/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/loops-crafted-1/in-de41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:45:06,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:45:06,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:45:07,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:45:07,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:45:07,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:45:07,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:45:07,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:45:07,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:45:07,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:45:07,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:45:07,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:45:07,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:45:07,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:45:07,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:45:07,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:45:07,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:45:07,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:45:07,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:45:07,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:45:07,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:45:07,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:45:07,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:45:07,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:45:07,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:45:07,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:45:07,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:45:07,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:45:07,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:45:07,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:45:07,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:45:07,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:45:07,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:45:07,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:45:07,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:45:07,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:45:07,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:45:07,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:45:07,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:45:07,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:45:07,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:45:07,100 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 01:45:07,128 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:45:07,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:45:07,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:45:07,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:45:07,131 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:45:07,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:45:07,131 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:45:07,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:45:07,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:45:07,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:45:07,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:45:07,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:45:07,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:45:07,133 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:45:07,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:45:07,133 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:45:07,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:45:07,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:45:07,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:45:07,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:45:07,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:45:07,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:45:07,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:45:07,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:45:07,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:45:07,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:45:07,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:45:07,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:45:07,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:45:07,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:45:07,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:45:07,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:45:07,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:45:07,571 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:45:07,572 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:45:07,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de41.c [2020-10-27 01:45:07,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cb2db1d3/b8f125d3142a41008f901d73338b7dcc/FLAGf32808912 [2020-10-27 01:45:08,299 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:45:08,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de41.c [2020-10-27 01:45:08,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cb2db1d3/b8f125d3142a41008f901d73338b7dcc/FLAGf32808912 [2020-10-27 01:45:08,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cb2db1d3/b8f125d3142a41008f901d73338b7dcc [2020-10-27 01:45:08,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:45:08,666 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:45:08,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:45:08,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:45:08,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:45:08,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:45:08" (1/1) ... [2020-10-27 01:45:08,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a13bab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:08, skipping insertion in model container [2020-10-27 01:45:08,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:45:08" (1/1) ... [2020-10-27 01:45:08,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:45:08,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:45:08,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:45:08,903 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:45:08,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:45:08,949 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:45:08,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:08 WrapperNode [2020-10-27 01:45:08,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:45:08,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:45:08,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:45:08,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:45:08,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:08" (1/1) ... [2020-10-27 01:45:08,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:08" (1/1) ... [2020-10-27 01:45:08,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:08" (1/1) ... [2020-10-27 01:45:08,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:08" (1/1) ... [2020-10-27 01:45:09,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:08" (1/1) ... [2020-10-27 01:45:09,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:08" (1/1) ... [2020-10-27 01:45:09,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:08" (1/1) ... [2020-10-27 01:45:09,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:45:09,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:45:09,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:45:09,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:45:09,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:08" (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 01:45:09,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:45:09,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:45:09,134 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:45:09,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:45:09,134 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:45:09,134 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:45:09,134 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:45:09,135 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:45:09,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:45:09,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 01:45:09,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:45:09,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:45:09,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:45:09,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:45:09,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:45:09,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:45:09,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:45:09,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:45:09,472 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:45:09,473 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 01:45:09,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:45:09 BoogieIcfgContainer [2020-10-27 01:45:09,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:45:09,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:45:09,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:45:09,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:45:09,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:45:08" (1/3) ... [2020-10-27 01:45:09,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ab039d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:45:09, skipping insertion in model container [2020-10-27 01:45:09,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:45:08" (2/3) ... [2020-10-27 01:45:09,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ab039d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:45:09, skipping insertion in model container [2020-10-27 01:45:09,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:45:09" (3/3) ... [2020-10-27 01:45:09,487 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de41.c [2020-10-27 01:45:09,524 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:45:09,529 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:45:09,546 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:45:09,615 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:45:09,616 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:45:09,616 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:45:09,616 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:45:09,616 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:45:09,617 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:45:09,617 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:45:09,617 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:45:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-27 01:45:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:45:09,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:09,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:09,658 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:09,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1165252201, now seen corresponding path program 1 times [2020-10-27 01:45:09,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:09,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655067274] [2020-10-27 01:45:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:09,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:10,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:10,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:10,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:45:10,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:10,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-27 01:45:10,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:10,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:45:10,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:10,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:45:10,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 01:45:10,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:10,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:10,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:10,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:10,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:10,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:45:10,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:10,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:10,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:10,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:10,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:10,937 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 01:45:10,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655067274] [2020-10-27 01:45:10,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:45:10,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:45:10,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366185287] [2020-10-27 01:45:10,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:45:10,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:10,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:45:10,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:45:10,969 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-10-27 01:45:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:11,441 INFO L93 Difference]: Finished difference Result 57 states and 83 transitions. [2020-10-27 01:45:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:45:11,443 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-27 01:45:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:11,451 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:45:11,451 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 01:45:11,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 01:45:11,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 01:45:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:45:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2020-10-27 01:45:11,501 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 16 [2020-10-27 01:45:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:11,502 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2020-10-27 01:45:11,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:45:11,502 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2020-10-27 01:45:11,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:45:11,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:11,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:11,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:45:11,504 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:11,505 INFO L82 PathProgramCache]: Analyzing trace with hash 51209556, now seen corresponding path program 1 times [2020-10-27 01:45:11,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:11,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055511098] [2020-10-27 01:45:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:11,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:11,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:11,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:11,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:45:11,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:11,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-27 01:45:11,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:11,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:45:11,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:11,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:45:11,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:45:12,164 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2020-10-27 01:45:12,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:12,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:12,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:12,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:12,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:12,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 01:45:12,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:12,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:12,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:12,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:12,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:45:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:12,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055511098] [2020-10-27 01:45:12,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:12,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:45:12,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849299575] [2020-10-27 01:45:12,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:45:12,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:12,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:45:12,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:45:12,370 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 8 states. [2020-10-27 01:45:12,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:12,797 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2020-10-27 01:45:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:45:12,798 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-27 01:45:12,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:12,800 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:45:12,801 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:45:12,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:12,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:45:12,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2020-10-27 01:45:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:45:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-10-27 01:45:12,811 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 17 [2020-10-27 01:45:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:12,812 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-10-27 01:45:12,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:45:12,812 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-10-27 01:45:12,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:45:12,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:12,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:12,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:45:12,813 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:12,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:12,814 INFO L82 PathProgramCache]: Analyzing trace with hash 589216965, now seen corresponding path program 1 times [2020-10-27 01:45:12,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:12,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231187513] [2020-10-27 01:45:12,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:12,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:12,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:12,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:12,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:13,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:13,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:45:13,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:45:13,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-27 01:45:13,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:45:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:45:13,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:13,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:13,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:13,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:13,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:13,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:13,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:45:13,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:13,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:13,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:13,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:13,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:45:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:13,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231187513] [2020-10-27 01:45:13,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:45:13,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:45:13,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406281631] [2020-10-27 01:45:13,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:45:13,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:13,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:45:13,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:45:13,351 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 4 states. [2020-10-27 01:45:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:13,447 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-10-27 01:45:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:45:13,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 01:45:13,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:13,449 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:45:13,449 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:45:13,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:45:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:45:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 01:45:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:45:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-10-27 01:45:13,459 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2020-10-27 01:45:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:13,459 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-10-27 01:45:13,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:45:13,460 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-10-27 01:45:13,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:45:13,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:13,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:13,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:45:13,461 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:13,462 INFO L82 PathProgramCache]: Analyzing trace with hash -510729189, now seen corresponding path program 1 times [2020-10-27 01:45:13,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:13,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350669761] [2020-10-27 01:45:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:13,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:13,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:13,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:13,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:45:13,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:13,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 01:45:13,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:13,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:45:13,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:13,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:45:13,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:13,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:13,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:13,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:13,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:13,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:13,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:13,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:13,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:13,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:13,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:13,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:13,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350669761] [2020-10-27 01:45:13,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:45:13,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:45:13,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703031685] [2020-10-27 01:45:13,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:45:13,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:13,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:45:13,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:45:13,638 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2020-10-27 01:45:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:13,773 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-10-27 01:45:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:45:13,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-27 01:45:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:13,775 