/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:44:58,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:44:58,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:44:58,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:44:58,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:44:58,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:44:58,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:44:58,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:44:58,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:44:58,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:44:58,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:44:58,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:44:58,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:44:58,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:44:58,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:44:58,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:44:58,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:44:58,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:44:58,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:44:58,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:44:58,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:44:58,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:44:58,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:44:58,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:44:58,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:44:58,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:44:58,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:44:58,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:44:58,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:44:58,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:44:58,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:44:58,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:44:58,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:44:58,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:44:58,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:44:58,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:44:58,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:44:58,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:44:58,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:44:58,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:44:58,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:44:58,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:44:59,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:44:59,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:44:59,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:44:59,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:44:59,027 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:44:59,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:44:59,027 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:44:59,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:44:59,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:44:59,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:44:59,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:44:59,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:44:59,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:44:59,028 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:44:59,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:44:59,029 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:44:59,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:44:59,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:44:59,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:44:59,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:44:59,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:44:59,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:44:59,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:44:59,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:44:59,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:44:59,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:44:59,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:44:59,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:44:59,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:44:59,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:44:59,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:44:59,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:44:59,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:44:59,514 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:44:59,515 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:44:59,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:44:59,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0bb7d6228/d2e6cec52c3346658780028de22d95e9/FLAGd061c2f64 [2020-10-27 05:45:00,356 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:45:00,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:45:00,371 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0bb7d6228/d2e6cec52c3346658780028de22d95e9/FLAGd061c2f64 [2020-10-27 05:45:00,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0bb7d6228/d2e6cec52c3346658780028de22d95e9 [2020-10-27 05:45:00,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:45:00,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:45:00,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:45:00,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:45:00,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:45:00,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:45:00" (1/1) ... [2020-10-27 05:45:00,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c25f213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:00, skipping insertion in model container [2020-10-27 05:45:00,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:45:00" (1/1) ... [2020-10-27 05:45:00,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:45:00,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:45:01,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:45:01,139 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:45:01,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:45:01,305 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:45:01,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:01 WrapperNode [2020-10-27 05:45:01,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:45:01,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:45:01,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:45:01,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:45:01,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:01" (1/1) ... [2020-10-27 05:45:01,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:01" (1/1) ... [2020-10-27 05:45:01,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:01" (1/1) ... [2020-10-27 05:45:01,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:01" (1/1) ... [2020-10-27 05:45:01,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:01" (1/1) ... [2020-10-27 05:45:01,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:01" (1/1) ... [2020-10-27 05:45:01,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:01" (1/1) ... [2020-10-27 05:45:01,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:45:01,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:45:01,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:45:01,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:45:01,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:45:01,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:45:01,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:45:01,475 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:45:01,475 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:45:01,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:45:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:45:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:45:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:45:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:45:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:45:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:45:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:45:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:45:01,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:45:01,479 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:45:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:45:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:45:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:45:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:45:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:45:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:45:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:45:01,481 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:45:01,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:45:01,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:45:01,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:45:01,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:45:01,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:45:01,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:45:02,391 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:45:02,391 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:45:02,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:45:02 BoogieIcfgContainer [2020-10-27 