/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:25:51,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:25:51,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:25:51,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:25:51,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:25:51,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:25:51,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:25:51,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:25:51,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:25:51,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:25:51,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:25:51,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:25:51,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:25:51,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:25:51,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:25:51,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:25:51,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:25:51,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:25:51,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:25:51,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:25:51,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:25:51,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:25:51,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:25:51,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:25:51,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:25:51,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:25:51,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:25:51,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:25:51,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:25:51,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:25:51,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:25:51,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:25:51,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:25:51,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:25:51,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:25:51,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:25:51,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:25:51,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:25:51,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:25:51,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:25:51,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:25:51,107 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 [2020-10-29 13:25:51,164 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:25:51,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:25:51,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:25:51,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:25:51,170 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:25:51,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:25:51,170 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:25:51,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:25:51,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:25:51,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:25:51,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:25:51,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:25:51,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:25:51,172 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:25:51,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:25:51,172 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:25:51,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:25:51,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:25:51,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:25:51,173 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:25:51,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:25:51,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:25:51,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:25:51,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:25:51,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:25:51,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:25:51,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:25:51,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:25:51,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:25:51,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:25:51,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:25:51,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:25:51,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:25:51,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:25:51,590 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:25:51,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:25:51,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1bc83c12/983cb0d6c7d4408b9b74dcdb265389f8/FLAGafead5eb6 [2020-10-29 13:25:52,426 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:25:52,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:25:52,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1bc83c12/983cb0d6c7d4408b9b74dcdb265389f8/FLAGafead5eb6 [2020-10-29 13:25:52,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1bc83c12/983cb0d6c7d4408b9b74dcdb265389f8 [2020-10-29 13:25:52,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:25:52,731 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:25:52,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:25:52,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:25:52,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:25:52,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:25:52" (1/1) ... [2020-10-29 13:25:52,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@172adc38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:52, skipping insertion in model container [2020-10-29 13:25:52,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:25:52" (1/1) ... [2020-10-29 13:25:52,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:25:52,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:25:53,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:25:53,149 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:25:53,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:25:53,249 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:25:53,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:53 WrapperNode [2020-10-29 13:25:53,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:25:53,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:25:53,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:25:53,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:25:53,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:53" (1/1) ... [2020-10-29 13:25:53,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:53" (1/1) ... [2020-10-29 13:25:53,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:53" (1/1) ... [2020-10-29 13:25:53,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:53" (1/1) ... [2020-10-29 13:25:53,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:53" (1/1) ... [2020-10-29 13:25:53,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:53" (1/1) ... [2020-10-29 13:25:53,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:53" (1/1) ... [2020-10-29 13:25:53,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:25:53,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:25:53,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:25:53,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:25:53,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:53" (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 [2020-10-29 13:25:53,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:25:53,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:25:53,461 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:25:53,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:25:53,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:25:53,462 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:25:53,463 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:25:53,463 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:25:53,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:25:53,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:25:53,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:25:53,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:25:53,465 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:25:53,465 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:25:53,465 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:25:53,466 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:25:53,466 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:25:53,466 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:25:53,467 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:25:53,467 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:25:53,467 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:25:53,467 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-29 13:25:53,467 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:25:53,468 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:25:53,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:25:53,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:25:53,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:25:53,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:25:53,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:25:53,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:25:53,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:25:54,571 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:25:54,571 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:25:54,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:25:54 BoogieIcfgContainer [2020-10-29 13:25:54,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:25:54,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:25:54,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:25:54,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:25:54,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:25:52" (1/3) ... [2020-10-29 13:25:54,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cda4ce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:25:54, skipping insertion in model container [2020-10-29 13:25:54,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:53" (2/3) ... [2020-10-29 13:25:54,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cda4ce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:25:54, skipping insertion in model container [2020-10-29 13:25:54,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:25:54" (3/3) ... [2020-10-29 13:25:54,583 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:25:54,594 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:25:54,598 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:25:54,611 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:25:54,640 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:25:54,640 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:25:54,640 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:25:54,640 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:25:54,641 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:25:54,641 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:25:54,641 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:25:54,641 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:25:54,662 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states. [2020-10-29 13:25:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:25:54,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:54,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:25:54,674 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:54,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:54,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2080328782, now seen corresponding path program 1 times [2020-10-29 13:25:54,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:54,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084461694] [2020-10-29 13:25:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:55,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:55,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:55,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:56,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:56,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:57,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:00,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:00,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:26:00,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:26:00,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:26:00,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:00,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:00,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:26:00,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:26:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:26:00,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:26:00,641 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:26:00,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:00,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:00,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:00,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:00,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:00,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:26:00,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:00,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:00,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:00,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:00,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:00,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:26:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:00,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084461694] [2020-10-29 