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:45:13,775 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 01:45:13,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:45:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 01:45:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 01:45:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:45:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-10-27 01:45:13,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 18 [2020-10-27 01:45:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:13,783 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-10-27 01:45:13,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:45:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-10-27 01:45:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:45:13,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:13,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:13,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:45:13,784 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:13,785 INFO L82 PathProgramCache]: Analyzing trace with hash -49128531, now seen corresponding path program 1 times [2020-10-27 01:45:13,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:13,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89320850] [2020-10-27 01:45:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:13,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:13,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:13,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:13,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:45:13,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:13,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 01:45:13,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:13,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:45:13,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:13,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:45:13,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:13,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:14,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:14,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:14,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:14,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:14,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:45:14,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:14,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:14,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:14,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89320850] [2020-10-27 01:45:14,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:14,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:45:14,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148596289] [2020-10-27 01:45:14,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:45:14,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:14,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:45:14,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:45:14,023 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 6 states. [2020-10-27 01:45:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:14,317 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2020-10-27 01:45:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:45:14,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:45:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:14,320 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:45:14,320 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:45:14,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:45:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:45:14,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-10-27 01:45:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:45:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-10-27 01:45:14,339 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2020-10-27 01:45:14,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:14,340 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-10-27 01:45:14,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:45:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-10-27 01:45:14,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:45:14,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:14,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:14,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:45:14,343 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:14,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1713404324, now seen corresponding path program 1 times [2020-10-27 01:45:14,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:14,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628919080] [2020-10-27 01:45:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:14,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:14,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:14,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:14,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:45:14,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:14,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-27 01:45:14,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:14,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:45:14,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:45:14,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:45:14,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:14,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:14,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:14,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:14,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:14,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:14,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:45:14,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:14,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:14,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:14,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:14,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:14,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628919080] [2020-10-27 01:45:14,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:14,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:45:14,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593542798] [2020-10-27 01:45:14,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:45:14,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:14,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:45:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:45:14,644 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2020-10-27 01:45:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:14,824 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2020-10-27 01:45:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:45:14,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 01:45:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:14,826 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:45:14,826 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:45:14,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:45:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:45:14,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-10-27 01:45:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:45:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-10-27 01:45:14,840 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2020-10-27 01:45:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:14,840 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-10-27 01:45:14,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:45:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-10-27 01:45:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:45:14,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:14,841 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:14,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:45:14,842 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:14,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:14,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1636997573, now seen corresponding path program 2 times [2020-10-27 01:45:14,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:14,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26546768] [2020-10-27 01:45:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:14,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:14,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:15,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:15,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:15,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:45:15,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:15,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-27 01:45:15,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:15,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:45:15,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:15,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:45:15,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:15,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:15,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:15,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:15,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:15,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:15,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:45:15,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:15,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:15,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:15,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:15,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:15,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26546768] [2020-10-27 01:45:15,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:15,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:45:15,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040360697] [2020-10-27 01:45:15,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:45:15,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:15,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:45:15,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:45:15,299 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 7 states. [2020-10-27 01:45:15,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:15,644 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2020-10-27 01:45:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:45:15,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 01:45:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:15,647 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:45:15,647 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:45:15,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:45:15,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-27 01:45:15,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:45:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-10-27 01:45:15,676 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 19 [2020-10-27 01:45:15,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:15,677 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-10-27 01:45:15,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:45:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-10-27 01:45:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:45:15,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:15,678 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] [2020-10-27 01:45:15,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:45:15,679 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:15,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:15,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1649703957, now seen corresponding path program 1 times [2020-10-27 01:45:15,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:15,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829464847] [2020-10-27 01:45:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:15,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:15,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:15,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:16,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:17,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:17,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:45:17,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:45:17,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1510 [2020-10-27 01:45:17,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:17,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:45:17,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:17,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:45:17,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:17,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:17,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:17,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:17,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:17,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:17,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:17,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:17,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:17,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:17,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:17,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:17,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829464847] [2020-10-27 01:45:17,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:17,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:45:17,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973735557] [2020-10-27 01:45:17,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:45:17,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:17,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:45:17,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:45:17,498 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 10 states. [2020-10-27 01:45:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:18,072 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-10-27 01:45:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:45:18,074 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-27 01:45:18,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:18,075 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:45:18,076 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:45:18,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:45:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:45:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-27 01:45:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:45:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 56 transitions. [2020-10-27 01:45:18,091 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 56 transitions. Word has length 20 [2020-10-27 01:45:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:18,091 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 56 transitions. [2020-10-27 01:45:18,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:45:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 56 transitions. [2020-10-27 01:45:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:45:18,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:18,092 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:18,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:45:18,093 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:18,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:18,094 INFO L82 PathProgramCache]: Analyzing trace with hash 517347981, now seen corresponding path program 2 times [2020-10-27 01:45:18,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:18,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102191001] [2020-10-27 01:45:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:18,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:18,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:18,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:18,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:18,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:45:18,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:18,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 805 [2020-10-27 01:45:18,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:18,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:45:18,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:18,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:45:18,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:19,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:19,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:19,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:19,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:19,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:19,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:19,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:19,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:19,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:19,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:19,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:19,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102191001] [2020-10-27 01:45:19,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:19,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:45:19,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552500409] [2020-10-27 01:45:19,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:45:19,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:19,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:45:19,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:45:19,050 INFO L87 Difference]: Start difference. First operand 43 states and 56 transitions. Second operand 7 states. [2020-10-27 01:45:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:19,480 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-27 01:45:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:45:19,481 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 01:45:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:19,482 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:45:19,482 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:45:19,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:45:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-27 01:45:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:45:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-27 01:45:19,506 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 20 [2020-10-27 01:45:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:19,509 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-27 01:45:19,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:45:19,509 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-27 01:45:19,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:45:19,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:19,515 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:19,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:45:19,516 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:19,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1927668051, now seen corresponding path program 3 times [2020-10-27 01:45:19,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:19,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265472438] [2020-10-27 01:45:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:19,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:19,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:19,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:19,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:19,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:45:19,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:19,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-27 01:45:19,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:19,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:45:19,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:19,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:45:19,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:20,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:20,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:20,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:20,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:20,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:20,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:45:20,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:20,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:20,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:20,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:20,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:45:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:20,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265472438] [2020-10-27 01:45:20,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:20,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:45:20,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294248292] [2020-10-27 01:45:20,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:45:20,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:20,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:45:20,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:45:20,098 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 8 states. [2020-10-27 01:45:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:20,475 INFO L93 Difference]: Finished difference Result 86 states and 122 transitions. [2020-10-27 01:45:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:45:20,475 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 01:45:20,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:20,476 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:45:20,476 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 01:45:20,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 01:45:20,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2020-10-27 01:45:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:45:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2020-10-27 01:45:20,492 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 20 [2020-10-27 01:45:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:20,492 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2020-10-27 01:45:20,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:45:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2020-10-27 01:45:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:45:20,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:20,493 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:20,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:45:20,493 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:20,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1468121732, now seen corresponding path program 2 times [2020-10-27 01:45:20,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:20,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239054692] [2020-10-27 01:45:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:20,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:20,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:20,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:21,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:21,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:45:21,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:21,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-27 01:45:21,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:21,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:45:21,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:21,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:45:21,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:21,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:21,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:21,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:21,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:21,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:21,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:21,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:21,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:21,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:21,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:21,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239054692] [2020-10-27 