05:45:02,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:45:02,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:45:02,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:45:02,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:45:02,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:45:00" (1/3) ... [2020-10-27 05:45:02,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547a2291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:45:02, skipping insertion in model container [2020-10-27 05:45:02,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:01" (2/3) ... [2020-10-27 05:45:02,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547a2291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:45:02, skipping insertion in model container [2020-10-27 05:45:02,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:45:02" (3/3) ... [2020-10-27 05:45:02,403 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:45:02,416 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:45:02,422 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:45:02,436 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:45:02,465 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:45:02,465 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:45:02,465 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:45:02,465 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:45:02,466 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:45:02,466 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:45:02,466 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:45:02,466 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:45:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states. [2020-10-27 05:45:02,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:45:02,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:02,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:45:02,498 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:02,505 INFO L82 PathProgramCache]: Analyzing trace with hash 816147482, now seen corresponding path program 1 times [2020-10-27 05:45:02,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:02,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623836150] [2020-10-27 05:45:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:02,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:03,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:03,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:03,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:06,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:06,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:45:06,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:45:06,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3620 [2020-10-27 05:45:06,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:06,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:45:06,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:45:06,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:45:06,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:45:06,823 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:45:06,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:06,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:06,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:06,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:06,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:06,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 05:45:06,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:06,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:06,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:06,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:06,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:45:06,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623836150] [2020-10-27 05:45:06,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:06,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:45:06,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757553442] [2020-10-27 05:45:07,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:45:07,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:07,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:45:07,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:45:07,055 INFO L87 Difference]: Start difference. First operand 121 states. Second operand 7 states. [2020-10-27 05:45:07,481 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 05:45:08,581 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:45:08,855 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:45:09,120 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:45:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:09,185 INFO L93 Difference]: Finished difference Result 556 states and 874 transitions. [2020-10-27 05:45:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 05:45:09,187 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-27 05:45:09,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:09,205 INFO L225 Difference]: With dead ends: 556 [2020-10-27 05:45:09,206 INFO L226 Difference]: Without dead ends: 446 [2020-10-27 05:45:09,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:45:09,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-27 05:45:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 194. [2020-10-27 05:45:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-27 05:45:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 289 transitions. [2020-10-27 05:45:09,298 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 289 transitions. Word has length 54 [2020-10-27 05:45:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:09,298 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 289 transitions. [2020-10-27 05:45:09,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:45:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 289 transitions. [2020-10-27 05:45:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:45:09,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:09,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:45:09,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:45:09,303 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:09,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1043986931, now seen corresponding path program 1 times [2020-10-27 05:45:09,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:09,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088857575] [2020-10-27 05:45:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:09,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:09,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:09,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:09,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:10,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:10,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:45:10,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:45:10,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1200 [2020-10-27 05:45:10,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:10,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:10,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 05:45:10,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 05:45:10,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:10,840 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:45:10,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:10,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:10,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:10,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:10,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:10,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:45:10,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:10,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:10,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:10,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:10,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:45:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:45:10,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088857575] [2020-10-27 05:45:10,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:10,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:45:10,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811448130] [2020-10-27 05:45:10,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:45:10,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:10,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:45:10,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:45:10,946 INFO L87 Difference]: Start difference. First operand 194 states and 289 transitions. Second operand 4 states. [2020-10-27 05:45:11,275 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:45:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:11,906 INFO L93 Difference]: Finished difference Result 488 states and 753 transitions. [2020-10-27 05:45:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:45:11,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-27 05:45:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:11,910 INFO L225 Difference]: With dead ends: 488 [2020-10-27 05:45:11,911 INFO L226 Difference]: Without dead ends: 325 [2020-10-27 05:45:11,913 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 [2020-10-27 05:45:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-27 05:45:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2020-10-27 05:45:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-27 05:45:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 491 transitions. [2020-10-27 05:45:11,945 