13:26:00,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:00,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:26:00,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135445179] [2020-10-29 13:26:00,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:26:00,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:00,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:26:00,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:26:00,777 INFO L87 Difference]: Start difference. First operand 127 states. Second operand 9 states. [2020-10-29 13:26:01,249 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:26:02,827 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:26:03,220 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:26:03,564 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:26:03,883 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:26:04,169 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:26:04,554 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:26:04,932 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:26:05,286 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:26:05,620 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:26:05,941 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:26:06,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:06,103 INFO L93 Difference]: Finished difference Result 1031 states and 1635 transitions. [2020-10-29 13:26:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:26:06,105 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-10-29 13:26:06,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:06,131 INFO L225 Difference]: With dead ends: 1031 [2020-10-29 13:26:06,131 INFO L226 Difference]: Without dead ends: 923 [2020-10-29 13:26:06,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-29 13:26:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2020-10-29 13:26:06,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 190. [2020-10-29 13:26:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-29 13:26:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 273 transitions. [2020-10-29 13:26:06,236 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 273 transitions. Word has length 78 [2020-10-29 13:26:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:06,237 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 273 transitions. [2020-10-29 13:26:06,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:26:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 273 transitions. [2020-10-29 13:26:06,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:26:06,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:06,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:06,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:26:06,242 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:06,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:06,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1787172879, now seen corresponding path program 1 times [2020-10-29 13:26:06,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:06,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729404395] [2020-10-29 13:26:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:06,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:06,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:06,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:06,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:06,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:07,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:07,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:11,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:11,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:26:11,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:26:11,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 13:26:11,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:11,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:11,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:26:11,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:26:11,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:26:11,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:26:11,913 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:26:11,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:11,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:11,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:11,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:11,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:11,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 13:26:11,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:11,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:11,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:26:11,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:11,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:26:11,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:12,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729404395] [2020-10-29 13:26:12,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:12,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:26:12,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599875997] [2020-10-29 13:26:12,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:26:12,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:12,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:26:12,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:26:12,017 INFO L87 Difference]: Start difference. First operand 190 states and 273 transitions. Second operand 7 states. [2020-10-29 13:26:12,324 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:26:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:13,132 INFO L93 Difference]: Finished difference Result 567 states and 868 transitions. [2020-10-29 13:26:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:26:13,135 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:26:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:13,139 INFO L225 Difference]: With dead ends: 567 [2020-10-29 13:26:13,139 INFO L226 Difference]: Without dead ends: 424 [2020-10-29 13:26:13,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:26:13,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-29 13:26:13,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 229. [2020-10-29 13:26:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-29 13:26:13,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 333 transitions. [2020-10-29 13:26:13,177 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 333 transitions. Word has length 80 [2020-10-29 13:26:13,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:13,178 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 333 transitions. [2020-10-29 13:26:13,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:26:13,178 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 333 transitions. [2020-10-29 13:26:13,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:26:13,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:13,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:13,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:26:13,181 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:13,181 INFO L82 PathProgramCache]: Analyzing trace with hash 340226173, now seen corresponding path program 1 times [2020-10-29 13:26:13,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:13,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429772684] [2020-10-29 13:26:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:13,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:13,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:13,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:13,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:13,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:13,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:13,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:16,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:18,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:18,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:26:18,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:26:18,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:26:18,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:18,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:18,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:26:18,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:26:18,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 13:26:18,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:26:18,619 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:26:18,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:18,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:18,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:18,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:18,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:18,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:26:18,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:18,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:18,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:26:18,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:18,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:26:18,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:18,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429772684] [2020-10-29 13:26:18,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:18,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:26:18,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522555777] [2020-10-29 13:26:18,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:26:18,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:18,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:26:18,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:26:18,709 INFO L87 Difference]: Start difference. First operand 229 states and 333 transitions. Second operand 7 states. [2020-10-29 13:26:19,036 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:26:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:20,001 INFO L93 Difference]: Finished difference Result 563 states and 858 transitions. [2020-10-29 13:26:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:26:20,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:26:20,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:20,006 INFO L225 Difference]: With dead ends: 563 [2020-10-29 13:26:20,006 INFO L226 Difference]: Without dead ends: 420 [2020-10-29 13:26:20,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:26:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-10-29 13:26:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 285. [2020-10-29 13:26:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-29 13:26:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 419 transitions. [2020-10-29 13:26:20,042 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 419 transitions. Word has length 80 [2020-10-29 13:26:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:20,043 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 419 transitions. [2020-10-29 13:26:20,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:26:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 419 transitions. [2020-10-29 13:26:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:26:20,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:20,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:20,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:26:20,046 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:20,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:20,046 INFO L82 PathProgramCache]: Analyzing trace with hash 110313555, now seen corresponding path program 1 times [2020-10-29 13:26:20,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:20,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228813457] [2020-10-29 13:26:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:20,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:20,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:20,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:20,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:20,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:21,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:21,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:21,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:24,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:24,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:26:24,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:26:24,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4607 [2020-10-29 13:26:24,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:24,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:24,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:26:24,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:26:24,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:26:24,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:25,005 