01:45:21,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:21,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:45:21,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117051068] [2020-10-27 01:45:21,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:45:21,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:21,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:45:21,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:45:21,614 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand 12 states. [2020-10-27 01:45:22,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:22,380 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2020-10-27 01:45:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:45:22,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-27 01:45:22,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:22,382 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:45:22,382 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:45:22,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:45:22,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:45:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-27 01:45:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:45:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2020-10-27 01:45:22,397 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 21 [2020-10-27 01:45:22,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:22,397 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2020-10-27 01:45:22,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:45:22,398 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2020-10-27 01:45:22,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:45:22,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:22,399 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:22,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:45:22,399 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:22,400 INFO L82 PathProgramCache]: Analyzing trace with hash -763152699, now seen corresponding path program 4 times [2020-10-27 01:45:22,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:22,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962714983] [2020-10-27 01:45:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:22,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:22,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:22,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:22,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:22,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:45:22,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:22,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-27 01:45:22,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:22,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:45:22,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:22,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:45:22,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:22,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:22,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:22,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:22,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:22,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:22,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:22,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:22,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:22,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962714983] [2020-10-27 01:45:22,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:22,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:45:22,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093505039] [2020-10-27 01:45:22,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:45:22,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:22,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:45:22,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:45:22,946 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand 9 states. [2020-10-27 01:45:23,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:23,476 INFO L93 Difference]: Finished difference Result 88 states and 122 transitions. [2020-10-27 01:45:23,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:45:23,476 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-27 01:45:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:23,477 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:45:23,477 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:45:23,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:45:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:45:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2020-10-27 01:45:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:45:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2020-10-27 01:45:23,493 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 21 [2020-10-27 01:45:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:23,493 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2020-10-27 01:45:23,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:45:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2020-10-27 01:45:23,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:45:23,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:23,494 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:23,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:45:23,494 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:23,495 INFO L82 PathProgramCache]: Analyzing trace with hash -663529717, now seen corresponding path program 3 times [2020-10-27 01:45:23,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:23,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682362308] [2020-10-27 01:45:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:23,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:23,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:23,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:23,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:23,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:45:23,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:23,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-27 01:45:23,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:45:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:23,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:45:23,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:24,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:24,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:24,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:24,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:24,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:24,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:45:24,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:24,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:24,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:24,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:24,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:24,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682362308] [2020-10-27 01:45:24,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:24,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:45:24,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422606637] [2020-10-27 01:45:24,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:45:24,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:45:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:24,505 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand 13 states. [2020-10-27 01:45:25,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:25,585 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-27 01:45:25,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:45:25,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-27 01:45:25,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:25,587 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:45:25,587 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:45:25,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:45:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:45:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 01:45:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:45:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-10-27 01:45:25,601 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 22 [2020-10-27 01:45:25,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:25,601 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-27 01:45:25,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:45:25,601 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2020-10-27 01:45:25,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:45:25,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:25,602 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:25,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:45:25,603 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:25,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:25,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1588247525, now seen corresponding path program 4 times [2020-10-27 01:45:25,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:25,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597962679] [2020-10-27 01:45:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:25,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:25,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:25,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:25,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:45:25,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:25,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-27 01:45:25,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:45:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:45:25,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:26,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:26,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:26,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:26,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:26,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:26,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:45:26,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:26,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:26,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:26,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:26,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:45:26,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597962679] [2020-10-27 01:45:26,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:26,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:45:26,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380602998] [2020-10-27 01:45:26,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:45:26,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:26,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:45:26,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:45:26,093 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand 8 states. [2020-10-27 01:45:26,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:26,505 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2020-10-27 01:45:26,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:45:26,506 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 01:45:26,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:26,507 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:45:26,507 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:45:26,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:45:26,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:45:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2020-10-27 01:45:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:45:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2020-10-27 01:45:26,524 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 22 [2020-10-27 01:45:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:26,524 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-10-27 01:45:26,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:45:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2020-10-27 01:45:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:45:26,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:26,526 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:26,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:45:26,526 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:26,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2089467269, now seen corresponding path program 3 times [2020-10-27 01:45:26,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:26,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380590220] [2020-10-27 01:45:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:26,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:26,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:26,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:26,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:45:26,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:26,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-27 01:45:26,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:45:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:45:26,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:45:26,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:26,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:26,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:26,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:26,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:26,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:26,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:26,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:26,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:26,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:26,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:26,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:45:26,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380590220] [2020-10-27 01:45:26,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:26,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:45:26,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892792140] [2020-10-27 01:45:26,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:45:26,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:26,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:45:26,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:45:26,852 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 6 states. [2020-10-27 01:45:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:27,181 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-10-27 01:45:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:45:27,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 01:45:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:27,184 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:45:27,184 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 01:45:27,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:45:27,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 01:45:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2020-10-27 01:45:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:45:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2020-10-27 01:45:27,203 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 22 [2020-10-27 01:45:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:27,204 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2020-10-27 01:45:27,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:45:27,204 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2020-10-27 01:45:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:45:27,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:27,204 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:27,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:45:27,205 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1462683795, now seen corresponding path program 5 times [2020-10-27 01:45:27,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:27,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63968916] [2020-10-27 01:45:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:27,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:27,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:27,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:27,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:45:27,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:27,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-27 01:45:27,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:45:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:45:27,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:27,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:27,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:27,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:27,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:27,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:27,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:27,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:27,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:27,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:27,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:27,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:45:27,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63968916] [2020-10-27 01:45:27,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:27,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:45:27,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741265187] [2020-10-27 01:45:27,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:45:27,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:27,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:45:27,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:45:27,522 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand 8 states. [2020-10-27 01:45:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:27,922 INFO L93 Difference]: Finished difference Result 91 states and 116 transitions. [2020-10-27 01:45:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:45:27,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 01:45:27,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:27,924 INFO L225 Difference]: With dead ends: 91 [2020-10-27 01:45:27,924 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 01:45:27,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:45:27,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 01:45:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2020-10-27 01:45:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:45:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2020-10-27 01:45:27,944 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 22 [2020-10-27 01:45:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:27,944 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2020-10-27 01:45:27,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:45:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2020-10-27 01:45:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:45:27,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:27,945 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:27,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:45:27,945 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:27,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:27,946 INFO L82 PathProgramCache]: Analyzing trace with hash 977084845, now seen corresponding path program 6 times [2020-10-27 01:45:27,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:27,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413470318] [2020-10-27 01:45:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:27,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:28,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:28,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:28,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:28,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:45:28,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:28,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-27 01:45:28,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:28,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:45:28,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:28,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:45:28,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:28,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:28,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:28,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:28,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:28,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:28,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:28,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:28,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:28,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:28,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:28,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:28,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413470318] [2020-10-27 01:45:28,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:28,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:45:28,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526052770] [2020-10-27 01:45:28,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:45:28,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:45:28,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:45:28,584 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand 10 states. [2020-10-27 01:45:29,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:29,204 INFO L93 Difference]: Finished difference Result 116 states and 169 transitions. [2020-10-27 01:45:29,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:45:29,205 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-27 01:45:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:29,206 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:45:29,206 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:45:29,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:45:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:45:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2020-10-27 01:45:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:45:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 107 transitions. [2020-10-27 01:45:29,229 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 107 transitions. Word has length 22 [2020-10-27 01:45:29,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:29,229 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 107 transitions. [2020-10-27 01:45:29,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:45:29,229 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 107 transitions. [2020-10-27 01:45:29,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:45:29,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:29,231 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:29,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:45:29,232 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:29,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:29,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1974752100, now seen corresponding path program 5 times [2020-10-27 01:45:29,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:29,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414040448] [2020-10-27 01:45:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:29,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:29,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:29,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:30,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:30,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:45:30,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:30,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 847 [2020-10-27 