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 491 transitions. Word has length 55 [2020-10-27 05:45:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:11,946 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 491 transitions. [2020-10-27 05:45:11,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:45:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 491 transitions. [2020-10-27 05:45:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:45:11,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:11,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:45:11,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:45:11,950 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:11,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:11,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1551212949, now seen corresponding path program 1 times [2020-10-27 05:45:11,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:11,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171721819] [2020-10-27 05:45:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:12,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:12,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:12,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:12,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:12,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:45:12,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:45:12,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-27 05:45:12,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:12,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:12,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 05:45:12,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 05:45:12,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:12,942 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:45:12,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:12,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:12,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:12,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:12,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:12,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:45:12,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:12,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:12,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:12,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:12,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:45:12,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171721819] [2020-10-27 05:45:12,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:12,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:45:12,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812229978] [2020-10-27 05:45:12,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:45:12,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:12,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:45:12,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:45:12,987 INFO L87 Difference]: Start difference. First operand 322 states and 491 transitions. Second operand 4 states. [2020-10-27 05:45:13,226 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:45:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:13,917 INFO L93 Difference]: Finished difference Result 840 states and 1307 transitions. [2020-10-27 05:45:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:45:13,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-27 05:45:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:13,921 INFO L225 Difference]: With dead ends: 840 [2020-10-27 05:45:13,921 INFO L226 Difference]: Without dead ends: 549 [2020-10-27 05:45:13,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:45:13,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-27 05:45:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 546. [2020-10-27 05:45:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-10-27 05:45:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 841 transitions. [2020-10-27 05:45:13,992 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 841 transitions. Word has length 56 [2020-10-27 05:45:13,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:13,995 INFO L481 AbstractCegarLoop]: Abstraction has 546 states and 841 transitions. [2020-10-27 05:45:13,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:45:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 841 transitions. [2020-10-27 05:45:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:45:14,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:14,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:45:14,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:45:14,005 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:14,006 INFO L82 PathProgramCache]: Analyzing trace with hash 925803340, now seen corresponding path program 1 times [2020-10-27 05:45:14,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:14,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244737226] [2020-10-27 05:45:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:14,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:14,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:14,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:14,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:45:14,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:45:14,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-27 05:45:14,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:14,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:14,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 05:45:14,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 05:45:14,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 05:45:14,650 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:45:14,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:14,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:14,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:14,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:14,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:14,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:45:14,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:14,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:14,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:14,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:14,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:45:14,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244737226] [2020-10-27 05:45:14,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:14,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:45:14,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987974541] [2020-10-27 05:45:14,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:45:14,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:14,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:45:14,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:45:14,704 INFO L87 Difference]: Start difference. First operand 546 states and 841 transitions. Second operand 4 states. [2020-10-27 05:45:14,971 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:45:15,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:15,527 INFO L93 Difference]: Finished difference Result 1448 states and 2253 transitions. [2020-10-27 05:45:15,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:45:15,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-27 05:45:15,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:15,534 INFO L225 Difference]: With dead ends: 1448 [2020-10-27 05:45:15,534 INFO L226 Difference]: Without dead ends: 933 [2020-10-27 05:45:15,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:45:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2020-10-27 05:45:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 930. [2020-10-27 05:45:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2020-10-27 05:45:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1433 transitions. [2020-10-27 05:45:15,598 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1433 transitions. Word has length 57 [2020-10-27 05:45:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:15,598 INFO L481 AbstractCegarLoop]: Abstraction has 930 states and 1433 transitions. [2020-10-27 05:45:15,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:45:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1433 transitions. [2020-10-27 05:45:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:45:15,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:15,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:45:15,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:45:15,600 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:15,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1945751650, now seen corresponding path program 1 times [2020-10-27 05:45:15,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:15,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946866820] [2020-10-27 05:45:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:15,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:16,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:16,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:45:16,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:45:16,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-10-27 05:45:16,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:16,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:45:16,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:45:16,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:45:16,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:16,520 