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:26:25,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:25,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:25,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:25,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:25,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:25,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:26:25,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:25,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:25,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:25,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:25,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:25,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:25,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228813457] [2020-10-29 13:26:25,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:25,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:26:25,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652830162] [2020-10-29 13:26:25,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:26:25,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:25,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:26:25,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:26:25,060 INFO L87 Difference]: Start difference. First operand 285 states and 419 transitions. Second operand 4 states. [2020-10-29 13:26:25,366 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:26:25,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:25,899 INFO L93 Difference]: Finished difference Result 721 states and 1098 transitions. [2020-10-29 13:26:25,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:26:25,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-29 13:26:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:25,904 INFO L225 Difference]: With dead ends: 721 [2020-10-29 13:26:25,904 INFO L226 Difference]: Without dead ends: 490 [2020-10-29 13:26:25,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:26:25,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-29 13:26:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 485. [2020-10-29 13:26:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-10-29 13:26:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 727 transitions. [2020-10-29 13:26:25,973 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 727 transitions. Word has length 80 [2020-10-29 13:26:25,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:25,976 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 727 transitions. [2020-10-29 13:26:25,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:26:25,976 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 727 transitions. [2020-10-29 13:26:25,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:26:25,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:25,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:25,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:26:25,982 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:25,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:25,982 INFO L82 PathProgramCache]: Analyzing trace with hash 731843188, now seen corresponding path program 1 times [2020-10-29 13:26:25,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:25,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364583986] [2020-10-29 13:26:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:26,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:26,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:26,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:26,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:26,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:27,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:31,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:31,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:26:31,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:26:31,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:26:31,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:31,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:31,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:26:31,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:26:31,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:26:31,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:31,662 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:26:31,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:31,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:31,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:31,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:31,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:31,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:26:31,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:31,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:31,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:31,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:31,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:31,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:26:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:31,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364583986] [2020-10-29 13:26:31,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:31,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:26:31,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88054364] [2020-10-29 13:26:31,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:26:31,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:31,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:26:31,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:26:31,768 INFO L87 Difference]: Start difference. First operand 485 states and 727 transitions. Second operand 9 states. [2020-10-29 13:26:32,231 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:26:33,413 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:26:33,774 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:26:34,087 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:26:34,568 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:26:34,959 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:26:35,312 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:26:35,650 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:26:36,239 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:26:36,647 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:26:37,013 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:26:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:37,064 INFO L93 Difference]: Finished difference Result 2064 states and 3185 transitions. [2020-10-29 13:26:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:26:37,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2020-10-29 13:26:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:37,074 INFO L225 Difference]: With dead ends: 2064 [2020-10-29 13:26:37,074 INFO L226 Difference]: Without dead ends: 1794 [2020-10-29 13:26:37,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-29 13:26:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2020-10-29 13:26:37,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 485. [2020-10-29 13:26:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-10-29 13:26:37,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 725 transitions. [2020-10-29 13:26:37,162 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 725 transitions. Word has length 80 [2020-10-29 13:26:37,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:37,163 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 725 transitions. [2020-10-29 13:26:37,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:26:37,163 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 725 transitions. [2020-10-29 13:26:37,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:26:37,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:37,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:37,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:26:37,165 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:37,166 INFO L82 PathProgramCache]: Analyzing trace with hash -395875709, now seen corresponding path program 1 times [2020-10-29 13:26:37,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:37,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209663416] [2020-10-29 13:26:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:37,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:37,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:37,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:37,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:37,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:37,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:37,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:39,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:42,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:42,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:26:42,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:26:42,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:26:42,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:42,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:42,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:26:42,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:26:42,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 13:26:42,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:42,751 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:26:42,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:42,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:42,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:42,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:42,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:42,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 13:26:42,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:42,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:42,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:26:42,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:42,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:26:42,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:42,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209663416] [2020-10-29 13:26:42,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:42,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:26:42,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667077179] [2020-10-29 13:26:42,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:26:42,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:42,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:26:42,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:26:42,867 INFO L87 Difference]: Start difference. First operand 485 states and 725 transitions. Second operand 7 states. [2020-10-29 13:26:43,206 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:26:44,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:44,174 INFO L93 Difference]: Finished difference Result 1051 states and 1600 transitions. [2020-10-29 13:26:44,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:26:44,175 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:26:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:44,180 INFO L225 Difference]: With dead ends: 1051 [2020-10-29 13:26:44,181 INFO L226 Difference]: Without dead ends: 757 [2020-10-29 13:26:44,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:26:44,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2020-10-29 13:26:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 477. [2020-10-29 13:26:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-29 13:26:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 705 transitions. [2020-10-29 13:26:44,256 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 705 transitions. Word has length 80 [2020-10-29 13:26:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:44,256 INFO L481 AbstractCegarLoop]: Abstraction has 477 states and 705 transitions. [2020-10-29 13:26:44,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:26:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 705 transitions. [2020-10-29 13:26:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:26:44,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:44,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:44,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:26:44,258 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:44,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:44,259 INFO L82 PathProgramCache]: Analyzing trace with hash 940723465, now seen corresponding path program 1 times [2020-10-29 13:26:44,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:44,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123339471] [2020-10-29 13:26:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:44,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:44,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:44,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:44,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:44,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:44,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:44,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:46,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:49,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:49,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:26:49,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:26:49,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:26:49,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:49,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:26:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:26:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:26:49,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:49,828 