01:45:30,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:30,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:45:30,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:30,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:45:30,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:30,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:30,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:30,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:30,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:30,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:30,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:30,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:30,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:30,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:30,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:30,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:30,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414040448] [2020-10-27 01:45:30,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:30,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:45:30,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774288435] [2020-10-27 01:45:30,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:45:30,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:30,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:45:30,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:45:30,488 INFO L87 Difference]: Start difference. First operand 77 states and 107 transitions. Second operand 12 states. [2020-10-27 01:45:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:31,427 INFO L93 Difference]: Finished difference Result 91 states and 121 transitions. [2020-10-27 01:45:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:45:31,428 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-27 01:45:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:31,429 INFO L225 Difference]: With dead ends: 91 [2020-10-27 01:45:31,429 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:45:31,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:45:31,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:45:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2020-10-27 01:45:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:45:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 108 transitions. [2020-10-27 01:45:31,458 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 108 transitions. Word has length 23 [2020-10-27 01:45:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:31,459 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 108 transitions. [2020-10-27 01:45:31,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:45:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 108 transitions. [2020-10-27 01:45:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:45:31,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:31,460 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:31,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:45:31,461 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:31,461 INFO L82 PathProgramCache]: Analyzing trace with hash 720360948, now seen corresponding path program 6 times [2020-10-27 01:45:31,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:31,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436321265] [2020-10-27 01:45:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:31,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:31,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:31,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:31,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:45:31,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:45:31,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-27 01:45:31,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:45:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:45:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:45:31,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:31,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:31,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:31,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:31,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:31,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:31,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:31,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:31,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:31,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:31,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:31,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:45:31,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436321265] [2020-10-27 01:45:31,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:31,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:45:31,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199520089] [2020-10-27 01:45:31,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:45:31,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:31,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:45:31,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:45:31,738 INFO L87 Difference]: Start difference. First operand 78 states and 108 transitions. Second operand 6 states. [2020-10-27 01:45:32,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:32,134 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2020-10-27 01:45:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:45:32,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 01:45:32,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:32,136 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:45:32,136 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:45:32,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:32,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:45:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2020-10-27 01:45:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:45:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2020-10-27 01:45:32,158 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 23 [2020-10-27 01:45:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:32,158 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2020-10-27 01:45:32,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:45:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2020-10-27 01:45:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:45:32,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:32,160 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:32,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:45:32,160 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:32,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash 219141204, now seen corresponding path program 4 times [2020-10-27 01:45:32,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:32,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877747797] [2020-10-27 01:45:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:32,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:32,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:32,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:33,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:33,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:45:33,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:33,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1302 [2020-10-27 01:45:33,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:33,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:45:33,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:33,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:45:33,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:33,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:33,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:33,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:33,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:33,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:33,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:45:33,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:33,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:33,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:33,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:33,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:45:33,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877747797] [2020-10-27 01:45:33,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:33,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:45:33,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127134533] [2020-10-27 01:45:33,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:45:33,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:33,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:45:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:45:33,628 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand 9 states. [2020-10-27 01:45:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:34,370 INFO L93 Difference]: Finished difference Result 118 states and 154 transitions. [2020-10-27 01:45:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:45:34,370 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 01:45:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:34,371 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:45:34,371 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:45:34,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:45:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:45:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 94. [2020-10-27 01:45:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:45:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2020-10-27 01:45:34,392 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 23 [2020-10-27 01:45:34,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:34,392 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2020-10-27 01:45:34,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:45:34,392 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2020-10-27 01:45:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:45:34,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:34,393 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:34,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:45:34,393 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:34,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:34,393 INFO L82 PathProgramCache]: Analyzing trace with hash -910126139, now seen corresponding path program 7 times [2020-10-27 01:45:34,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:34,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627057923] [2020-10-27 01:45:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:34,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:34,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:34,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:34,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:34,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:45:34,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:34,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-27 01:45:34,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:34,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:45:34,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:34,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:45:34,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:35,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:35,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:35,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:35,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:35,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:35,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:35,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:35,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:35,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:35,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:35,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:45:35,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627057923] [2020-10-27 01:45:35,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:35,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:45:35,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904177429] [2020-10-27 01:45:35,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:45:35,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:35,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:45:35,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:35,103 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand 11 states. [2020-10-27 01:45:35,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:35,883 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2020-10-27 01:45:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:45:35,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-27 01:45:35,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:35,884 INFO L225 Difference]: With dead ends: 147 [2020-10-27 01:45:35,885 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 01:45:35,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:45:35,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 01:45:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 94. [2020-10-27 01:45:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:45:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2020-10-27 01:45:35,903 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 23 [2020-10-27 01:45:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:35,904 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2020-10-27 01:45:35,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:45:35,904 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2020-10-27 01:45:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:45:35,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:35,905 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:35,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:45:35,905 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:35,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2137857493, now seen corresponding path program 7 times [2020-10-27 01:45:35,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:35,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177815890] [2020-10-27 01:45:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:35,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:35,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:36,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:36,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:36,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:45:36,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:45:36,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 820 [2020-10-27 01:45:36,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:36,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:45:36,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:36,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:45:36,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:37,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:37,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:37,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:37,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:37,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:37,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:37,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:37,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:37,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:37,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:37,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:45:37,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177815890] [2020-10-27 01:45:37,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:37,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:45:37,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571234950] [2020-10-27 01:45:37,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:45:37,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:37,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:45:37,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:45:37,059 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand 11 states. [2020-10-27 01:45:38,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:38,011 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2020-10-27 01:45:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:45:38,016 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-27 01:45:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:38,017 INFO L225 Difference]: With dead ends: 117 [2020-10-27 01:45:38,017 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:45:38,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:45:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:45:38,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2020-10-27 01:45:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 01:45:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 115 transitions. [2020-10-27 01:45:38,037 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 115 transitions. Word has length 24 [2020-10-27 01:45:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:38,037 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 115 transitions. [2020-10-27 01:45:38,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:45:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 115 transitions. [2020-10-27 01:45:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:45:38,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:38,038 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:38,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:45:38,038 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:38,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:38,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1925689755, now seen corresponding path program 8 times [2020-10-27 01:45:38,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:38,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717423772] [2020-10-27 01:45:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:38,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:38,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:38,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:38,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:38,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:38,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:45:38,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:45:38,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-27 01:45:38,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:38,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:45:38,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:38,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:45:38,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:43,604 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-10-27 01:45:43,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:43,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:43,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:43,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:43,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:43,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:45:43,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:43,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:43,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:45:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:45:43,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717423772] [2020-10-27 01:45:43,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:43,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:45:43,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113100751] [2020-10-27 01:45:43,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:45:43,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:43,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:45:43,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=153, Unknown=1, NotChecked=0, Total=182 [2020-10-27 01:45:43,966 INFO L87 Difference]: Start difference. First operand 86 states and 115 transitions. Second operand 14 states. [2020-10-27 01:45:52,844 WARN L193 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-27 01:46:00,512 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 01:46:00,714 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 01:46:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:00,871 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2020-10-27 01:46:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:46:00,871 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-27 01:46:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:00,872 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:46:00,872 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 01:46:00,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=99, Invalid=550, Unknown=1, NotChecked=0, Total=650 [2020-10-27 01:46:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 01:46:00,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-27 01:46:00,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:46:00,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2020-10-27 01:46:00,891 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 24 [2020-10-27 01:46:00,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:00,891 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2020-10-27 01:46:00,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:46:00,891 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2020-10-27 01:46:00,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:46:00,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:00,892 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:00,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:46:00,892 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:00,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:00,893 INFO L82 PathProgramCache]: Analyzing trace with hash 202665963, now seen corresponding path program 9 times [2020-10-27 01:46:00,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:00,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147131904] [2020-10-27 01:46:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:00,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:00,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:01,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:01,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:46:01,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:01,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-27 01:46:01,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:01,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:46:01,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:01,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:46:01,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:01,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:01,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:01,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:01,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:01,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:01,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:01,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:01,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:46:01,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147131904] [2020-10-27 01:46:01,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:01,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:46:01,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313019200] [2020-10-27 01:46:01,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:46:01,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:01,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:46:01,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:46:01,443 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand 9 states. [2020-10-27 01:46:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:02,000 INFO L93 Difference]: Finished difference Result 122 states and 155 transitions. [2020-10-27 01:46:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:46:02,001 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:46:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:02,002 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:46:02,002 