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:45:16,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:16,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:16,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:16,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:16,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:16,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:45:16,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:16,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:16,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:16,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:16,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:45:16,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946866820] [2020-10-27 05:45:16,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:16,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:45:16,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289889679] [2020-10-27 05:45:16,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:45:16,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:16,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:45:16,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:45:16,583 INFO L87 Difference]: Start difference. First operand 930 states and 1433 transitions. Second operand 7 states. [2020-10-27 05:45:17,448 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:45:17,717 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:45:17,968 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:45:18,201 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:45:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:19,077 INFO L93 Difference]: Finished difference Result 4038 states and 6241 transitions. [2020-10-27 05:45:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 05:45:19,078 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-27 05:45:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:19,098 INFO L225 Difference]: With dead ends: 4038 [2020-10-27 05:45:19,099 INFO L226 Difference]: Without dead ends: 3139 [2020-10-27 05:45:19,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:45:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2020-10-27 05:45:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3130. [2020-10-27 05:45:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3130 states. [2020-10-27 05:45:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 4817 transitions. [2020-10-27 05:45:19,376 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 4817 transitions. Word has length 58 [2020-10-27 05:45:19,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:19,377 INFO L481 AbstractCegarLoop]: Abstraction has 3130 states and 4817 transitions. [2020-10-27 05:45:19,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:45:19,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 4817 transitions. [2020-10-27 05:45:19,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:45:19,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:19,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:45:19,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:45:19,380 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:19,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1564816550, now seen corresponding path program 1 times [2020-10-27 05:45:19,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:19,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274546653] [2020-10-27 05:45:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:19,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:19,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:19,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:19,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:45:19,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:45:19,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-27 05:45:19,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:19,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 05:45:19,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 05:45:19,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:45:20,012 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:45:20,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:20,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:20,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:20,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:20,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:20,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:45:20,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:20,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:20,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:20,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:20,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:45:20,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274546653] [2020-10-27 05:45:20,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:20,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:45:20,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36289157] [2020-10-27 05:45:20,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:45:20,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:20,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:45:20,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:45:20,063 INFO L87 Difference]: Start difference. First operand 3130 states and 4817 transitions. Second operand 4 states. [2020-10-27 05:45:20,324 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:45:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:21,488 INFO L93 Difference]: Finished difference Result 8256 states and 12661 transitions. [2020-10-27 05:45:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:45:21,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-27 05:45:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:21,518 INFO L225 Difference]: With dead ends: 8256 [2020-10-27 05:45:21,518 INFO L226 Difference]: Without dead ends: 5157 [2020-10-27 05:45:21,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:45:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2020-10-27 05:45:21,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 5154. [2020-10-27 05:45:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5154 states. [2020-10-27 05:45:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5154 states to 5154 states and 7809 transitions. [2020-10-27 05:45:21,980 INFO L78 Accepts]: Start accepts. Automaton has 5154 states and 7809 transitions. Word has length 59 [2020-10-27 05:45:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:21,981 INFO L481 AbstractCegarLoop]: Abstraction has 5154 states and 7809 transitions. [2020-10-27 05:45:21,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:45:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 5154 states and 7809 transitions. [2020-10-27 05:45:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:45:21,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:21,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:45:21,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:45:21,983 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:21,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:21,983 INFO L82 PathProgramCache]: Analyzing trace with hash 241985895, now seen corresponding path program 1 times [2020-10-27 05:45:21,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:21,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436967331] [2020-10-27 05:45:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:22,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:22,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:22,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:22,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:45:22,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:45:22,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-10-27 05:45:22,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:22,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:45:22,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:45:22,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 05:45:22,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:22,818 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:45:22,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:22,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:22,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:22,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:22,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:22,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:45:22,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:22,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:45:22,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:45:22,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436967331] [2020-10-27 05:45:22,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:22,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:45:22,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020059078] [2020-10-27 05:45:22,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:45:22,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:22,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:45:22,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:45:22,930 INFO L87 Difference]: Start difference. First operand 5154 states and 7809 transitions. Second