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:26:49,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:49,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:49,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:49,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:49,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:49,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 13:26:49,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:49,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:49,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:26:49,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:49,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:26:49,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:49,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123339471] [2020-10-29 13:26:49,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:49,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:26:49,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320589978] [2020-10-29 13:26:49,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:26:49,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:49,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:26:49,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:26:49,936 INFO L87 Difference]: Start difference. First operand 477 states and 705 transitions. Second operand 7 states. [2020-10-29 13:26:50,258 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:26:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:51,304 INFO L93 Difference]: Finished difference Result 1115 states and 1688 transitions. [2020-10-29 13:26:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:26:51,305 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:26:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:51,310 INFO L225 Difference]: With dead ends: 1115 [2020-10-29 13:26:51,310 INFO L226 Difference]: Without dead ends: 789 [2020-10-29 13:26:51,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:26:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2020-10-29 13:26:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 469. [2020-10-29 13:26:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-29 13:26:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 685 transitions. [2020-10-29 13:26:51,404 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 685 transitions. Word has length 80 [2020-10-29 13:26:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:51,404 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 685 transitions. [2020-10-29 13:26:51,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:26:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 685 transitions. [2020-10-29 13:26:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:26:51,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:51,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:51,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:26:51,406 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:51,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:51,407 INFO L82 PathProgramCache]: Analyzing trace with hash 987810709, now seen corresponding path program 1 times [2020-10-29 13:26:51,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:51,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532476090] [2020-10-29 13:26:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:51,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:51,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:51,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:51,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:51,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:52,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:52,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:53,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:56,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:56,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:26:56,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:26:56,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:26:56,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:56,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:56,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:26:56,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:26:56,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:26:56,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:56,792 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:26:56,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:56,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:56,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:56,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:56,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:56,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 13:26:56,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:56,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:56,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:26:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:26:56,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:56,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532476090] [2020-10-29 13:26:56,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:56,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:26:56,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726369463] [2020-10-29 13:26:56,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:26:56,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:56,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:26:56,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:26:56,871 INFO L87 Difference]: Start difference. First operand 469 states and 685 transitions. Second operand 7 states. [2020-10-29 13:26:57,204 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:26:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:58,095 INFO L93 Difference]: Finished difference Result 1077 states and 1631 transitions. [2020-10-29 13:26:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:26:58,096 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:26:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:58,100 INFO L225 Difference]: With dead ends: 1077 [2020-10-29 13:26:58,100 INFO L226 Difference]: Without dead ends: 751 [2020-10-29 13:26:58,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:26:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2020-10-29 13:26:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 441. [2020-10-29 13:26:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-29 13:26:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 644 transitions. [2020-10-29 13:26:58,176 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 644 transitions. Word has length 80 [2020-10-29 13:26:58,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:58,176 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 644 transitions. [2020-10-29 13:26:58,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:26:58,177 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 644 transitions. [2020-10-29 13:26:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:26:58,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:58,178 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] [2020-10-29 13:26:58,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:26:58,178 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:58,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:58,179 INFO L82 PathProgramCache]: Analyzing trace with hash 184497353, now seen corresponding path program 1 times [2020-10-29 13:26:58,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:58,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103934071] [2020-10-29 13:26:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:58,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:58,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:58,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:58,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:58,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:58,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:59,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:59,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:03,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:03,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:27:03,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:27:03,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:27:03,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:03,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:03,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:03,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:27:03,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:27:03,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:03,503 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:27:03,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:03,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:03,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:03,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:03,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:03,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:27:03,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:03,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:03,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:03,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:03,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:03,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:03,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103934071] [2020-10-29 13:27:03,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:03,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:27:03,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563707144] [2020-10-29 13:27:03,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:27:03,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:03,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:27:03,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:27:03,540 INFO L87 Difference]: Start difference. First operand 441 states and 644 transitions. Second operand 4 states. [2020-10-29 13:27:03,866 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:27:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:04,664 INFO L93 Difference]: Finished difference Result 707 states and 1062 transitions. [2020-10-29 13:27:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:27:04,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-29 13:27:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:04,668 INFO L225 Difference]: With dead ends: 707 [2020-10-29 13:27:04,669 INFO L226 Difference]: Without dead ends: 483 [2020-10-29 13:27:04,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:27:04,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-10-29 13:27:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 480. [2020-10-29 13:27:04,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-10-29 13:27:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 718 transitions. [2020-10-29 13:27:04,749 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 718 transitions. Word has length 81 [2020-10-29 13:27:04,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:04,749 INFO L481 AbstractCegarLoop]: Abstraction has 480 states and 718 transitions. [2020-10-29 13:27:04,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:27:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 718 transitions. [2020-10-29 13:27:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:27:04,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:04,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:04,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:27:04,750 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:04,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1152902597, now seen corresponding path program 1 times [2020-10-29 13:27:04,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:04,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542353025] [2020-10-29 13:27:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:04,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:04,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:04,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:04,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:04,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:05,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:06,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:06,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:27:06,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:27:06,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2111 [2020-10-29 13:27:06,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:06,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:06,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:06,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-29 