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:46:02,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:46:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:46:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2020-10-27 01:46:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:46:02,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2020-10-27 01:46:02,020 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 24 [2020-10-27 01:46:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:02,020 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2020-10-27 01:46:02,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:46:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2020-10-27 01:46:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:46:02,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:02,021 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:02,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:46:02,021 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:02,022 INFO L82 PathProgramCache]: Analyzing trace with hash 715875501, now seen corresponding path program 8 times [2020-10-27 01:46:02,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:02,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522742113] [2020-10-27 01:46:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:02,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:02,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:02,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:02,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:02,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:46:02,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:02,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 578 [2020-10-27 01:46:02,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:02,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:46:02,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:02,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:46:02,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:02,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:02,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:02,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:02,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:02,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:02,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:02,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:02,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:46:02,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522742113] [2020-10-27 01:46:02,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:02,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:46:02,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001458340] [2020-10-27 01:46:02,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:46:02,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:02,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:46:02,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:46:02,815 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand 12 states. [2020-10-27 01:46:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:03,833 INFO L93 Difference]: Finished difference Result 157 states and 228 transitions. [2020-10-27 01:46:03,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:46:03,836 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-27 01:46:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:03,837 INFO L225 Difference]: With dead ends: 157 [2020-10-27 01:46:03,837 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:46:03,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:46:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:46:03,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-10-27 01:46:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 01:46:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2020-10-27 01:46:03,857 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 24 [2020-10-27 01:46:03,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:03,857 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2020-10-27 01:46:03,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:46:03,857 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2020-10-27 01:46:03,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:46:03,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:03,858 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:03,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:46:03,858 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:03,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:03,859 INFO L82 PathProgramCache]: Analyzing trace with hash 636177108, now seen corresponding path program 10 times [2020-10-27 01:46:03,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:03,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909779196] [2020-10-27 01:46:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:03,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:03,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:04,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:04,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:04,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:46:04,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:04,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 888 [2020-10-27 01:46:04,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:04,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:46:04,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:04,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:46:04,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:05,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:05,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:05,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:05,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:05,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:05,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:05,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909779196] [2020-10-27 01:46:05,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:05,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:46:05,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378131865] [2020-10-27 01:46:05,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:46:05,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:05,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:46:05,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:46:05,240 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand 13 states. [2020-10-27 01:46:05,923 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-27 01:46:06,083 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-27 01:46:06,264 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-27 01:46:06,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:06,525 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2020-10-27 01:46:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:46:06,526 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-27 01:46:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:06,528 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:46:06,528 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:46:06,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:46:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:46:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-10-27 01:46:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 01:46:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 132 transitions. [2020-10-27 01:46:06,544 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 132 transitions. Word has length 25 [2020-10-27 01:46:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:06,544 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 132 transitions. [2020-10-27 01:46:06,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:46:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 132 transitions. [2020-10-27 01:46:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:46:06,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:06,545 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:06,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:46:06,545 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:06,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:06,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1322769724, now seen corresponding path program 5 times [2020-10-27 01:46:06,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:06,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57845702] [2020-10-27 01:46:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:06,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:06,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:06,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:06,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:46:06,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:06,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-27 01:46:06,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:06,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:46:06,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:46:06,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:46:06,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:06,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:06,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:06,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:06,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:06,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:06,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:06,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:06,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:06,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:06,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:06,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:46:06,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57845702] [2020-10-27 01:46:06,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:06,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:46:06,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868304787] [2020-10-27 01:46:06,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:46:06,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:06,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:46:06,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:06,923 INFO L87 Difference]: Start difference. First operand 100 states and 132 transitions. Second operand 7 states. [2020-10-27 01:46:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:07,572 INFO L93 Difference]: Finished difference Result 131 states and 174 transitions. [2020-10-27 01:46:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:46:07,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 01:46:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:07,574 INFO L225 Difference]: With dead ends: 131 [2020-10-27 01:46:07,574 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 01:46:07,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:46:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 01:46:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2020-10-27 01:46:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:46:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 144 transitions. [2020-10-27 01:46:07,593 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 144 transitions. Word has length 25 [2020-10-27 01:46:07,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:07,593 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 144 transitions. [2020-10-27 01:46:07,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:46:07,593 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 144 transitions. [2020-10-27 01:46:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:46:07,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:07,594 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:07,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:46:07,594 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:07,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:07,595 INFO L82 PathProgramCache]: Analyzing trace with hash -417681211, now seen corresponding path program 9 times [2020-10-27 01:46:07,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:07,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715346559] [2020-10-27 01:46:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:07,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:07,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:07,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:08,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:08,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:46:08,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:08,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-27 01:46:08,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:08,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:46:08,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:08,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:46:08,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:08,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:08,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:08,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:08,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:08,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:08,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:08,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:08,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:08,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:08,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:08,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:08,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715346559] [2020-10-27 01:46:08,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:08,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:46:08,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285908679] [2020-10-27 01:46:08,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:46:08,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:08,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:46:08,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:46:08,449 INFO L87 Difference]: Start difference. First operand 106 states and 144 transitions. Second operand 13 states. [2020-10-27 01:46:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:09,678 INFO L93 Difference]: Finished difference Result 200 states and 304 transitions. [2020-10-27 01:46:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:46:09,679 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-27 01:46:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:09,681 INFO L225 Difference]: With dead ends: 200 [2020-10-27 01:46:09,681 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 01:46:09,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:46:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 01:46:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 129. [2020-10-27 01:46:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:46:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2020-10-27 01:46:09,721 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 25 [2020-10-27 01:46:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:09,721 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2020-10-27 01:46:09,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:46:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2020-10-27 01:46:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:46:09,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:09,724 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:09,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:46:09,724 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:09,725 INFO L82 PathProgramCache]: Analyzing trace with hash -684009285, now seen corresponding path program 11 times [2020-10-27 01:46:09,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:09,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937583175] [2020-10-27 01:46:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:09,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:09,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:10,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:10,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:10,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:46:10,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:10,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-27 01:46:10,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:46:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:46:10,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:13,070 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-10-27 01:46:19,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:19,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:19,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:19,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:19,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:19,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:19,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:19,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:19,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:19,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:19,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 2 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:46:19,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937583175] [2020-10-27 01:46:19,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:19,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:46:19,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443409691] [2020-10-27 01:46:19,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:46:19,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:19,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:46:19,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=148, Unknown=3, NotChecked=0, Total=182 [2020-10-27 01:46:19,727 INFO L87 Difference]: Start difference. First operand 129 states and 179 transitions. Second operand 14 states. [2020-10-27 01:46:22,560 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-27 01:46:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:25,297 INFO L93 Difference]: Finished difference Result 138 states and 188 transitions. [2020-10-27 01:46:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:46:25,298 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-27 01:46:25,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:25,299 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:46:25,299 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 01:46:25,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=93, Invalid=503, Unknown=4, NotChecked=0, Total=600 [2020-10-27 01:46:25,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 01:46:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-27 01:46:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:46:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 180 transitions. [2020-10-27 01:46:25,346 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 180 transitions. Word has length 26 [2020-10-27 01:46:25,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:25,347 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 180 transitions. [2020-10-27 01:46:25,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:46:25,347 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 180 transitions. [2020-10-27 01:46:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:46:25,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:25,348 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:25,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:46:25,348 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:25,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1484701933, now seen corresponding path program 12 times [2020-10-27 01:46:25,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:25,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420693245] [2020-10-27 01:46:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:25,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:25,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:46:25,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:25,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-27 01:46:25,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:25,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:46:25,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:25,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:46:25,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:26,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:26,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:26,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:26,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:26,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:26,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:26,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:26,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:26,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:26,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:26,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:46:26,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420693245] [2020-10-27 01:46:26,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:26,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:46:26,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848901021] [2020-10-27 01:46:26,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:46:26,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:26,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:46:26,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:46:26,086 INFO L87 Difference]: Start difference. First operand 130 states and 180 transitions. Second operand 10 states. [2020-10-27 01:46:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:26,799 INFO L93 Difference]: Finished difference Result 161 states and 215 transitions. [2020-10-27 01:46:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:46:26,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:46:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:26,801 INFO L225 Difference]: With dead ends: 161 [2020-10-27 01:46:26,802 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 01:46:26,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:46:26,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 01:46:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 130. [2020-10-27 01:46:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:46:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2020-10-27 01:46:26,828 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 26 [2020-10-27 01:46:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:26,828 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2020-10-27 01:46:26,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:46:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2020-10-27 01:46:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:46:26,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:26,830 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:26,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:46:26,830 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:26,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:26,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1281818933, now seen corresponding path program 13 times [2020-10-27 01:46:26,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:26,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417221882] [2020-10-27 01:46:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:26,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:26,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:27,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:27,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:46:27,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:27,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-27 