operand 6 states. [2020-10-27 05:45:23,175 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:45:24,112 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:45:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:24,648 INFO L93 Difference]: Finished difference Result 15288 states and 23141 transitions. [2020-10-27 05:45:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:45:24,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-27 05:45:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:24,700 INFO L225 Difference]: With dead ends: 15288 [2020-10-27 05:45:24,700 INFO L226 Difference]: Without dead ends: 10165 [2020-10-27 05:45:24,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:45:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10165 states. [2020-10-27 05:45:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10165 to 10162. [2020-10-27 05:45:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10162 states. [2020-10-27 05:45:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10162 states to 10162 states and 15249 transitions. [2020-10-27 05:45:25,500 INFO L78 Accepts]: Start accepts. Automaton has 10162 states and 15249 transitions. Word has length 60 [2020-10-27 05:45:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:25,500 INFO L481 AbstractCegarLoop]: Abstraction has 10162 states and 15249 transitions. [2020-10-27 05:45:25,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:45:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 10162 states and 15249 transitions. [2020-10-27 05:45:25,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:45:25,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:25,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:45:25,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:45:25,502 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:25,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:25,502 INFO L82 PathProgramCache]: Analyzing trace with hash -723466036, now seen corresponding path program 1 times [2020-10-27 05:45:25,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:25,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291965496] [2020-10-27 05:45:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:25,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:25,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:25,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:45:25,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:25,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-27 05:45:25,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:45:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 05:45:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:45:25,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:26,120 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:45:26,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:26,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:26,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:26,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:26,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:26,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:45:26,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:26,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:26,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:26,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:26,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:45:26,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291965496] [2020-10-27 05:45:26,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:26,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:45:26,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076228384] [2020-10-27 05:45:26,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:45:26,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:26,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:45:26,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:45:26,173 INFO L87 Difference]: Start difference. First operand 10162 states and 15249 transitions. Second operand 5 states. [2020-10-27 05:45:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:28,181 INFO L93 Difference]: Finished difference Result 20805 states and 30979 transitions. [2020-10-27 05:45:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:45:28,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-10-27 05:45:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:28,251 INFO L225 Difference]: With dead ends: 20805 [2020-10-27 05:45:28,252 INFO L226 Difference]: Without dead ends: 20802 [2020-10-27 05:45:28,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:45:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20802 states. [2020-10-27 05:45:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20802 to 10674. [2020-10-27 05:45:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10674 states. [2020-10-27 05:45:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10674 states to 10674 states and 15761 transitions. [2020-10-27 05:45:29,341 INFO L78 Accepts]: Start accepts. Automaton has 10674 states and 15761 transitions. Word has length 60 [2020-10-27 05:45:29,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:29,342 INFO L481 AbstractCegarLoop]: Abstraction has 10674 states and 15761 transitions. [2020-10-27 05:45:29,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:45:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 10674 states and 15761 transitions. [2020-10-27 05:45:29,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:45:29,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:29,343 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] [2020-10-27 05:45:29,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:45:29,343 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:29,344 INFO L82 PathProgramCache]: Analyzing trace with hash -654638388, now seen corresponding path program 1 times [2020-10-27 05:45:29,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:29,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948100865] [2020-10-27 05:45:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:29,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:29,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:29,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:45:29,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:29,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 05:45:29,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:29,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:29,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:45:29,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:45:29,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:29,768 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:45:29,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:29,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:29,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:29,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:29,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:29,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:45:29,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:29,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:29,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:29,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:29,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:45:29,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948100865] [2020-10-27 05:45:29,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:29,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:45:29,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610925310] [2020-10-27 05:45:29,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:45:29,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:45:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:45:29,815 INFO L87 Difference]: Start difference. First operand 10674 states and 15761 transitions. Second operand 4 states. [2020-10-27 05:45:30,123 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:45:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:31,670 INFO L93 Difference]: Finished difference Result 23794 states and 35083 transitions. [2020-10-27 05:45:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:45:31,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-27 05:45:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:31,709 INFO L225 Difference]: With dead ends: 23794 [2020-10-27 05:45:31,710 INFO L226 Difference]: Without dead ends: 13151 [2020-10-27 05:45:31,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:45:31,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13151 states. [2020-10-27 05:45:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13151 to 13092. [2020-10-27 05:45:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13092 states. [2020-10-27 05:45:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13092 states to 13092 states and 19183 transitions. [2020-10-27 05:45:32,855 INFO L78 Accepts]: Start accepts. Automaton has 13092 states and 19183 transitions. Word has length 61 [2020-10-27 05:45:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:32,856 INFO L481 AbstractCegarLoop]: Abstraction has 13092 states and 19183 transitions. [2020-10-27 05:45:32,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:45:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 13092 states and 19183 transitions. [2020-10-27 