13:27:06,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:27:06,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:07,201 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:27:07,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:07,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:07,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:07,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:07,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:07,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:27:07,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:07,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:07,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:07,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:07,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:07,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:07,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542353025] [2020-10-29 13:27:07,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:07,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:27:07,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83276122] [2020-10-29 13:27:07,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:27:07,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:07,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:27:07,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:27:07,241 INFO L87 Difference]: Start difference. First operand 480 states and 718 transitions. Second operand 4 states. [2020-10-29 13:27:07,568 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:27:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:08,249 INFO L93 Difference]: Finished difference Result 1212 states and 1862 transitions. [2020-10-29 13:27:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:27:08,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-29 13:27:08,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:08,255 INFO L225 Difference]: With dead ends: 1212 [2020-10-29 13:27:08,255 INFO L226 Difference]: Without dead ends: 821 [2020-10-29 13:27:08,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:27:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2020-10-29 13:27:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 811. [2020-10-29 13:27:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2020-10-29 13:27:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1232 transitions. [2020-10-29 13:27:08,386 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1232 transitions. Word has length 81 [2020-10-29 13:27:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:08,386 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 1232 transitions. [2020-10-29 13:27:08,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:27:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1232 transitions. [2020-10-29 13:27:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:27:08,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:08,387 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] [2020-10-29 13:27:08,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:27:08,388 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:08,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:08,388 INFO L82 PathProgramCache]: Analyzing trace with hash 651488386, now seen corresponding path program 1 times [2020-10-29 13:27:08,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:08,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129232847] [2020-10-29 13:27:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:08,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:08,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:08,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:08,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:09,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:09,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:09,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:27:09,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:27:09,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1278 [2020-10-29 13:27:09,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:09,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:09,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:09,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 13:27:09,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:27:09,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:10,016 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:27:10,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:10,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:10,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:10,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:10,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:10,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:27:10,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:10,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:10,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:10,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:10,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129232847] [2020-10-29 13:27:10,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:10,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:27:10,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198337940] [2020-10-29 13:27:10,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:27:10,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:10,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:27:10,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:27:10,061 INFO L87 Difference]: Start difference. First operand 811 states and 1232 transitions. Second operand 4 states. [2020-10-29 13:27:10,391 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:27:11,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:11,152 INFO L93 Difference]: Finished difference Result 2173 states and 3348 transitions. [2020-10-29 13:27:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:27:11,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-29 13:27:11,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:11,159 INFO L225 Difference]: With dead ends: 2173 [2020-10-29 13:27:11,160 INFO L226 Difference]: Without dead ends: 1443 [2020-10-29 13:27:11,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:27:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2020-10-29 13:27:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1433. [2020-10-29 13:27:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1433 states. [2020-10-29 13:27:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 2187 transitions. [2020-10-29 13:27:11,392 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 2187 transitions. Word has length 82 [2020-10-29 13:27:11,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:11,392 INFO L481 AbstractCegarLoop]: Abstraction has 1433 states and 2187 transitions. [2020-10-29 13:27:11,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:27:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 2187 transitions. [2020-10-29 13:27:11,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:27:11,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:11,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:11,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:27:11,394 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:11,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:11,394 INFO L82 PathProgramCache]: Analyzing trace with hash -191176797, now seen corresponding path program 1 times [2020-10-29 13:27:11,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:11,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036068215] [2020-10-29 13:27:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:11,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:11,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:11,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:11,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:12,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:13,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:13,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:27:13,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:27:13,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2384 [2020-10-29 13:27:13,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:13,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:13,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:27:13,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:27:13,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:27:13,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:27:14,184 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:27:14,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:14,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:14,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:14,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:14,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:14,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:27:14,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:14,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:14,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:14,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:14,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:27:14,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:14,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036068215] [2020-10-29 13:27:14,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:14,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:27:14,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045731475] [2020-10-29 13:27:14,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:27:14,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:14,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:27:14,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:27:14,253 INFO L87 Difference]: Start difference. First operand 1433 states and 2187 transitions. Second operand 6 states. [2020-10-29 13:27:14,611 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:27:15,507 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:27:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:15,878 INFO L93 Difference]: Finished difference Result 4139 states and 6367 transitions. [2020-10-29 13:27:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:27:15,879 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-29 13:27:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:15,889 INFO L225 Difference]: With dead ends: 4139 [2020-10-29 13:27:15,889 INFO L226 Difference]: Without dead ends: 2780 [2020-10-29 13:27:15,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:27:15,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2020-10-29 13:27:16,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2777. [2020-10-29 13:27:16,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2777 states. [2020-10-29 13:27:16,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 4251 transitions. [2020-10-29 13:27:16,366 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 4251 transitions. Word has length 83 [2020-10-29 13:27:16,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:16,367 INFO L481 AbstractCegarLoop]: Abstraction has 2777 states and 4251 transitions. [2020-10-29 13:27:16,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:27:16,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 4251 transitions. [2020-10-29 13:27:16,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:27:16,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:16,368 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] [2020-10-29 13:27:16,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:27:16,368 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:16,369 INFO L82 PathProgramCache]: Analyzing trace with hash 870523486, now seen corresponding path program 1 times [2020-10-29 13:27:16,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:16,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861418210] [2020-10-29 13:27:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:16,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:16,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:16,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:16,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:17,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:17,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:27:17,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:27:17,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-29 13:27:17,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:17,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:17,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:17,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:27:17,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:27:17,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:17,341 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:27:17,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:17,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:17,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:17,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:17,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:17,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:27:17,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:17,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:17,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:17,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:17,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:17,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:17,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861418210] [2020-10-29 