01:46:27,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:27,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:46:27,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:46:27,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:46:27,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:27,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:27,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:27,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:27,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:27,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:27,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:27,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:27,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:27,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:46:27,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417221882] [2020-10-27 01:46:27,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:27,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:46:27,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422304114] [2020-10-27 01:46:27,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:46:27,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:27,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:46:27,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:27,274 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand 7 states. [2020-10-27 01:46:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:27,968 INFO L93 Difference]: Finished difference Result 155 states and 207 transitions. [2020-10-27 01:46:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:46:27,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-27 01:46:27,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:27,970 INFO L225 Difference]: With dead ends: 155 [2020-10-27 01:46:27,971 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 01:46:27,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:46:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 01:46:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 130. [2020-10-27 01:46:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:46:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2020-10-27 01:46:27,999 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 26 [2020-10-27 01:46:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:27,999 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2020-10-27 01:46:27,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:46:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2020-10-27 01:46:28,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:46:28,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:28,001 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:28,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:46:28,001 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:28,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:28,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1399885101, now seen corresponding path program 6 times [2020-10-27 01:46:28,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:28,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005116841] [2020-10-27 01:46:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:28,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:28,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:28,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:29,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:29,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:46:29,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:29,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1566 [2020-10-27 01:46:29,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:29,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:46:29,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:29,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:46:29,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:29,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:29,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:29,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:29,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:29,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:29,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:29,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:29,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:46:29,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005116841] [2020-10-27 01:46:29,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:29,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:46:29,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267555346] [2020-10-27 01:46:29,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:46:29,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:29,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:46:29,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:46:29,777 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand 11 states. [2020-10-27 01:46:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:31,060 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2020-10-27 01:46:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:46:31,061 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 01:46:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:31,062 INFO L225 Difference]: With dead ends: 157 [2020-10-27 01:46:31,063 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 01:46:31,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:46:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 01:46:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 129. [2020-10-27 01:46:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:46:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 176 transitions. [2020-10-27 01:46:31,085 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 176 transitions. Word has length 26 [2020-10-27 01:46:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:31,085 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 176 transitions. [2020-10-27 01:46:31,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:46:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 176 transitions. [2020-10-27 01:46:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:46:31,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:31,086 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:31,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:46:31,086 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:31,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1774855195, now seen corresponding path program 14 times [2020-10-27 01:46:31,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:31,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689697592] [2020-10-27 01:46:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:31,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:31,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:46:31,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:31,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-27 01:46:31,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:31,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:46:31,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:31,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:46:31,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:31,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:31,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:31,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:31,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:31,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:31,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:31,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:31,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:31,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:31,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 01:46:31,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689697592] [2020-10-27 01:46:31,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:31,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:46:31,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258525697] [2020-10-27 01:46:31,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:46:31,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:46:31,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:46:31,571 INFO L87 Difference]: Start difference. First operand 129 states and 176 transitions. Second operand 10 states. [2020-10-27 01:46:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:32,296 INFO L93 Difference]: Finished difference Result 166 states and 218 transitions. [2020-10-27 01:46:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:46:32,297 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:46:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:32,298 INFO L225 Difference]: With dead ends: 166 [2020-10-27 01:46:32,298 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 01:46:32,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:46:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 01:46:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-27 01:46:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:46:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 175 transitions. [2020-10-27 01:46:32,330 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 175 transitions. Word has length 26 [2020-10-27 01:46:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:32,330 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 175 transitions. [2020-10-27 01:46:32,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:46:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 175 transitions. [2020-10-27 01:46:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:46:32,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:32,332 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:32,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:46:32,332 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:32,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1091478317, now seen corresponding path program 10 times [2020-10-27 01:46:32,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:32,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065009001] [2020-10-27 01:46:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:32,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:32,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:32,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:32,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:46:32,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:32,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-27 01:46:32,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:32,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:46:32,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:32,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:46:32,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:32,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:32,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:32,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:32,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:32,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:32,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:32,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:32,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:32,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:32,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:32,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:46:32,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065009001] [2020-10-27 01:46:32,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:32,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:46:32,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274268268] [2020-10-27 01:46:32,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:46:32,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:32,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:46:32,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:46:32,700 INFO L87 Difference]: Start difference. First operand 129 states and 175 transitions. Second operand 10 states. [2020-10-27 01:46:33,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:33,427 INFO L93 Difference]: Finished difference Result 179 states and 232 transitions. [2020-10-27 01:46:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:46:33,427 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:46:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:33,429 INFO L225 Difference]: With dead ends: 179 [2020-10-27 01:46:33,429 INFO L226 Difference]: Without dead ends: 164 [2020-10-27 01:46:33,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:46:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-27 01:46:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 129. [2020-10-27 01:46:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:46:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2020-10-27 01:46:33,456 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 26 [2020-10-27 01:46:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:33,456 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2020-10-27 01:46:33,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:46:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2020-10-27 01:46:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:46:33,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:33,457 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:33,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:46:33,457 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1198200915, now seen corresponding path program 11 times [2020-10-27 01:46:33,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:33,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693762309] [2020-10-27 01:46:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:33,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:33,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:33,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:33,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:33,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:46:33,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:33,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-27 01:46:33,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:46:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:46:33,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:34,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:34,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:34,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:34,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:34,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:34,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:34,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:34,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:34,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:34,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:34,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:46:34,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693762309] [2020-10-27 01:46:34,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:34,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:46:34,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153199783] [2020-10-27 01:46:34,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:46:34,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:34,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:46:34,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:46:34,273 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand 14 states. [2020-10-27 01:46:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:35,778 INFO L93 Difference]: Finished difference Result 197 states and 285 transitions. [2020-10-27 01:46:35,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:46:35,783 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-27 01:46:35,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:35,784 INFO L225 Difference]: With dead ends: 197 [2020-10-27 01:46:35,785 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 01:46:35,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:46:35,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 01:46:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 129. [2020-10-27 01:46:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:46:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 173 transitions. [2020-10-27 01:46:35,810 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 173 transitions. Word has length 26 [2020-10-27 01:46:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:35,810 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 173 transitions. [2020-10-27 01:46:35,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:46:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 173 transitions. [2020-10-27 01:46:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:46:35,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:35,811 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:35,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:46:35,812 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:35,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1339885492, now seen corresponding path program 15 times [2020-10-27 01:46:35,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:35,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144633810] [2020-10-27 01:46:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:35,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:35,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:36,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:36,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:36,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:46:36,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:36,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-27 01:46:36,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:36,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:46:36,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:36,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:46:36,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:39,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:39,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:39,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:39,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:39,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:39,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:39,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:39,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:39,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:39,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:39,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:46:39,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144633810] [2020-10-27 01:46:39,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:39,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:46:39,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842813480] [2020-10-27 01:46:39,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:46:39,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:39,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:46:39,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=176, Unknown=1, NotChecked=0, Total=210 [2020-10-27 01:46:39,078 INFO L87 Difference]: Start difference. First operand 129 states and 173 transitions. Second operand 15 states. [2020-10-27 01:46:39,403 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-27 01:46:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:40,807 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2020-10-27 01:46:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:46:40,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-27 01:46:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:40,809 INFO L225 Difference]: With dead ends: 144 [2020-10-27 01:46:40,809 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 01:46:40,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=138, Invalid=731, Unknown=1, NotChecked=0, Total=870 [2020-10-27 01:46:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 01:46:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-10-27 01:46:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:46:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 174 transitions. [2020-10-27 01:46:40,836 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 174 transitions. Word has length 27 [2020-10-27 01:46:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:40,836 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 174 transitions. [2020-10-27 01:46:40,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:46:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 174 transitions. [2020-10-27 01:46:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:46:40,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:40,837 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:40,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:46:40,837 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:40,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:40,838 INFO L82 PathProgramCache]: Analyzing trace with hash -12344412, now seen corresponding path program 16 times [2020-10-27 01:46:40,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:40,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967782207] [2020-10-27 01:46:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:40,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:40,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:41,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:41,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:46:41,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:41,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-27 01:46:41,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:41,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:46:41,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:46:41,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:46:41,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:41,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:41,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:41,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:41,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:41,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:41,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:41,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:41,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:41,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:41,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:41,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:46:41,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967782207] [2020-10-27 01:46:41,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:41,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:46:41,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630620703] [2020-10-27 01:46:41,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:46:41,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:41,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:46:41,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:41,283 INFO L87 Difference]: Start difference. First operand 130 states and 174 transitions. Second operand 7 states. [2020-10-27 01:46:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:42,019 INFO L93 Difference]: Finished difference Result 157 states and 204 transitions. [2020-10-27 01:46:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:46:42,020 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 01:46:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:42,021 INFO L225 Difference]: With dead ends: 157 [2020-10-27 01:46:42,021 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 01:46:42,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:46:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 01:46:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 143. [2020-10-27 01:46:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 01:46:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 189 transitions. [2020-10-27 01:46:42,048 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 189 transitions. Word has length 27 [2020-10-27 01:46:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:42,048 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 189 transitions. [2020-10-27 