05:45:32,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:45:32,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:32,864 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:45:32,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:45:32,864 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:32,865 INFO L82 PathProgramCache]: Analyzing trace with hash -861966590, now seen corresponding path program 1 times [2020-10-27 05:45:32,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:32,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100589886] [2020-10-27 05:45:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:32,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:32,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:32,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:33,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:33,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:33,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:37,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:37,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:45:37,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:45:37,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:45:37,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:37,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:45:37,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:45:37,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:45:37,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:38,280 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 27 [2020-10-27 05:45:38,570 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:45:38,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:38,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:38,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:38,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:38,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:38,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:45:38,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:38,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:38,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:38,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:38,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:45:38,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100589886] [2020-10-27 05:45:38,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:45:38,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:45:38,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117388365] [2020-10-27 05:45:38,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:45:38,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:38,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:45:38,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:45:38,670 INFO L87 Difference]: Start difference. First operand 13092 states and 19183 transitions. Second operand 10 states. [2020-10-27 05:45:38,969 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:45:39,420 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-27 05:45:40,380 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-27 05:45:41,218 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-27 05:45:42,656 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-27 05:45:43,286 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:45:43,578 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-27 05:45:43,930 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:45:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:48,032 INFO L93 Difference]: Finished difference Result 63448 states and 92308 transitions. [2020-10-27 05:45:48,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:45:48,033 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-10-27 05:45:48,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:48,207 INFO L225 Difference]: With dead ends: 63448 [2020-10-27 05:45:48,207 INFO L226 Difference]: Without dead ends: 58225 [2020-10-27 05:45:48,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:45:48,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58225 states. [2020-10-27 05:45:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58225 to 25240. [2020-10-27 05:45:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25240 states. [2020-10-27 05:45:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25240 states to 25240 states and 37059 transitions. [2020-10-27 05:45:51,456 INFO L78 Accepts]: Start accepts. Automaton has 25240 states and 37059 transitions. Word has length 84 [2020-10-27 05:45:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:51,456 INFO L481 AbstractCegarLoop]: Abstraction has 25240 states and 37059 transitions. [2020-10-27 05:45:51,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:45:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 25240 states and 37059 transitions. [2020-10-27 05:45:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:45:51,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:51,465 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:45:51,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:45:51,466 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:51,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:51,466 INFO L82 PathProgramCache]: Analyzing trace with hash 550697347, now seen corresponding path program 1 times [2020-10-27 05:45:51,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:51,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139804887] [2020-10-27 05:45:51,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:51,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:51,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:51,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:51,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:51,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:52,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:52,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:55,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:55,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:56,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:56,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:45:56,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:45:56,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:45:56,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:45:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:45:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:45:56,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:57,010 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:45:57,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:57,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:57,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:57,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:57,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:57,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:45:57,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:57,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:45:57,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:45:57,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139804887] [2020-10-27 05:45:57,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:45:57,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:45:57,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655399120] [2020-10-27 05:45:57,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:45:57,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:57,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:45:57,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:45:57,107 INFO L87 Difference]: Start difference. First operand 25240 states and 37059 transitions. Second operand 11 states. [2020-10-27 05:45:57,423 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:46:01,959 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:46:02,361 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:46:02,669 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:46:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:11,804 INFO L93 Difference]: Finished difference Result 125264 states and 182456 transitions. [2020-10-27 05:46:11,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 05:46:11,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-10-27 05:46:11,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:11,997 INFO L225 Difference]: With dead ends: 125264 [2020-10-27 05:46:11,998 INFO L226 Difference]: Without dead ends: 100057 [2020-10-27 05:46:12,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 05:46:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100057 states. [2020-10-27 05:46:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100057 to 39172. [2020-10-27 05:46:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39172 states. [2020-10-27 05:46:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39172 states to 39172 states and 57243 transitions. [2020-10-27 05:46:16,894 INFO L78 Accepts]: Start accepts. Automaton has 39172 states and 57243 transitions. Word has length 84 [2020-10-27 05:46:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:16,895 INFO L481 AbstractCegarLoop]: Abstraction has 39172 states and 57243 transitions. [2020-10-27 05:46:16,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:46:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 39172 states and 57243 transitions. [2020-10-27 05:46:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:46:16,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:16,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:46:16,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:46:16,907 