13:27:17,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:17,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:27:17,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258329538] [2020-10-29 13:27:17,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:27:17,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:17,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:27:17,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:27:17,382 INFO L87 Difference]: Start difference. First operand 2777 states and 4251 transitions. Second operand 4 states. [2020-10-29 13:27:17,704 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:27:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:18,980 INFO L93 Difference]: Finished difference Result 7802 states and 11963 transitions. [2020-10-29 13:27:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:27:18,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-29 13:27:18,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:18,999 INFO L225 Difference]: With dead ends: 7802 [2020-10-29 13:27:18,999 INFO L226 Difference]: Without dead ends: 5094 [2020-10-29 13:27:19,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:27:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5094 states. [2020-10-29 13:27:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5094 to 5091. [2020-10-29 13:27:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5091 states. [2020-10-29 13:27:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5091 states to 5091 states and 7740 transitions. [2020-10-29 13:27:19,897 INFO L78 Accepts]: Start accepts. Automaton has 5091 states and 7740 transitions. Word has length 83 [2020-10-29 13:27:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:19,898 INFO L481 AbstractCegarLoop]: Abstraction has 5091 states and 7740 transitions. [2020-10-29 13:27:19,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:27:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 5091 states and 7740 transitions. [2020-10-29 13:27:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:27:19,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:19,899 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] [2020-10-29 13:27:19,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:27:19,899 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:19,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1517834289, now seen corresponding path program 1 times [2020-10-29 13:27:19,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:19,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425449914] [2020-10-29 13:27:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:19,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:19,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:19,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:20,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:20,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:20,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:27:20,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:27:20,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1075 [2020-10-29 13:27:20,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:20,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:20,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:27:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:27:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:27:20,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:21,327 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:27:21,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:21,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:21,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:21,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:21,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:21,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:27:21,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:21,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:21,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:21,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:21,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:27:21,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:27:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:21,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425449914] [2020-10-29 13:27:21,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:21,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:27:21,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716540184] [2020-10-29 13:27:21,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:27:21,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:21,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:27:21,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:27:21,421 INFO L87 Difference]: Start difference. First operand 5091 states and 7740 transitions. Second operand 6 states. [2020-10-29 13:27:21,762 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:27:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:22,834 INFO L93 Difference]: Finished difference Result 10115 states and 15404 transitions. [2020-10-29 13:27:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:27:22,834 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-29 13:27:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:22,852 INFO L225 Difference]: With dead ends: 10115 [2020-10-29 13:27:22,852 INFO L226 Difference]: Without dead ends: 5091 [2020-10-29 13:27:22,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:27:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5091 states. [2020-10-29 13:27:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5091 to 5091. [2020-10-29 13:27:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5091 states. [2020-10-29 13:27:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5091 states to 5091 states and 7691 transitions. [2020-10-29 13:27:23,655 INFO L78 Accepts]: Start accepts. Automaton has 5091 states and 7691 transitions. Word has length 84 [2020-10-29 13:27:23,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:23,656 INFO L481 AbstractCegarLoop]: Abstraction has 5091 states and 7691 transitions. [2020-10-29 13:27:23,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:27:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand 5091 states and 7691 transitions. [2020-10-29 13:27:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:27:23,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:23,657 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] [2020-10-29 13:27:23,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:27:23,657 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2014269300, now seen corresponding path program 1 times [2020-10-29 13:27:23,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:23,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082099085] [2020-10-29 13:27:23,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:23,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:23,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:23,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:24,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:24,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:27:24,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:27:24,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-29 13:27:24,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:24,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 13:27:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:27:24,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:24,492 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:27:24,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:24,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:24,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:24,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:24,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:24,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:27:24,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:24,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:24,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:24,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:24,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:24,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:24,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082099085] [2020-10-29 13:27:24,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:24,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:27:24,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477115936] [2020-10-29 13:27:24,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:27:24,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:24,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:27:24,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:27:24,531 INFO L87 Difference]: Start difference. First operand 5091 states and 7691 transitions. Second operand 4 states. [2020-10-29 13:27:24,869 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:27:26,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:26,689 INFO L93 Difference]: Finished difference Result 14361 states and 21663 transitions. [2020-10-29 13:27:26,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:27:26,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-29 13:27:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:26,728 INFO L225 Difference]: With dead ends: 14361 [2020-10-29 13:27:26,728 INFO L226 Difference]: Without dead ends: 9341 [2020-10-29 13:27:26,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:27:26,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2020-10-29 13:27:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 9325. [2020-10-29 13:27:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9325 states. [2020-10-29 13:27:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9325 states to 9325 states and 13937 transitions. [2020-10-29 13:27:27,984 INFO L78 Accepts]: Start accepts. Automaton has 9325 states and 13937 transitions. Word has length 84 [2020-10-29 13:27:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:27,984 INFO L481 AbstractCegarLoop]: Abstraction has 9325 states and 13937 transitions. [2020-10-29 13:27:27,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:27:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 9325 states and 13937 transitions. [2020-10-29 13:27:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:27:27,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:27,985 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] [2020-10-29 13:27:27,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:27:27,985 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:27,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:27,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2030219962, now seen corresponding path program 1 times [2020-10-29 13:27:27,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:27,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163377538] [2020-10-29 13:27:27,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:28,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:28,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:28,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:28,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:28,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:27:28,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:27:28,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-29 13:27:28,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:28,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:28,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:27:28,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:27:28,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:27:28,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:29,130 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:27:29,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:29,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:29,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:29,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:29,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:29,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:27:29,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:29,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:29,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:29,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:29,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:27:29,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:29,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163377538] [2020-10-29 13:27:29,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:29,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:27:29,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110583689] [2020-10-29 13:27:29,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:27:29,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:29,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:27:29,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:27:29,188 