-27 05:14:45,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:14:45,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:45,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:14:45,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:14:45,481 INFO L87 Difference]: Start difference. First operand 1668 states and 2242 transitions. Second operand 12 states. [2020-10-27 05:14:45,782 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:14:47,930 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:14:48,152 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:14:49,764 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:14:51,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:51,743 INFO L93 Difference]: Finished difference Result 6448 states and 8706 transitions. [2020-10-27 05:14:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:14:51,743 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-10-27 05:14:51,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:51,763 INFO L225 Difference]: With dead ends: 6448 [2020-10-27 05:14:51,764 INFO L226 Difference]: Without dead ends: 5815 [2020-10-27 05:14:51,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=327, Invalid=1233, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 05:14:51,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5815 states. [2020-10-27 05:14:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5815 to 1657. [2020-10-27 05:14:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1657 states. [2020-10-27 05:14:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2230 transitions. [2020-10-27 05:14:52,607 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2230 transitions. Word has length 84 [2020-10-27 05:14:52,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:52,608 INFO L481 AbstractCegarLoop]: Abstraction has 1657 states and 2230 transitions. [2020-10-27 05:14:52,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:14:52,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2230 transitions. [2020-10-27 05:14:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:14:52,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:52,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:52,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 05:14:52,609 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:52,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash -372456500, now seen corresponding path program 1 times [2020-10-27 05:14:52,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:52,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142257412] [2020-10-27 05:14:52,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:52,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:53,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:53,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:14:53,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:14:53,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-27 05:14:53,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:53,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:14:53,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:14:53,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 05:14:53,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:53,244 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:14:53,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:53,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:53,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:53,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:53,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:53,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:14:53,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:53,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:53,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142257412] [2020-10-27 05:14:53,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:53,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:14:53,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261480555] [2020-10-27 05:14:53,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:14:53,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:53,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:14:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:14:53,274 INFO L87 Difference]: Start difference. First operand 1657 states and 2230 transitions. Second operand 6 states. [2020-10-27 05:14:53,475 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:14:54,191 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:14:54,442 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:14:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:55,269 INFO L93 Difference]: Finished difference Result 3650 states and 4978 transitions. [2020-10-27 05:14:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:14:55,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-27 05:14:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:55,276 INFO L225 Difference]: With dead ends: 3650 [2020-10-27 05:14:55,276 INFO L226 Difference]: Without dead ends: 2569 [2020-10-27 05:14:55,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2020-10-27 05:14:56,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2533. [2020-10-27 05:14:56,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2533 states. [2020-10-27 05:14:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2533 states to 2533 states and 3375 transitions. [2020-10-27 05:14:56,364 INFO L78 Accepts]: Start accepts. Automaton has 2533 states and 3375 transitions. Word has length 85 [2020-10-27 05:14:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:56,364 INFO L481 AbstractCegarLoop]: Abstraction has 2533 states and 3375 transitions. [2020-10-27 05:14:56,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:14:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2533 states and 3375 transitions. [2020-10-27 05:14:56,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 05:14:56,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:56,366 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:56,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 05:14:56,366 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:56,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1499453307, now seen corresponding path program 1 times [2020-10-27 05:14:56,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:56,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118641674] [2020-10-27 05:14:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:56,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:56,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:56,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:56,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:56,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:56,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:56,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:59,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:59,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:59,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:59,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:01,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:01,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 05:15:01,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:15:01,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:15:01,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:01,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 05:15:01,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:15:01,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 05:15:01,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:01,852 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-27 05:15:04,061 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-27 05:15:06,322 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-27 05:15:06,515 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-27 05:15:06,736 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-27 05:15:06,927 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-27 05:15:07,228 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-27 05:15:07,423 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-27 05:15:10,046 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:15:10,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:10,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:10,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:10,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:10,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:10,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:15:10,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:10,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:15:10,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:10,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:15:10,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:10,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118641674] [2020-10-27 05:15:10,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:15:10,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 05:15:10,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540439951] [2020-10-27 05:15:10,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 05:15:10,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:10,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 05:15:10,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=269, Unknown=1, NotChecked=0, Total=306 [2020-10-27 05:15:10,153 INFO L87 Difference]: Start difference. First operand 2533 states and 3375 transitions. Second operand 18 states. [2020-10-27 05:15:10,871 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 139 [2020-10-27 05:15:12,478 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 256 DAG size of output: 256 [2020-10-27 05:15:13,009 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2020-10-27 05:15:13,309 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-27 05:15:13,865 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2020-10-27 05:15:18,508 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-10-27 05:15:19,003 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-10-27 05:15:25,928 WARN L193 SmtUtils]: Spent 6.80 s on a formula simplification. DAG size of input: 131 DAG size of output: 114 [2020-10-27 05:15:28,754 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2020-10-27 05:15:29,409 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-27 05:15:30,412 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 94 [2020-10-27 05:15:31,455 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2020-10-27 05:15:32,368 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-27 05:15:33,535 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 135 DAG size of output: 106 [2020-10-27 05:15:34,777 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 138 DAG size of output: 109 [2020-10-27 05:15:36,267 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-27 05:15:37,406 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 109 [2020-10-27 05:15:38,259 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-27 05:15:39,368 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 97 [2020-10-27 05:15:40,417 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2020-10-27 05:15:41,827 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 141 DAG size of output: 112 [2020-10-27 05:15:42,787 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2020-10-27 05:15:43,098 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-27 05:15:44,106 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-27 05:15:45,308 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 141 DAG size of output: 112 [2020-10-27 05:15:46,614 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 122 DAG size of output: 113 [2020-10-27 05:15:48,087 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 138 DAG size of output: 109 [2020-10-27 05:15:49,550 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 119 DAG size of output: 110 [2020-10-27 05:15:51,664 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 142 DAG size of output: 133 [2020-10-27 05:15:52,008 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-27 05:15:54,374 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 139 DAG size of output: 130 [2020-10-27 05:15:54,716 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-27 05:15:55,245 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-27 05:15:55,530 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-10-27 05:15:57,660 WARN L193 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2020-10-27 05:15:59,431 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 122 DAG size of output: 113 [2020-10-27 05:16:01,161 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 141 DAG size of output: 112 [2020-10-27 05:16:03,774 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 142 DAG size of output: 133 [2020-10-27 05:16:04,709 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-27 05:16:05,816 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:16:06,478 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:16:07,257 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2020-10-27 05:16:07,735 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:16:08,567 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-27 05:16:09,136 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:16:09,527 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:16:09,873 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:16:10,351 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:16:11,392 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 99 [2020-10-27 05:16:12,555 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2020-10-27 05:16:13,121 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:16:14,291 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 127 DAG size of output: 100 [2020-10-27 05:16:15,578 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 124 DAG size of output: 97