01:46:42,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:46:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 189 transitions. [2020-10-27 01:46:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:46:42,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:42,049 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:42,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:46:42,049 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:42,049 INFO L82 PathProgramCache]: Analyzing trace with hash 375492037, now seen corresponding path program 12 times [2020-10-27 01:46:42,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:42,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181701887] [2020-10-27 01:46:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:42,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:42,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:42,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:42,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:42,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:46:42,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:42,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-27 01:46:42,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:42,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:46:42,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:42,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:46:42,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:43,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:43,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:43,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:43,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:43,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:43,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:43,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:43,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:43,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:43,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:43,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:43,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181701887] [2020-10-27 01:46:43,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:43,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:46:43,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421456406] [2020-10-27 01:46:43,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:46:43,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:43,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:46:43,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:46:43,026 INFO L87 Difference]: Start difference. First operand 143 states and 189 transitions. Second operand 15 states. [2020-10-27 01:46:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:44,774 INFO L93 Difference]: Finished difference Result 270 states and 407 transitions. [2020-10-27 01:46:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:46:44,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-27 01:46:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:44,776 INFO L225 Difference]: With dead ends: 270 [2020-10-27 01:46:44,776 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 01:46:44,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:46:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 01:46:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 167. [2020-10-27 01:46:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:46:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2020-10-27 01:46:44,810 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 225 transitions. Word has length 27 [2020-10-27 01:46:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:44,810 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-10-27 01:46:44,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:46:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 225 transitions. [2020-10-27 01:46:44,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:46:44,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:44,811 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:44,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:46:44,811 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:44,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:44,812 INFO L82 PathProgramCache]: Analyzing trace with hash -343885861, now seen corresponding path program 17 times [2020-10-27 01:46:44,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:44,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949545464] [2020-10-27 01:46:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:44,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:44,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:45,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:45,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:45,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:46:45,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:45,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-10-27 01:46:45,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:45,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:46:45,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:45,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:46:45,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:50,762 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2020-10-27 01:46:51,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:51,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:51,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:51,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:51,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:51,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:51,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:51,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:51,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:51,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:51,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:46:51,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949545464] [2020-10-27 01:46:51,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:51,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:46:51,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900760766] [2020-10-27 01:46:51,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:46:51,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:51,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:46:51,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=261, Unknown=1, NotChecked=0, Total=306 [2020-10-27 01:46:51,267 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. Second operand 18 states. [2020-10-27 01:46:54,326 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-27 01:47:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:03,336 INFO L93 Difference]: Finished difference Result 177 states and 235 transitions. [2020-10-27 01:47:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:47:03,337 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-10-27 01:47:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:03,338 INFO L225 Difference]: With dead ends: 177 [2020-10-27 01:47:03,338 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 01:47:03,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=134, Invalid=920, Unknown=2, NotChecked=0, Total=1056 [2020-10-27 01:47:03,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 01:47:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2020-10-27 01:47:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 01:47:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 226 transitions. [2020-10-27 01:47:03,371 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 226 transitions. Word has length 28 [2020-10-27 01:47:03,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:03,371 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 226 transitions. [2020-10-27 01:47:03,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:47:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 226 transitions. [2020-10-27 01:47:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:47:03,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:03,372 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:03,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:47:03,372 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:03,372 INFO L82 PathProgramCache]: Analyzing trace with hash 686660075, now seen corresponding path program 18 times [2020-10-27 01:47:03,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:03,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230658845] [2020-10-27 01:47:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:03,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:03,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:03,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:03,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:04,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:04,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:47:04,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:47:04,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 966 [2020-10-27 01:47:04,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:47:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:47:04,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:05,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:05,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:05,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:05,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:05,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:05,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:05,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:05,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:05,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:05,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:05,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:47:05,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230658845] [2020-10-27 01:47:05,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:05,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:47:05,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799879083] [2020-10-27 01:47:05,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:47:05,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:05,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:47:05,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:47:05,231 INFO L87 Difference]: Start difference. First operand 168 states and 226 transitions. Second operand 17 states. [2020-10-27 01:47:06,770 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-27 01:47:07,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:07,022 INFO L93 Difference]: Finished difference Result 182 states and 240 transitions. [2020-10-27 01:47:07,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:47:07,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-27 01:47:07,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:07,025 INFO L225 Difference]: With dead ends: 182 [2020-10-27 01:47:07,026 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 01:47:07,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:47:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 01:47:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2020-10-27 01:47:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-27 01:47:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 230 transitions. [2020-10-27 01:47:07,053 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 230 transitions. Word has length 28 [2020-10-27 01:47:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:07,054 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 230 transitions. [2020-10-27 01:47:07,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:47:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 230 transitions. [2020-10-27 01:47:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:47:07,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:07,054 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:07,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:47:07,055 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:07,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1275624997, now seen corresponding path program 19 times [2020-10-27 01:47:07,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:07,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027052797] [2020-10-27 01:47:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:07,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:07,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:07,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:07,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:47:07,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:07,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-27 01:47:07,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:47:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:47:07,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:07,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:07,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:07,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:07,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:07,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:07,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:07,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:07,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:07,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:07,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:07,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 01:47:07,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027052797] [2020-10-27 01:47:07,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:07,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:47:07,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877039521] [2020-10-27 01:47:07,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:47:07,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:07,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:47:07,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:07,796 INFO L87 Difference]: Start difference. First operand 172 states and 230 transitions. Second operand 11 states. [2020-10-27 01:47:08,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:08,899 INFO L93 Difference]: Finished difference Result 214 states and 277 transitions. [2020-10-27 01:47:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:47:08,900 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-27 01:47:08,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:08,901 INFO L225 Difference]: With dead ends: 214 [2020-10-27 01:47:08,902 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 01:47:08,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:47:08,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 01:47:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 172. [2020-10-27 01:47:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-27 01:47:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 229 transitions. [2020-10-27 01:47:08,936 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 229 transitions. Word has length 28 [2020-10-27 01:47:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:08,936 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 229 transitions. [2020-10-27 01:47:08,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:47:08,937 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 229 transitions. [2020-10-27 01:47:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:47:08,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:08,938 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:08,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:47:08,939 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:08,939 INFO L82 PathProgramCache]: Analyzing trace with hash -701016613, now seen corresponding path program 7 times [2020-10-27 01:47:08,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:08,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719604519] [2020-10-27 01:47:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:08,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:08,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:09,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:47:09,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:09,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-27 01:47:09,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:09,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:47:09,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:09,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:47:09,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:09,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:09,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:09,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:09,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:09,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:09,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:09,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:09,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:09,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:09,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 01:47:09,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719604519] [2020-10-27 01:47:09,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:09,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:47:09,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959027335] [2020-10-27 01:47:09,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:47:09,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:09,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:47:09,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:47:09,570 INFO L87 Difference]: Start difference. First operand 172 states and 229 transitions. Second operand 8 states. [2020-10-27 01:47:09,958 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 01:47:10,089 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-27 01:47:10,324 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-27 01:47:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:10,854 INFO L93 Difference]: Finished difference Result 215 states and 287 transitions. [2020-10-27 01:47:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:47:10,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-27 01:47:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:10,856 INFO L225 Difference]: With dead ends: 215 [2020-10-27 01:47:10,857 INFO L226 Difference]: Without dead ends: 209 [2020-10-27 01:47:10,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-27 01:47:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 194. [2020-10-27 01:47:10,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-27 01:47:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 261 transitions. [2020-10-27 01:47:10,884 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 261 transitions. Word has length 28 [2020-10-27 01:47:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:10,884 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 261 transitions. [2020-10-27 01:47:10,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:47:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 261 transitions. [2020-10-27 01:47:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:47:10,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:10,885 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:10,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:47:10,885 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:10,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1293474795, now seen corresponding path program 20 times [2020-10-27 01:47:10,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:10,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969644058] [2020-10-27 01:47:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:10,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:10,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:11,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:11,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:47:11,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:11,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-27 01:47:11,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:11,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:47:11,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:11,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:47:11,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:11,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:11,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:11,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:11,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:11,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:11,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:47:11,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:11,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:11,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:11,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:11,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:47:11,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969644058] [2020-10-27 01:47:11,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:11,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:47:11,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206025780] [2020-10-27 01:47:11,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:47:11,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:11,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:47:11,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:11,552 INFO L87 Difference]: Start difference. First operand 194 states and 261 transitions. Second operand 11 states. [2020-10-27 01:47:12,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:12,467 INFO L93 Difference]: Finished difference Result 258 states and 332 transitions. [2020-10-27 01:47:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:47:12,467 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-27 01:47:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:12,469 INFO L225 Difference]: With dead ends: 258 [2020-10-27 01:47:12,469 INFO L226 Difference]: Without dead ends: 242 [2020-10-27 01:47:12,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:47:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-27 01:47:12,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 194. [2020-10-27 01:47:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-27 01:47:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 260 transitions. [2020-10-27 01:47:12,509 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 260 transitions. Word has length 28 [2020-10-27 01:47:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:12,511 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 260 transitions. [2020-10-27 01:47:12,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:47:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 260 transitions. [2020-10-27 01:47:12,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:47:12,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:12,513 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:12,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:47:12,513 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:12,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1915333293, now seen corresponding path program 13 times [2020-10-27 01:47:12,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:12,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845716654] [2020-10-27 01:47:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:12,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:13,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:13,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:47:13,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:47:13,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-27 