INFO L87 Difference]: Start difference. First operand 9325 states and 13937 transitions. Second operand 6 states. [2020-10-29 13:27:29,586 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:27:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:31,346 INFO L93 Difference]: Finished difference Result 18592 states and 27811 transitions. [2020-10-29 13:27:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:27:31,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-29 13:27:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:31,373 INFO L225 Difference]: With dead ends: 18592 [2020-10-29 13:27:31,374 INFO L226 Difference]: Without dead ends: 9325 [2020-10-29 13:27:31,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:27:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9325 states. [2020-10-29 13:27:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9325 to 9325. [2020-10-29 13:27:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9325 states. [2020-10-29 13:27:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9325 states to 9325 states and 13841 transitions. [2020-10-29 13:27:32,732 INFO L78 Accepts]: Start accepts. Automaton has 9325 states and 13841 transitions. Word has length 85 [2020-10-29 13:27:32,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:32,733 INFO L481 AbstractCegarLoop]: Abstraction has 9325 states and 13841 transitions. [2020-10-29 13:27:32,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:27:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 9325 states and 13841 transitions. [2020-10-29 13:27:32,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:27:32,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:32,733 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] [2020-10-29 13:27:32,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:27:32,734 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:32,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:32,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1705897183, now seen corresponding path program 1 times [2020-10-29 13:27:32,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:32,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990260946] [2020-10-29 13:27:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:32,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:32,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:32,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:32,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:27:32,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:27:32,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-29 13:27:32,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:32,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:32,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:32,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:27:32,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:27:32,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:33,271 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:27:33,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:33,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:33,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:33,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:33,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:33,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:27:33,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:33,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:33,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:33,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:33,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:33,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:33,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990260946] [2020-10-29 13:27:33,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:33,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:27:33,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621225873] [2020-10-29 13:27:33,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:27:33,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:33,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:27:33,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:27:33,306 INFO L87 Difference]: Start difference. First operand 9325 states and 13841 transitions. Second operand 4 states. [2020-10-29 13:27:33,635 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:27:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:36,647 INFO L93 Difference]: Finished difference Result 26323 states and 38901 transitions. [2020-10-29 13:27:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:27:36,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-29 13:27:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:36,684 INFO L225 Difference]: With dead ends: 26323 [2020-10-29 13:27:36,685 INFO L226 Difference]: Without dead ends: 17053 [2020-10-29 13:27:36,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:27:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17053 states. [2020-10-29 13:27:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17053 to 17044. [2020-10-29 13:27:39,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17044 states. [2020-10-29 13:27:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17044 states to 17044 states and 24915 transitions. [2020-10-29 13:27:39,299 INFO L78 Accepts]: Start accepts. Automaton has 17044 states and 24915 transitions. Word has length 85 [2020-10-29 13:27:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:39,300 INFO L481 AbstractCegarLoop]: Abstraction has 17044 states and 24915 transitions. [2020-10-29 13:27:39,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:27:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 17044 states and 24915 transitions. [2020-10-29 13:27:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:27:39,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:39,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:39,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:27:39,301 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:39,301 INFO L82 PathProgramCache]: Analyzing trace with hash -923022565, now seen corresponding path program 1 times [2020-10-29 13:27:39,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:39,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214976622] [2020-10-29 13:27:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:39,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:39,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:39,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:39,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:27:39,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:27:39,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-29 13:27:39,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:39,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:39,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:27:39,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:27:39,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:27:39,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:40,091 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:27:40,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:40,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:40,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:40,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:40,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:40,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:27:40,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:40,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:40,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:40,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:40,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:27:40,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:40,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214976622] [2020-10-29 13:27:40,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:40,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:27:40,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473462668] [2020-10-29 13:27:40,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:27:40,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:40,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:27:40,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:27:40,137 INFO L87 Difference]: Start difference. First operand 17044 states and 24915 transitions. Second operand 6 states. [2020-10-29 13:27:40,496 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:27:42,076 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:27:46,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:46,275 INFO L93 Difference]: Finished difference Result 50842 states and 74263 transitions. [2020-10-29 13:27:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:27:46,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-29 13:27:46,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:46,325 INFO L225 Difference]: With dead ends: 50842 [2020-10-29 13:27:46,326 INFO L226 Difference]: Without dead ends: 33847 [2020-10-29 13:27:46,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:27:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33847 states. [2020-10-29 13:27:51,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33847 to 33844. [2020-10-29 13:27:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33844 states. [2020-10-29 13:27:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33844 states to 33844 states and 49203 transitions. [2020-10-29 13:27:51,929 INFO L78 Accepts]: Start accepts. Automaton has 33844 states and 49203 transitions. Word has length 86 [2020-10-29 13:27:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:51,929 INFO L481 AbstractCegarLoop]: Abstraction has 33844 states and 49203 transitions. [2020-10-29 13:27:51,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:27:51,929 INFO L276 IsEmpty]: Start isEmpty. Operand 33844 states and 49203 transitions. [2020-10-29 13:27:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:27:51,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:51,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:51,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:27:51,930 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:51,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1903450880, now seen corresponding path program 1 times [2020-10-29 13:27:51,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:51,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237088410] [2020-10-29 13:27:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:51,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:52,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:52,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:27:52,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:52,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-29 13:27:52,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:52,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:52,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:27:52,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-29 13:27:52,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:27:52,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:52,484 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:27:52,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:52,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:52,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:52,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:52,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:52,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:27:52,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:52,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:52,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:52,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237088410] [2020-10-29 13:27:52,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:52,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:27:52,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155879457] [2020-10-29 13:27:52,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:27:52,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:52,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:27:52,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:27:52,514 INFO L87 Difference]: Start difference. First operand 33844 states and 49203 transitions. Second operand 5 states. [2020-10-29 13:28:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:02,055 INFO L93 Difference]: Finished difference Result 61017 states and 88423 transitions. [2020-10-29 13:28:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:28:02,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-29 13:28:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:02,235 INFO L225 Difference]: With dead ends: 61017 [2020-10-29 13:28:02,236 INFO L226 Difference]: Without dead ends: 61014 [2020-10-29 13:28:02,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:28:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61014 states. [2020-10-29 13:28:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61014 to 34868. [2020-10-29 13:28:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34868 states. [2020-10-29 13:28:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34868 