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:16,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1894423645, now seen corresponding path program 1 times [2020-10-27 05:46:16,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:16,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533265947] [2020-10-27 05:46:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:16,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:16,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:17,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:17,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:17,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:17,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:21,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:21,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:21,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:46:21,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:46:21,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:46:21,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:21,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:46:21,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:46:21,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:46:21,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:22,250 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:46:22,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:22,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:22,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:22,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:22,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:22,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 05:46:22,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:22,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:46:22,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:22,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:46:22,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:46:22,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533265947] [2020-10-27 05:46:22,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:46:22,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 05:46:22,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681607618] [2020-10-27 05:46:22,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:46:22,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:22,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:46:22,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:46:22,335 INFO L87 Difference]: Start difference. First operand 39172 states and 57243 transitions. Second operand 8 states. [2020-10-27 05:46:22,588 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:46:24,745 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:46:25,099 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:46:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:32,415 INFO L93 Difference]: Finished difference Result 113949 states and 166336 transitions. [2020-10-27 05:46:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:46:32,416 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-10-27 05:46:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:32,521 INFO L225 Difference]: With dead ends: 113949 [2020-10-27 05:46:32,522 INFO L226 Difference]: Without dead ends: 74810 [2020-10-27 05:46:32,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:46:32,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74810 states. [2020-10-27 05:46:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74810 to 40612. [2020-10-27 05:46:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40612 states. [2020-10-27 05:46:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40612 states to 40612 states and 58803 transitions. [2020-10-27 05:46:37,933 INFO L78 Accepts]: Start accepts. Automaton has 40612 states and 58803 transitions. Word has length 84 [2020-10-27 05:46:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:37,933 INFO L481 AbstractCegarLoop]: Abstraction has 40612 states and 58803 transitions. [2020-10-27 05:46:37,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:46:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 40612 states and 58803 transitions. [2020-10-27 05:46:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:46:37,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:37,945 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:46:37,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:46:37,945 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:37,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:37,945 INFO L82 PathProgramCache]: Analyzing trace with hash -987879714, now seen corresponding path program 1 times [2020-10-27 05:46:37,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:37,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461970327] [2020-10-27 05:46:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:37,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:38,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:38,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:38,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:38,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:39,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:42,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:42,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:46:42,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:46:42,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4076 [2020-10-27 05:46:42,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:42,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:46:42,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:46:42,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 05:46:42,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:42,441 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:46:42,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:42,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:42,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:42,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:42,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:42,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:46:42,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:42,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:46:42,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:42,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:46:42,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:46:42,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461970327] [2020-10-27 05:46:42,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:46:42,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 05:46:42,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82569840] [2020-10-27 05:46:42,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:46:42,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:46:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:46:42,515 INFO L87 Difference]: Start difference. First operand 40612 states and 58803 transitions. Second operand 8 states. [2020-10-27 05:46:42,796 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:46:45,116 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:46:45,655 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:46:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:56,628 INFO L93 Difference]: Finished difference Result 144578 states and 208495 transitions. [2020-10-27 05:46:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:46:56,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-10-27 05:46:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:56,773 INFO L225 Difference]: With dead ends: 144578 [2020-10-27 05:46:56,773 INFO L226 Difference]: Without dead ends: 103999 [2020-10-27 05:46:56,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:46:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103999 states. [2020-10-27 05:47:04,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103999 to 54298. [2020-10-27 05:47:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54298 states. [2020-10-27 05:47:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54298 states to 54298 states and 77136 transitions. [2020-10-27 05:47:04,246 INFO L78 Accepts]: Start accepts. Automaton has 54298 states and 77136 transitions. Word has length 84 [2020-10-27 05:47:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:47:04,246 INFO L481 AbstractCegarLoop]: Abstraction has 54298 states and 77136 transitions. [2020-10-27 05:47:04,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:47:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 54298 states and 77136 transitions. [2020-10-27 05:47:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:47:04,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:47:04,257 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:47:04,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:47:04,258 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:47:04,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:47:04,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1100078709, now seen corresponding path program 1 times [2020-10-27 05:47:04,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:47:04,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532618523] [2020-10-27 