01:47:13,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:13,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:47:13,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:13,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:47:13,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:13,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:13,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:13,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:13,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:13,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:13,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:13,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:13,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:13,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:13,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:13,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:13,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845716654] [2020-10-27 01:47:13,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:13,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:47:13,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106275558] [2020-10-27 01:47:13,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:47:13,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:13,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:47:13,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:13,674 INFO L87 Difference]: Start difference. First operand 194 states and 260 transitions. Second operand 16 states. [2020-10-27 01:47:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:15,739 INFO L93 Difference]: Finished difference Result 336 states and 503 transitions. [2020-10-27 01:47:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:47:15,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-10-27 01:47:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:15,741 INFO L225 Difference]: With dead ends: 336 [2020-10-27 01:47:15,741 INFO L226 Difference]: Without dead ends: 317 [2020-10-27 01:47:15,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:47:15,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-27 01:47:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 208. [2020-10-27 01:47:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 01:47:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 281 transitions. [2020-10-27 01:47:15,773 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 281 transitions. Word has length 28 [2020-10-27 01:47:15,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:15,774 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 281 transitions. [2020-10-27 01:47:15,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:47:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 281 transitions. [2020-10-27 01:47:15,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:47:15,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:15,774 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:15,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:47:15,775 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:15,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:15,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1001190252, now seen corresponding path program 21 times [2020-10-27 01:47:15,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:15,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695259763] [2020-10-27 01:47:15,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:15,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:15,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:15,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:16,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:16,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:47:16,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:47:16,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-27 01:47:16,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:16,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:47:16,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:47:16,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:19,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:19,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:19,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:19,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:19,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:19,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:19,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:19,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:47:19,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695259763] [2020-10-27 01:47:19,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:19,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:47:19,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860972421] [2020-10-27 01:47:19,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:47:19,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:19,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:47:19,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=231, Unknown=1, NotChecked=0, Total=272 [2020-10-27 01:47:19,472 INFO L87 Difference]: Start difference. First operand 208 states and 281 transitions. Second operand 17 states. [2020-10-27 01:47:54,608 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-27 01:47:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:57,393 INFO L93 Difference]: Finished difference Result 236 states and 309 transitions. [2020-10-27 01:47:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:47:57,393 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-10-27 01:47:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:57,395 INFO L225 Difference]: With dead ends: 236 [2020-10-27 01:47:57,395 INFO L226 Difference]: Without dead ends: 230 [2020-10-27 01:47:57,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=175, Invalid=1068, Unknown=17, NotChecked=0, Total=1260 [2020-10-27 01:47:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-27 01:47:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 209. [2020-10-27 01:47:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-27 01:47:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 282 transitions. [2020-10-27 01:47:57,434 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 282 transitions. Word has length 29 [2020-10-27 01:47:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:57,434 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 282 transitions. [2020-10-27 01:47:57,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:47:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 282 transitions. [2020-10-27 01:47:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:47:57,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:57,435 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:57,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:47:57,436 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:57,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:57,436 INFO L82 PathProgramCache]: Analyzing trace with hash 880962692, now seen corresponding path program 22 times [2020-10-27 01:47:57,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:57,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223068284] [2020-10-27 01:47:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:57,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:57,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:57,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:58,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:58,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:47:58,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:47:58,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 933 [2020-10-27 01:47:58,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:58,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:47:58,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:58,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:47:58,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:59,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:59,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:59,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:59,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:59,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:59,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:59,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:59,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:59,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:59,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:59,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:47:59,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223068284] [2020-10-27 01:47:59,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:59,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:47:59,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515204293] [2020-10-27 01:47:59,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:47:59,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:59,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:47:59,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:47:59,315 INFO L87 Difference]: Start difference. First operand 209 states and 282 transitions. Second operand 15 states. [2020-10-27 01:48:02,653 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-27 01:48:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:03,059 INFO L93 Difference]: Finished difference Result 223 states and 296 transitions. [2020-10-27 01:48:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:48:03,060 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-27 01:48:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:03,064 INFO L225 Difference]: With dead ends: 223 [2020-10-27 01:48:03,064 INFO L226 Difference]: Without dead ends: 217 [2020-10-27 01:48:03,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=133, Invalid=678, Unknown=1, NotChecked=0, Total=812 [2020-10-27 01:48:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-27 01:48:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 209. [2020-10-27 01:48:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-27 01:48:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 282 transitions. [2020-10-27 01:48:03,104 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 282 transitions. Word has length 29 [2020-10-27 01:48:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:03,105 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 282 transitions. [2020-10-27 01:48:03,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:48:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 282 transitions. [2020-10-27 01:48:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:48:03,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:03,106 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:03,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:48:03,106 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:03,106 INFO L82 PathProgramCache]: Analyzing trace with hash 812658324, now seen corresponding path program 23 times [2020-10-27 01:48:03,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:03,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455363477] [2020-10-27 01:48:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:03,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:03,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:03,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:03,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:48:03,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:03,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-27 01:48:03,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:48:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:48:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:48:03,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:03,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:03,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:03,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:03,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:03,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:03,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:03,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:03,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 01:48:03,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455363477] [2020-10-27 01:48:03,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:03,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:48:03,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270585663] [2020-10-27 01:48:03,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:48:03,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:48:03,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:48:03,568 INFO L87 Difference]: Start difference. First operand 209 states and 282 transitions. Second operand 10 states. [2020-10-27 01:48:04,726 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-27 01:48:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:05,026 INFO L93 Difference]: Finished difference Result 231 states and 309 transitions. [2020-10-27 01:48:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:48:05,027 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 01:48:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:05,029 INFO L225 Difference]: With dead ends: 231 [2020-10-27 01:48:05,030 INFO L226 Difference]: Without dead ends: 225 [2020-10-27 01:48:05,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:48:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-27 01:48:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 209. [2020-10-27 01:48:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-27 01:48:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 282 transitions. [2020-10-27 01:48:05,070 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 282 transitions. Word has length 29 [2020-10-27 01:48:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:05,071 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 282 transitions. [2020-10-27 01:48:05,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:48:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 282 transitions. [2020-10-27 01:48:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:48:05,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:05,072 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:05,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:48:05,072 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:05,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:05,073 INFO L82 PathProgramCache]: Analyzing trace with hash -914215628, now seen corresponding path program 8 times [2020-10-27 01:48:05,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:05,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436018134] [2020-10-27 01:48:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:05,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:05,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:05,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:06,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:06,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:48:06,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:48:06,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1868 [2020-10-27 01:48:06,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:06,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:48:06,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:06,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:48:06,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:07,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:07,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:07,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:07,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:07,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:07,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:07,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:07,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:07,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:07,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:07,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 01:48:07,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436018134] [2020-10-27 01:48:07,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:07,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:48:07,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330783437] [2020-10-27 01:48:07,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:48:07,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:07,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:48:07,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:48:07,214 INFO L87 Difference]: Start difference. First operand 209 states and 282 transitions. Second operand 13 states. [2020-10-27 01:48:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:09,557 INFO L93 Difference]: Finished difference Result 255 states and 332 transitions. [2020-10-27 01:48:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:48:09,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-27 01:48:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:09,560 INFO L225 Difference]: With dead ends: 255 [2020-10-27 01:48:09,560 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 01:48:09,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:48:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 01:48:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 208. [2020-10-27 01:48:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 01:48:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 278 transitions. [2020-10-27 01:48:09,592 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 278 transitions. Word has length 29 [2020-10-27 01:48:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:09,592 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 278 transitions. [2020-10-27 01:48:09,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:48:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 278 transitions. [2020-10-27 01:48:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:48:09,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:09,593 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:09,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:48:09,594 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:09,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:09,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1889195323, now seen corresponding path program 14 times [2020-10-27 01:48:09,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:09,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282151572] [2020-10-27 01:48:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:09,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:09,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:09,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:10,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:10,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:48:10,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:48:10,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 724 [2020-10-27 01:48:10,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:10,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:48:10,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:10,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:48:10,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:10,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:10,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:10,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:10,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:10,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:10,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:10,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:10,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:10,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:10,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:10,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:48:10,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282151572] [2020-10-27 01:48:10,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:10,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:48:10,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986821314] [2020-10-27 01:48:10,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:48:10,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:10,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:48:10,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:48:10,728 INFO L87 Difference]: Start difference. First operand 208 states and 278 transitions. Second operand 17 states. [2020-10-27 01:48:13,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:13,088 INFO L93 Difference]: Finished difference Result 336 states and 489 transitions. [2020-10-27 01:48:13,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:48:13,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-10-27 01:48:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:13,091 INFO L225 Difference]: With dead ends: 336 [2020-10-27 01:48:13,092 INFO L226 Difference]: Without dead ends: 315 [2020-10-27 01:48:13,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:48:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-27 01:48:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 208. [2020-10-27 01:48:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 01:48:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 277 transitions. [2020-10-27 01:48:13,139 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 277 transitions. Word has length 29 [2020-10-27 01:48:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:13,139 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 277 transitions. [2020-10-27 01:48:13,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:48:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 277 transitions. [2020-10-27 01:48:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:48:13,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:13,141 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:13,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:48:13,141 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:13,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:13,141 INFO L82 PathProgramCache]: Analyzing trace with hash 97210107, now seen corresponding path program 24 times [2020-10-27 01:48:13,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:13,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908940907] [2020-10-27 01:48:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:13,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:13,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:13,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:14,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:14,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:48:14,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:48:14,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 976 [2020-10-27 01:48:14,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:48:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:48:14,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:25,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:25,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:25,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:25,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:25,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:25,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:25,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:25,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 3 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:48:25,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908940907] [2020-10-27 01:48:25,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:25,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:48:25,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957154495] [2020-10-27 01:48:25,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:48:25,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:25,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:48:25,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=260, Unknown=5, NotChecked=0, Total=306 [2020-10-27 01:48:25,326 INFO L87 Difference]: Start difference. First operand 208 states and 277 transitions. Second operand 18 states. [2020-10-27 01:48:25,760 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52