states to 34868 states and 50099 transitions. [2020-10-29 13:28:08,193 INFO L78 Accepts]: Start accepts. Automaton has 34868 states and 50099 transitions. Word has length 86 [2020-10-29 13:28:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:08,194 INFO L481 AbstractCegarLoop]: Abstraction has 34868 states and 50099 transitions. [2020-10-29 13:28:08,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:28:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 34868 states and 50099 transitions. [2020-10-29 13:28:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-29 13:28:08,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:08,204 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:08,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:28:08,204 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:08,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2074962194, now seen corresponding path program 1 times [2020-10-29 13:28:08,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:08,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452807945] [2020-10-29 13:28:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:08,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:08,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:08,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:08,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:08,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:08,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:11,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:12,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:12,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:12,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:13,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:13,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-29 13:28:13,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:28:13,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:28:13,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:13,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:13,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:28:13,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 13:28:13,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-29 13:28:13,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:13,603 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:28:13,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:13,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:13,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:13,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:13,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:13,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:28:13,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:13,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:13,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:13,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:13,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:13,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:13,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452807945] [2020-10-29 13:28:13,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:28:13,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:28:13,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888216400] [2020-10-29 13:28:13,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:28:13,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:13,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:28:13,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:28:13,648 INFO L87 Difference]: Start difference. First operand 34868 states and 50099 transitions. Second operand 6 states. [2020-10-29 13:28:14,017 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:28:15,682 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:28:16,216 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:28:25,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:25,410 INFO L93 Difference]: Finished difference Result 102627 states and 148327 transitions. [2020-10-29 13:28:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:28:25,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-10-29 13:28:25,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:25,493 INFO L225 Difference]: With dead ends: 102627 [2020-10-29 13:28:25,494 INFO L226 Difference]: Without dead ends: 67808 [2020-10-29 13:28:25,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:28:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67808 states. [2020-10-29 13:28:36,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67808 to 67764. [2020-10-29 13:28:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67764 states. [2020-10-29 13:28:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67764 states to 67764 states and 97459 transitions. [2020-10-29 13:28:36,757 INFO L78 Accepts]: Start accepts. Automaton has 67764 states and 97459 transitions. Word has length 117 [2020-10-29 13:28:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:36,757 INFO L481 AbstractCegarLoop]: Abstraction has 67764 states and 97459 transitions. [2020-10-29 13:28:36,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:28:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 67764 states and 97459 transitions. [2020-10-29 13:28:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-29 13:28:36,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:36,771 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:36,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:28:36,771 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:36,771 INFO L82 PathProgramCache]: Analyzing trace with hash 773058396, now seen corresponding path program 1 times [2020-10-29 13:28:36,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:36,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153220745] [2020-10-29 13:28:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:36,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:36,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:36,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:36,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:37,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:37,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:39,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:39,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:39,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:40,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:40,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:41,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:41,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-29 13:28:41,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:28:41,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:28:41,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:41,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:28:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 13:28:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-29 13:28:41,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:42,129 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:28:42,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:42,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:42,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:42,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:42,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:42,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:28:42,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:42,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:42,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:42,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:42,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:42,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:42,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153220745] [2020-10-29 13:28:42,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:28:42,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:28:42,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338408221] [2020-10-29 13:28:42,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:28:42,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:28:42,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:28:42,168 INFO L87 Difference]: Start difference. First operand 67764 states and 97459 transitions. Second operand 6 states. [2020-10-29 13:28:42,513 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:28:44,141 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:28:44,687 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:28:59,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:59,631 INFO L93 Difference]: Finished difference Result 169331 states and 243767 transitions. [2020-10-29 13:28:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:28:59,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-10-29 13:28:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:59,799 INFO L225 Difference]: With dead ends: 169331 [2020-10-29 13:28:59,799 INFO L226 Difference]: Without dead ends: 101616 [2020-10-29 13:29:00,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:29:00,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101616 states. [2020-10-29 13:29:15,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101616 to 97012. [2020-10-29 13:29:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97012 states. [2020-10-29 13:29:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97012 states to 97012 states and 140019 transitions. [2020-10-29 13:29:16,236 INFO L78 Accepts]: Start accepts. Automaton has 97012 states and 140019 transitions. Word has length 117 [2020-10-29 13:29:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:16,236 INFO L481 AbstractCegarLoop]: Abstraction has 97012 states and 140019 transitions. [2020-10-29 13:29:16,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:29:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 97012 states and 140019 transitions. [2020-10-29 13:29:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-29 13:29:16,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:16,259 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:16,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 13:29:16,260 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash 36956514, now seen corresponding path program 1 times [2020-10-29 13:29:16,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:16,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856968157] [2020-10-29 13:29:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:16,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:16,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:16,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:16,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:16,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:16,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:18,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:18,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:19,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:19,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:19,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:21,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:21,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-29 13:29:21,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:29:21,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:29:21,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:21,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:21,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:29:21,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 13:29:21,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-29 13:29:21,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:21,658 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:29:21,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:21,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:21,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:21,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:21,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:21,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:29:21,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:21,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:21,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:21,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:21,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:21,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:21,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856968157] [2020-10-29 13:29:21,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:29:21,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:29:21,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085108825] [2020-10-29 13:29:21,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:29:21,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:21,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:29:21,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:29:21,701 INFO L87 Difference]: Start difference. First operand 97012 states and 140019 transitions. Second operand 6 states. [2020-10-29 13:29:22,064 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:29:23,873 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:29:24,473 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 183