05:47:04,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:47:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:04,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:04,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:04,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:04,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:04,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:04,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:05,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:08,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:09,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:47:09,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:47:09,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:47:09,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:47:09,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:47:09,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:47:09,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:47:09,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 05:47:09,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:47:09,601 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:47:09,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:47:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:09,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:09,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:47:09,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:47:09,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:47:09,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:47:09,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:47:09,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:47:09,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:47:09,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:47:09,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:47:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:47:09,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532618523] [2020-10-27 05:47:09,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:47:09,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 05:47:09,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563545851] [2020-10-27 05:47:09,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:47:09,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:47:09,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:47:09,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:47:09,655 INFO L87 Difference]: Start difference. First operand 54298 states and 77136 transitions. Second operand 9 states. [2020-10-27 05:47:09,915 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:47:13,625 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:47:14,436 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:47:38,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:47:38,721 INFO L93 Difference]: Finished difference Result 257351 states and 363633 transitions. [2020-10-27 05:47:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:47:38,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-27 05:47:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:47:39,225 INFO L225 Difference]: With dead ends: 257351 [2020-10-27 05:47:39,225 INFO L226 Difference]: Without dead ends: 203086 [2020-10-27 05:47:39,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:47:39,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203086 states. [2020-10-27 05:47:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203086 to 77129. [2020-10-27 05:47:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77129 states. [2020-10-27 05:47:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77129 states to 77129 states and 107877 transitions. [2020-10-27 05:47:51,013 INFO L78 Accepts]: Start accepts. Automaton has 77129 states and 107877 transitions. Word has length 84 [2020-10-27 05:47:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:47:51,013 INFO L481 AbstractCegarLoop]: Abstraction has 77129 states and 107877 transitions. [2020-10-27 05:47:51,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:47:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 77129 states and 107877 transitions. [2020-10-27 05:47:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:47:51,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:47:51,028 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:47:51,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:47:51,028 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:47:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:47:51,028 INFO L82 PathProgramCache]: Analyzing trace with hash -445323757, now seen corresponding path program 1 times [2020-10-27 05:47:51,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:47:51,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465555303] [2020-10-27 05:47:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:47:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:51,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:51,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:51,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:47:51,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:47:51,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:47:51,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-10-27 05:47:51,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:47:51,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:47:51,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:47:51,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:47:51,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:47:51,848 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:47:51,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:47:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:51,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:51,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:47:51,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:47:51,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:47:51,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:47:51,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:47:51,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:47:51,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:47:51,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:47:51,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:47:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 05:47:51,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465555303] [2020-10-27 05:47:51,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:47:51,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:47:51,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617629129] [2020-10-27 05:47:51,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:47:51,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:47:51,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:47:51,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:47:51,924 INFO L87 Difference]: Start difference. First operand 77129 states and 107877 transitions. Second operand 6 states. [2020-10-27 05:47:52,416 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:47:54,616 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:48:13,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:48:13,354 INFO L93 Difference]: Finished difference Result 218803 states and 306722 transitions. [2020-10-27 05:48:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:48:13,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-27 05:48:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:48:13,783 INFO L225 Difference]: With dead ends: 218803 [2020-10-27 05:48:13,784 INFO L226 Difference]: Without dead ends: 141707 [2020-10-27 05:48:13,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:48:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141707 states. [2020-10-27 05:48:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141707 to 141704. [2020-10-27 05:48:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141704 states. [2020-10-27 05:48:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141704 states to 141704 states and 197649 transitions. [2020-10-27 05:48:34,313 INFO L78 Accepts]: Start accepts. Automaton has 141704 states and 197649 transitions. Word has length 84 [2020-10-27 05:48:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:48:34,314 INFO L481 AbstractCegarLoop]: Abstraction has 141704 states and 197649 transitions. [2020-10-27 05:48:34,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:48:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 141704 states and 197649 transitions. [2020-10-27 05:48:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:48:34,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:48:34,332 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:48:34,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:48:34,332 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:48:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:48:34,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1929058022, now seen corresponding path program 1 times [2020-10-27 05:48:34,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:48:34,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139100420] [2020-10-27 05:48:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:48:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:34,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:34,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:34,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking...